In the area of functional safety, monofunctional safety switchgear, such as emergency stop modules, standstill monitoring and speed monitoring, multifunctional safety switchgear and safety systems ensure fast and reliable shutdown of machines and systems. Innovative monitoring solutions additionally ensure electrical safety in grounded and ungrounded power supplies by means of residual current monitors, insulation monitoring devices as well as measuring relays and monitoring relays. Intelligent motor starters, soft starters and solid-state relays or solid-state contactors comprise the drive technology product range. The switching devices ensure reliable switching, control and monitoring of motors. Control technology, timing technology and installation technology round off Dold's extensive product portfolio.
The safety relays of the SAFEMASTER series monitor safety functions such as emergency stop, safety gate, light barrier, two-hand control, safety mat or light grid as well as other functions. The solutions for safe drive monitoring ensure increased productivity and operator safety by combining safe speed, standstill or frequency monitoring, optionally also sensorless. The multifunctional safety solutions enable safe monitoring of all safety circuits of machines and systems through modular and configurable safety systems. In addition to the safe mobile radio emergency stop system and wireless enabling switches of the SAFEMASTER W family, Dold also offers a safe, bidirectional radio safety system.
Safety relays monitor various safety functions such as emergency stop or emergency stop, safety door monitoring, two-hand control, safety mat, light barrier as well as other safety functions. The classic, monofunctional safety relays are characterized by quick and easy commissioning and diagnostic functions directly on the safety relay, with convenient plug-in connection technology (push-in) and positively driven contacts. Minimum installation widths from 17.5 mm as well as different housing designs round off the wide product range of Dold safety relays. If you only want to monitor a few safety functions, the safety relays of the SAFEMASTER series are the optimal safety solution.
Safety relays of functional safety are certified according to IEC/EN 61508 up to SIL 3, IEC/EN 62061 up to SIL CL 3 and EN ISO 13849-1 up to Cat. 4 / PL e and can be used worldwide. For the use of safety relays in operating modes with a low demand rate (low-demand mode), we provide additional safety-related characteristic data depending on the device.
Expansion, delay and coupling modules from DOLD allow for cost-effective contact multiplication as well as for the specific shut-down or switching of functions.
The SAFEMASTER S series standstill and speed monitors are used for safe standstill and speed monitoring of drives. The speed monitors detect and signal the standstill and speed of machines and systems in automatic as well as in setup mode. Dold offers efficient and economical solutions for safe sensorless speed monitoring, sensorless frequency monitoring as well as drive monitoring via proximity switches.
The standstill and speed monitor is used in machines and systems where machine movements or moving parts can pose a risk to man and machine. For example, safe monitoring of the reduced operating speed in setup mode increases the safety of the operating personnel. It also increases productivity by preventing unnecessary shutdowns.
Alongside a multitude of monofunctional safety switching devices, DOLD also offer high-performance multifunctional safety switching devices and systems. In doing so, DOLD integrates increasing functionality with constantly sinking space requirements. The multifunctional safety switching devices offer you optimal solutions for many areas of use in machinery and system construction. SAFEMASTER C, which is configurable without additional hardware, is one option here just like the modular safety system SAFEMASTER M, which allows you a cost-effective and software-free adjustment of the safety functions to the respective task. With SAFEMASTER PRO, you receive a safety system that you can tailor to the application using variable expansion modules.
The Wireless Safety System from DOLD in the SAFEMASTER W family allows the safe operation and shut-down of systems with hazardous areas, such as in automatic operation (e.g. troubleshooting, lubrication, calibration work) or in set up operation (e.g. putting into service, machine settings, maintenance). The high availability of your machines and systems is only one of many advantages of this solution. The Wireless Safety wins points with its wear- and maintenance-free radio technology, the flexible and mobile use and a high degree of user-friendliness.
Special devices from DOLD include emergency stop monitors for the fast localisation of actuated emergency stop buttons, emergency stop devices and magnetically coded safety switches. The DOLD emergency stop monitors help to quickly and easily located actuated emergency stop buttons. This can significantly reduce the standstill times of machines and systems. Emergency stop devices from DOLD deactivate machines and/or place them in standstill. This thus reduces dangers to persons or damage to machinery as well as the manufactured products. With the coded magnetic switches from DOLD, the position of movable, rotatable or removable safety doors is monitored. The contactless devices can also be used for doors that are difficult to move or that are imprecisely positioned.
Dold offers you a comprehensive product range in the field of electrical safety of residual current monitors, insulation monitoring devices, insulation fault location systems as well as measuring relays and monitoring relays for unearthed (IT systems) and earthed power systems (TT and TN systems).
The devices detect and report at an early stage when critical limit values of electrical quantities, such as current, voltage, power, insulation resistance, etc., are exceeded. Hazards for man and machine can thus be reliably avoided. Furthermore, the availability of your machines and systems is increased and production downtimes are minimized. The portfolio ranges from standard devices for monitoring individual measured variables (residual current monitors, insulation monitors, etc.) to multifunctional devices and flexible fault indication systems.
Residual current monitors (RCM) measure and monitor residual currents in grounded power supply systems (TN and TT systems). Here, residual current monitoring is carried out according to the principle of residual current measurement and serves primarily to avoid expensive downtimes and to prevent fire hazards that are latent due to creeping insulation faults. Residual current monitors are used in systems in which, in the event of a fault, a message is to be sent but no shutdown is to take place. Compared to residual current circuit breakers (RCD), which trip at certain rated residual currents and cause immediate shutdown, residual current monitors indicate a residual current at an early stage and signal insulation deterioration via an output contact, for example.
Early detection of insulation faults, as well as preventive maintenance and servicing outside of operating hours, can prevent unexpected shutdowns of machines and systems, thus avoiding unwanted interruptions in operation, property damage and high costs. Residual current monitors of the VARIMETER RCM (Residual Current Monitor) series are available as pure AC currents and pulsating DC currents DC (type A according to IEC/TR 60755) as well as all-current sensitive residual current monitors (type B) AC currents, pulsating and smooth DC residual currents DC.
Insulation monitors, also called IMD (Insulation Monitoring Device), monitor the insulation resistance in unearthed AC, AC/DC and DC power supplies (IT systems). This involves measuring the insulation resistance of the IT system to be monitored against earth. These systems are protected by insulation monitoring devices, the use of which is required by law in IT systems by the "Safety of Machinery" standard. Insulation monitoring devices are used to prevent accidents in the event of insulation faults, to prevent failures and generally to protect against fire and accidents.
Insulation fault locators enable fast and precise fault location of insulation faults in unearthed power supplies (IT systems) during operation. The insulation fault location system of the VARIMETER EDS series, consisting of a test current generator and an insulation fault locator, quickly and reliably locates the source of the fault in complex isolated AC/DC systems (IT systems). Differential current transformers (measuring current transformers) are used to record and evaluate the generated test current signals.
A device for insulation fault location, also called IFLS (Insulation Fault Location System), enables insulation faults to be located within a very short time and is used in addition to an insulation monitor. In the event of a fault, it impresses a test current between the live conductors and earth. Components that are pre-damaged with regard to insulation can be located as quickly as possible and replaced before a failure occurs, i.e. there is no need to shut down the system. DIN VDE 0100-410 also recommends for IT systems that an initial insulation fault be rectified as quickly as possible.
The measuring relays and monitoring relays are used wherever electrical safety is a priority. They monitor physical parameters such as voltage, phase failure, current, insulation faults, active power, frequency, standstill etc. In addition to monofunctional measuring and monitoring relays, the extensive relay programme also includes multifunctional and universally applicable measuring relays.
Dold interference suppressors of the INFOMASTER family use lamps, signals or text notifications to inform about interferences and the conditions of electrical systems in industrial settings and buildings. In addition, they are also used to define maintenance intervals for preventive maintenance. Especially in the event of interferences in complex machine and systems, they can decisively reduce the length of the search for interferences. This minimises standstill times of the production system and helps to save on costs. The compact Dold interference suppressor ensures a cost-efficient monitoring of small machines without SPS, such as compressors. Thanks to it modular construction, it can grow with the system through expansions.
In the field of smart drive technology, Dold offers powerful and flexible device solutions such as softstarters and softstop devices, smart motorstarters, motor braking devices, reversing contactors as well as solid state relays / solid state contactors and speed controllers or phase controllers. In today's machines and systems, the most commonly used drive is the three-phase asynchronous motor. Processes such as starting, reversing and braking motors are among the main tasks of electronic switching devices. Where high switching frequencies or high switching cycles are required, solid-state switching devices have proven themselves in industry. With their long service life due to wear-free switching, they solve switching and control tasks in specific applications in a particularly economical way.
With the solid state switching devices of the POWERSWITCH series you get solid state contactors and solid state relays with real added value. For decades, Dold has been developing and producing solid-state switching devices for industrial switching technology. Thanks to the extensive portfolio from a single source, Dold solid-state relays and solid-state contactors offer the possibility to switch loads in a wide range of applications. Plug in, connect, ready! The ready-to-use design, due to the optimally adapted heat sink, allows a quick and easy commissioning in just a few steps.
Where high switching frequencies and cycles are needed, our solid state switching devices are the ideal solution. Once installed, the devices remain operational almost indefinitely. Regular time-consuming and cost-intensive device replacement is therefore unnecessary. The POWERSWITCH series is characterized by wear-free and silent switching and is able to safely and reliably withstand repeated loads as well as high temperatures. This makes our solid-state relays and solid-state contactors particularly suitable for use in medical technology applications, stage technology and in other applications such as heating or lighting.
DOLD reversing contactors of the POWERSWITCH series are used to change the direction of rotation in alternating current motors, start them gently and/or to monitor their load. Various diagnostic functions inform you constantly about the operating condition of the motor. The DOLD reversing contactors save space and have few wires as all functions are combined in a single housing. Costs can also be saved as an alternative to a frequency converter. The devices are universally usable, e.g. for extruders, pumps, actuators or conveyors.
DOLD soft start devices of the MINISTART family ensure that your machines start up gently and smoothly and/or minimise a wide variety of problems such as mechanical wear during the direct start of drives, the tipping or sliding of loads on transport belts, pressure surges in the lines of pump systems and much more. They reduce the wear on and increase the service life of your motors and mechanical drive components. DOLD soft start devices offer additional advantages as a simple and space-saving installation, provide flexible configuration options and relieve the supplying grid through reduced starting current.
The factors of safety and efficiency are an important argument for the motor braking devices of DOLD. The wear- and maintenance-free devices can be easily installed, even in existing systems. The configurable braking current allows an optimal adjustment to machines and systems. Asynchronous motors up to 160 kW are reliably braked with the DOLD braking devices of the MINISTOP series. This allows your machine to be brought to a standstill in only ten seconds in accordance with the EU Machinery Directive and European standards.
The speed controllers from DOLD especially serve the simple speed controlling of pumps and fans to adjust the load on the drive machine. In comparison to frequency converters, they provide with substantially few EMC problems because no shielded wires are necessary. Possible applications are the speed controlling of exhaust fans for large kitchens.
The smart motor starters, often referred to as hybrid motor starters or electronic motor starters, switch and invert 1- and 3-phase motors up to 4 kW quickly and reliably in a space-saving compact enclosure with a width of only 22.5 mm. The motor starters combine up to 7 functions in one control cabinet enclosure and thus enable space savings of up to 80 % compared to the use of conventional devices. The smart motor starters of the MINISTART series offer a combination of motor control functions such as reversing function (counterclockwise rotation / clockwise rotation) or soft start / soft stop and monitoring functions such as current monitoring or motor protection functions as well as galvanic mains isolation. The motor starters ensure low-wear and gentle starting of machines and systems and are suitable for demanding drive tasks such as door and gate controls, conveyor systems as well as bridge and actuator drives and that in efficiency classes IE1, IE2 and IE3.
In addition to classic motor starters, multifunctional motor starters with Modbus RTU interface, phase sequence monitoring and phase failure detection are also available. The phase inverter with automatic rotating field correction also joins the wide product range of electronic motor starters.
DOLD is a pioneer in the field of control technology and present the first SPS in a standard housing in the automobile and tool machine industry in 1978. Benefit from this experience. DOLD offers you a universal portfolio of safe, efficient solutions for control technology that is tailored to your needs. A comprehensive palette of field bus-capable input and output modules are available for you.
The DOLD toggle, coupling and switch relays are the first choice for all interface applications in demanding control systems. They connect the highly sensitive logic level of the SPS, a shelf system or process computer with the raw operation of the power levels of a machine. Installation and maintenance of the relays can be conducted in a time-saving manner with the snap-on plug-in sockets on the top-hat rail. Your additional benefit: They are not sensitive to overcurrent and/or overloads and are significantly less expensive that semiconductors with medium to low switching frequency.
DOLD switch power supply unit and/or switch mode power supply units have diverse uses thanks to a wide voltage range. Their task is to convert unstable input voltage into a constant output voltage. They save space in the control cabinet thanks to their compact construction. They are in accordance with the standard IEC/EN 60950 and EN 61558, are highly effective and feature a short circuit and overload protection.
The increasing complexity of control technology in machines and systems as well as strong trend towards decentralisation result in an increased communication need between control technology and peripheral equipment in machine and system control. The field bus-capable SPS from DOLD is available with a comprehensive palette of field bus-capable input and output modules with which flexibly applications for safety and automation can be simply realised. The input and output modules (I/O modules) represent peripheral components of an SPS in the bus system. Both analogue and digital DOLD bus modules are available for the field bus system CANopen.
The increasing complexity of control technology in machines and systems as well
as strong trend towards decentralisation result in an increased communication
need between control technology and peripheral equipment in machine and system
control. The field bus-capable SPS from DOLD is available with a comprehensive
palette of field bus-capable input and output modules with which flexibly
applications for safety and automation can be simply realised. The input and
output modules (I/O modules) represent peripheral components of an SPS in the
bus system. Both analogue and digital DOLD bus modules are available for the
field bus system CANopen.
DOLD has been a renowned, innovative manufacturer in the field of timer technology for decades that has continued to set standards with its developments. Time relays, that is, relays with specific time response, help you to cost-effectively realised start-up and shut-down delays in industry and building technology. The timer technology from DOLD includes both electro-mechanical and electro-pneumatic time relays as well as electronic devices on the basis of modern microprocessor technology.
DOLD offers you a wide palette of products for installation technology. These basic devices for modern building automation ensure that you aren't left standing in the dark or ensure that energy is reasonably saved over the scope of the lighting controls. Alongside timers and remote switches, energy-saving switches and load shedding relays, additional installation devices, such as Venetian blinds switches, network relays or the innovative hybrid switch relays round out the coordinated DOLD programme of installation devices.
Dold is one of the leading manufacturers in the field of PCB relays and offers the right electromechanical relay for a wide range of application areas. The wide product range includes miniature relays, card relays, bistable relays and safety relays with forcibly guided contacts. As a specialist in PCB relays, we stand for quality and reliability from a single source. To meet the highest quality requirements, we rely on a high vertical range of manufacture, state-of-the-art production facilities and a combination of experience and know-how. Our PCB relays are available in a wide range of contact variants and designs and guarantee maximum switching reliability with minimum dimensions.
Safety technology is becoming increasingly important in mechanical and plant engineering. Safety modules or even safety controllers are used everywhere. Despite the increasing use of semiconductors, electromechanical relays are still an important component. The so-called safety relays, i.e. relays with mechanically forcibly guided contacts according to DIN EN 61810-3, are used wherever people, machines and valuable goods have to be protected against damage and injury. Such a relay consists of at least one normally closed contact and one normally open contact and is constructed in such a way that the normally closed contact and the normally open contact are never closed at the same time. For example, if a normally open contact fails due to opening failure, the associated normally closed contact cannot close when the supply voltage is switched off. This behavior enables easy diagnosis and fault detection when monitoring the positively driven feedback contact.
PCB relays, also known as plug-in/print relays, are used for galvanic separation of circuits as well as for signal adaptation and signal strengthening. Our vertical and horizontal designs enable optimum adaptation to your application. Dold PCB relays, with max. continuous currents up to 16 A, are available with one or two contacts, in different installation heights and with different contact materials.
If it is necessary to switch heavy currents reliably in a small space and galvanic separation of control and load circuits is also required, there is no better answer than the compact miniature power relays available in SMD (Surface Mount Device) form and in DIL (Dual In-Line) form. With the smallest of dimensions, at around 20 mm long and 10 mm wide, they can be inserted into conventional 16-pole IC sockets.
All miniature relays are optionally available as versions with one NO contact or with one changeover contact. Different technologies, contact materials and contact configurations show their strengths in various applications.
Bistable relays can be used to switch applications in a reliable and energy-saving manner. They retain their switched position if supply voltage fails, preventing loss of information on the current switching status. Bistable relays allow for two stable switch positions even when powered down. In comparison to monostable relays, just a short switching impulse of a few milliseconds is enough to switch the relay into a defined switch position. Only a low nominal power level is required. This saves energy and reduces heat generation. In addition, the relays have high vibration and shock resistance. The bistable relay OB 5623 with forcibly guided contacts was developed for special, safety-related applications such as in railway and signal technology.
Our enclosure series includes a wide range of different switch cabinet enclosures, distribution enclosures and a mounting rail bus system (in-rail bus). Whether multifunctional, compact, modular or customized enclosure solution, Dold offers you an extensive product portfolio of thermoplastic DIN rail enclosures. The modular enclosure concept allows the use of different connection systems such as plug-in terminal blocks with screw or spring terminals (push in). Flexible construction widths from 6.2 to 200 mm enable a finely graduated size adjustment to any application.
The integrated DIN rail bus (in-rail bus) ensures fast and reliable data and energy transmission. Instead of complex wiring, the module connection is made by simply snapping it onto the top-hat rail.
Our extensive product portfolio offers 7 different switch cabinet enclosure series for installation in switch cabinets. The universal, modular enclosure systems in widths from 6.2 to 200 mm allow the use of all common terminal technologies (up to 30 connections on 3 terminal levels possible at 22.5 mm width). In addition to conventional screw terminals, the plastic switch cabinet housings can also be equipped with power terminals up to 50 A, cage clamps or modern spring-loaded terminals (push-in). In addition, the techniques are also available with pluggable terminal blocks and in different installation depths of 97 or 118 mm.
The large-area and stable front allows an individual design with plenty of space for operating and display elements as well as programming interfaces. For linking and communication with other devices and systems, a wide variety of connections can of course be realized, such as BUS connections, KNX (EIB), RJ-45, etc. The enclosures are designed for both top-hat rail and screw mounting. The surface is also ideally suited for laser marking or printing.
Ready for the future - the electronics housing KV 4600 sets new standards in modularity and function. All functionality is integrated into the front of the housing and thus offers a high degree of flexibility for your electronics.
During development, special attention was paid to mechanical stability. This also enables the device to be used in mobile applications. Reduce your installation effort - with just a few housing components to the finished device. Increase your degree of automation - the push-in terminals meet the high requirements of the reflow soldering process. The modular housing system with overall widths from 12.5 mm enables tailor-made implementation of a large number of customer-specific applications. Common communication interfaces can also be integrated as an option.
The extensive Dold enclosure program also includes 3 complete families of distribution enclosures or installation enclosures. While the compact enclosures of the KU 4000 and KU 4500 series are content with an installation depth of only 55 mm, the distribution enclosure series KU 4100 offers even more capacity for your electronics with an installation depth of 70 mm. Both series offer enclosure widths from 8.8 to 140 mm and up to 64 or 96 connection terminals (for KU 4000 or KU 4100). In addition to selectable connection terminals, various BUS connections are also available for the distributor enclosure.
The IN-RAIL BUS system is based on a carrier section. It can be easily integrated in the 35 mm standard DIN rail and accommodates the BUS pcb that can be individually configured. With its high flexibility, this concept allows a variety of custom solutions. The In-Rail Bus replaces the costly individual wiring by an uninterruptible and flexible system solution. It is safely integrated in a standard 35 mm top-hat rail. Perfectly fitting carrier sections allow the use of standard rails with a height of 7.5 mm or 15 mm.
The SAFEMASTER STS product range includes electromechanical safety switches, solenoid interlocks (safety switches with guard locking), key transfer and safety command devices and is used for reliable safeguarding of movable guards on machines and equipment.
The SAFEMASTER STS modular interlocking system is type-tested in accordance with the legal requirements and is suitable as a stand-alone system for use in safety applications up to Cat. 4 / PL e in accordance with EN ISO 13849-1 without fault exclusion. The safety switch and key transfer system is available as a reliable FRP version or as a highly robust stainless steel version. Find your suitable safety switch with or without solenoid interlock - in combination with safety relays, Dold offers complete solutions from a single source.
Safety switches of the SAFEMASTER STS series reliably protect accesses and safety doors or flaps on machines and systems and are suitable for safety applications up to Cat. 4 / PL e in accordance with EN ISO 13849-1 without fault exclusion. Electromechanical safety switches (type 2) with separate actuator are ideally suited for safeguarding safety guards that can be rotated, removed or moved sideways and only provide the required safety when closed.
When the safety guard is opened, dangerous movements must be switched off immediately and secured against restarting. The dangerous machine can only be restarted when the safety guard is closed. The very narrow and robust design of the safety switch also allows space-saving mounting on movable guards.
Solenoid interlocks of the SAFEMASTER STS family combine the functional principle and the advantages of electromechanical safety switches with a 2-channel guard locking function. Guard locking ensures that rotating, removable or laterally movable protective devices such as safety guards, hoods, protective grids remain closed as long as a dangerous condition or risk of injury to persons exists. This includes, for example, safety applications with overtravel movements of a machine or system in which, for example, high temperatures or pressure prevail.
However, solenoid interlocks are also used in process protection where opening of the safety guard is not desired, such as unauthorized interference in the production process. Electromechanical solenoid interlocks act together as a link between the higher-level control system (PLC) and safety relay devices such as standstill and speed monitoring or safety time relays. In addition, different coding levels, very high locking forces and extensive diagnostic options enable use in almost any safety-relevant application.
The basic principle of the key transfer system ensures that a machine or system is in a safe state before an access can be made. A further safety aspect is that a key is inserted either in a safety switch or can be used for opening a door lock. This property can be used to force a certain operating sequence, which can not be deviated from. As a result, a high safety level is achieved and a large number of different danger areas can be ensured.
The modularity of the SAFEMASTER STS allows individual adaptions to the corresponding applications. By means of bayonet locks (see accessory) any number of units can be mounted of only a few basic modules. The function of the units are defined from the way and arrangement of the modules, whereby several unities form a system. The possible combinations of the composed unities determine the individual functions of the total system.
The robust stainless steel option module expands the modular safety switch and key transfer system SAFEMASTER STS with variable command, indication, selection and emergency stop functions. This turns the system into a true "control centre" from where command functions, status displays, release signals, main and maintenance access points can be controlled. The option module is form-fitting and can be installed directly underneath safety switches or hold closed units thus enabling direct command execution at the access points for machines and systems. It can also be installed as a standalone command device. You too can benefit from the high degree of system flexibility.
Power Interlocking of the SAFEMASTER STS family enables the simple integration of a load-break switch into the safety switch and key transfer system. It enables the direct separation and safety-related interlocking of the power supply of machines and systems. The safety system thus reliably protects persons entering the hazardous area.