Page 155 - EPR Catalog 2015

Thermistor motor protection relays 2
Operating controls

1 Test / Reset button
Reset - only possible if measured value < switch-on resistance

2 Indication of operational states with LEDs

U: green LED - Status indication of control supply voltage V

1 Control supply voltage applied
F: red LED - Fault message
R: yellow LED - Status indication of the output relay

2 3 Marker label / DIP switches (depending on device) e.g.
i Single evaluation 2 x 1 c/o (SPDT) contact
j Accumulative evaluation 1 x 2 c/o (SPDT) contacts
y Short-circuit detection de-activated
x Short-circuit detection activated
f Non-volatile fault storage activated

3 e Non-volatile fault storage de-activated

2CDC 253 001 F0015

LEDs, status information and fault messages CM-MSS

Operational state U: green LED F: red LED R: yellow LED
Absence of control supply voltage OFF OFF OFF
No fault V OFF V
Short circuit V Y OFF
Interrupted wire V Z OFF
Measuring circuit 1: Overtemperature V V OFF
Measuring circuit 2: Overtemperature V W OFF
Test function X OFF OFF
Fault rectified but not confirmed V -- 1) X
Change of configuration not confirmed V OFF X
Control supply voltage not within the tolerance range X V OFF
Internal fault 2) OFF W W
Internal fault 2) X X X

1) Depending on the fault with the highest priority
2) Restart the device. If after restart the same fault is indicated, replace the device.

In case of several faults, the fault with the higher priority is shown. The reset can be made after rectification and confirmation of the last fault.

2CDC 110 004 C0210 | Catalog Electronic Products and Relays 2015 | ABB 2/88