Page 172 - EPR Catalog 2015
P. 172
Temperature monitoring relays
Function diagrams
CM-TCS - Overtemperature monitoring, 1 x 2 c/o contacts j A1-A2 2CDC 252 008 F0209
With this configuration, settings via t2 have no influence on the operating function (t2 disabled). Threshold ϑ1
Open-circuit principle: Hysteresis
If the measured value is correct, the output relays remain de-energized when control supply voltage is applied. If the
Measured value
2 measured value exceeds the adjusted threshold value t1, the output relays energize. If the measured value drops
Open-circuit principle open
again below the adjusted threshold value t1 minus the adjusted hysteresis, the output relays de-energize. 11-14
Closed-circuit principle: 11-12
The behavior is inverse to the one with open-circuit principle. 21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
Closed-circuit principle closed
11-14
11-12
21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
Overtemperature monitoring, 2 x 1 c/o contact i A1-A2 2CDC 252 009 F0209
Open-circuit principle: Threshold ϑ1
Hysteresis
If the measured value is correct, the output relays remain de-energized when control supply voltage is applied. If the
measured value exceeds the adjusted threshold value t2, output relay R2 (prewarning) energizes. If the measured Threshold ϑ2
value exceeds the adjusted threshold value t1, output relay R1 (final switch-off) energizes. Hysteresis
If the measured value drops again below the adjusted threshold value t1 minus the adjusted hysteresis, output relay
R1 (final switch-off) de-energizes. If the measured value drops below the adjusted threshold value t2 minus the Measured value
adjusted hysteresis, output relay R2 (prewarning) de-energizes. Open-circuit principle open
11-14
Closed-circuit principle: 11-12
21-24
The behavior is inverse to the one with open-circuit principle. 21-22
U: green LED
ϑ: red LED
R: yellow LED
Closed-circuit principle closed
11-14
11-12
21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
Undertemperature monitoring, 1 x 2 c/o contacts j A1-A2 2CDC 252 010 F0209
With this configuration, settings via t1 have no influence on the operating function (t1 disabled).
Measured value
Open-circuit principle: Hysteresis
If the measured value is correct, the output relays remain de-energized when control supply voltage is applied. If
the measured value drops below the adjusted threshold value t2, the output relays energize. If the measured value Threshold ϑ2
exceeds again the adjusted threshold value t2 plus the adjusted hysteresis, the output relays de-energize.
Closed-circuit principle: Open-circuit principle open
The behavior is inverse to the one with open-circuit principle. 11-14
11-12
21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
Closed-circuit principle closed
11-14
11-12
21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
Undertemperature monitoring, 2 x 1 c/o contact i A1-A2 2CDC 252 011 F0209
Open-circuit principle: Measured value
If the measured value is correct, the output relays remain de-energized when control supply voltage is applied. If the Hysteresis
measured value drops below the adjusted threshold value t1, output relay R1 (prewarning) energizes. If the measured
value drops below the adjusted threshold value t2, output relay R2 (final switch-off) energizes. Threshold ϑ1
If the measured value exceeds again the adjusted threshold value t2 plus the adjusted hysteresis, output relay R2
(final switch-off) de-energizes. If the measured value exceeds the adjusted threshold value t1 plus the adjusted Hysteresis
hysteresis, output relay R1 (prewarning) de-energizes. Threshold ϑ2
Closed-circuit principle:
The behavior is inverse to the one with open-circuit principle. Open-circuit principle open
11-14
11-12
21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
Closed-circuit principle closed
11-14
11-12
21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
Temperature window monitoring, 1 x 2 c/o contacts j A1-A2 2CDC 252 012 F0209
Open-circuit principle: Threshold ϑ1
Hysteresis
If the measured value is correct, the output relays remain de-energized when control supply voltage is applied. If
the measured value exceeds the adjusted threshold value t1 or drops below the adjusted threshold value t2, the Measured value
output relays energize. If the measured value drops again below the adjusted threshold value t1 minus the adjusted Hysteresis
hysteresis or exceeds again the adjusted threshold value t2 plus the adjusted hysteresis, the output relays de-
Threshold ϑ2
energize.
Open-circuit principle open
Closed-circuit principle: 11-14
11-12
The behavior is inverse to the one with open-circuit principle. 21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
Closed-circuit principle closed
11-14
11-12
21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
Temperature window monitoring, 2 x 1 c/o contact i A1-A2 2CDC 252 013 F0209
Open-circuit principle: Threshold ϑ1
Hysteresis
If the measured value is correct, the output relays remain de-energized when control supply voltage is applied.
If the measured value exceeds the adjusted threshold value t1 or drops below the adjusted threshold value t2, output Measured value
relay R1 (> t1) or R2 (< t2) respectively energizes. Hysteresis
If the measured value drops again below the adjusted threshold value t1 minus the adjusted hysteresis or exceeds
again the adjusted threshold value t2 plus the adjusted hysteresis, output relay R1 (>t1) or R2 (<t2) respectively de- Threshold ϑ2
energizes. Open-circuit principle open
11-14
Closed-circuit principle: 11-12
21-24
The behavior is inverse to the one with open-circuit principle. 21-22
U: green LED
ϑ: red LED
R: yellow LED
Closed-circuit principle closed
11-14
11-12
21-24
21-22
U: green LED
ϑ: red LED
R: yellow LED
2/105 ABB | Catalog Electronic Products and Relays 2015 | 2CDC 110 004 C0210
