- Normally open
- Relay contact
- 250 VAC
- Max. relay voltage
- RS485
- Modbus RTU
- 9 to 36 VDC
- Supply voltage
Overview
Where it works
WDT-4 is a DIN-rail redundancy controller. When the modules on the Modbus bus or the module itself stop working, it switches over to an external photo sensor or clock. Its built-in relay operates when Modbus communication is lost, and it runs on 9 to 36 VDC.
Mounting: 35 mm DIN rail (IEC 60715)
- Automatic switching of the relay contacts to the NC (normally closed) position when Modbus communication is lost (emergency mode)
- Automatic switching of the relay contacts to the NO (normally open) position when Modbus communication is present (normal mode)
Datasheet
Technical data
General
- Redundancy module
- Modbus module that monitors the operation of a GWU module
Power supply
- Supply voltage
- 9 to 36 VDC
- Consumption
- max. 35 mA
Relay output
- Relay type
- Electromagnetic relay
- Contact type
- Normally open
- Maximum operating voltage
- 250 VAC
- Maximum contact current
- 5 A (AC-3), 1 A (AC-1)
Communication
- Interface
- RS485
- Protocol
- Modbus RTU
Environment
- Operating temperature
- -20 to 60 °C
- Storage temperature
- -20 to 80 °C
- Relative humidity
- below 95 %, non-condensing
Status LEDs
- GreenOnExternal power supply to the controller present
Installation
Dimensions and connection
Transport, warranty and maintenance
- Transport and storage
- Protect the module from shocks and avoid extreme conditions. Store it in the original packaging.
- Warranty
- Two years from the date of manufacture against manufacturing defects. Modifications to the product after the publication date of its documentation release the manufacturer from liability. The manufacturer is not responsible for typographical or other errors in the documentation.
- Maintenance
- Under normal conditions the module needs no maintenance. Light dirt comes off with a dry or slightly damp cloth; for heavier dirt use non-aggressive cleaning products. Always disconnect the power supply first, keep liquids out of the housing and reconnect the power only when the module is completely dry.
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