janitza RCM 202-AB, User Manual And Technical Data

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RCM 202-AB
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58 RCM 202-AB
14.2 Replacement of a defective RCM 202-AB
ATTENTION
Only trained specialized personnel may replace the RCM 202-AB.
During replacement, monitoring functions are not operating! External pe-
ripheral devices also report errors/faults.
When replacing the device during operation, the plugs must be discon-
nected and connected in the indicated sequence.
NOTE
Update the serial number of the new device in the system documentation.
It is possible to change the device during operation without turning off the consumers.
To prevent dangerous contact voltage on the terminals of the RCM 202-AB and to
prevent the triggering of malfunctions, the sequence described below must be ob-
served for the removal and reinstallation.
14.2.1 Removal of a defective RCM 202-AB
Disconnect the plug from the power supply (N/L). The power supply for the
RCM 202-AB is interrupted.
Disconnect the connector for the analog and digital outputs.
Short-circuit the transformer disconnect terminal blocks.
Disconnect the plug of the current measurement transformer from the RCM
202-AB.
Disconnect the plug for the Modbus connection.
Unlock the RCM 202-AB and pull it off the top hat rail.
Deliver the defective RCM 202-AB to the service department or dispose of it
properly.
14.2.2 Installation of a new RCM 202-AB
Visually check the new RCM 202-AB for damage.
Disconnect all plugs from the RCM 202-AB and store them in a safe place.
Snap the RCM 202-AB onto the top hat rail.
Check the device for tight fit.
Connect the plug of the RS485 interface to RCM 202-AB. Connect the ground
connection of the RS485 interface with the protective conductor PE.