VAMP 121, User Manual, Page: 6 / 26

1.1 Arc protection unit VAMP
121(D) 1 General
6
V121/EN M/A017
1. Connection for portable arc sensor (VA 1 DP)
2. Programming switches
3. POWER indicator light, indicates that the supply voltages of
each component are in order.
4. INST/BLOCK indicator light, lit when the unit is in a
installation or blocked mode.
5. ERROR indicator light, indicates an internal fault detected
by the component’s self-diagnostics. Such faults include
faulty arc sensor or changes in the amount of sensors.
6. LED lights indicating sensor activation
7. Terminal block for ten arc sensors
8. Portable arc sensor VA 1 DP connected and operational
9. Portable arc sensor activated
10. I/O unit trip relays activated
11. Terminal block for output relay
12. Text pocket for sensor specific labels (VAM 121D only)