2098-DSD-020X-DN A-B Communication Interface
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IN STOCK2098-DSD-020X-DN A-B Communication Interface
Place the main power disconnect switch where operators and maintenance personnel have quick and easy access to it. If you mount a disconnect switch inside the controller enclosure, place the switch operating handle on the outside of the enclosure, so that you can disconnect power without opening the enclosure. Whenever any of the emergency-stop switches are opened, power to input and output devices should be removed. When you use the master control relay to remove power from the external I/O circuits, power continues to be provided to the controller’s power supply so that diagnostic indicators on the processor can still be observed.
The master control relay is not a substitute for a disconnect to the controller. It is intended for any situation where the operator must quickly de-energize I/O devices only. When inspecting or installing terminal connections, replacing output fuses, or working on equipment within the enclosure, use the disconnect to shut off power to the rest of the system.
When using emergency-stop switches, adhere to the following points: • Do not program emergency-stop switches in the controller program. Any emergency-stop switch should turn off all machine power by turning off the master control relay. • Observe all applicable local codes concerning the placement and labeling of emergency-stop switches. • Install emergency-stop switches and the master control relay in your system. Make certain that relay contacts have a sufficient rating for your application. emergency-stop switches must be easy to reach. • In the following illustration, input and output circuits are shown with MCR protection. However, in most applications, only output circuits require MCR protection. The following illustrations show the Master Control Relay wired in a grounded system.
The structure and details of the product：
Please make an inquiry for more models
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