Arc Monitor functions
18
4: DIP switch The DIP switch is a physical switch on the Arc Monitors front.
DIP switches are used to activate the CSU, auto reset and assigning trip
contacts.
5: Detector Inputs Detector inputs are used to connect the detectors to the Arc Monitor.
6: Current Sensing
Unit input
The Current Sensing Unit (CSU) is an accessory needed only in those few
specific applications where strong light is expected on a regular basis. Cur-
rent Sensing Units are connected with an optical fibre using light as signal for
normal current. If the connection is removed by accident, the system ignores
the CSU and will react only on an arc flash.
Note!
DIP Switch 1 or/and 2 must be configured if the CSU is in use.
To read more about the CSU configuration; See the chapter “One (1) CSU
connected” on page - 44
7: Current Sensing
Unit output
This output is used to pass the CSU signal forward to another Arc Monitor.
8: External HMI
connection
HMI can be mounted separately or a second module can be connected
(option).
Note!
Only use the included three meter (118 inch) cable for communication.
To learn more about the HMI functions; See the chapter “Human Machine
Interface, functions” on page - 61.
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