ABB CM serie Betriebs- Und Montageanleitung Seite 11

IV Function diagrams
a) Overtemperature monitoring
b) Overtemperature monitoring
c) Undertemperature monitoring
d) Undertemperature monitoring
e) Temperature window monitoring
f) Temperature window monitoring
Control supply voltage
t
Threshold value 1
Hysteresis
Measured value
t
Threshold value 2
Open-circuit principle
Output relay R1
Output relay R2
Green LED
Red LED
Yellow LED
Closed-circuit principle
Operating mode
Overtemperature monitoring, 1 x 2 c/o contacts
With this configuration, settings via
operating function.
Open-circuit principle:
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
the output relays energize. If the measured value drops again
below the adjusted threshold value
hysteresis, the output relays de-energize.
Closed-circuit principle:
The behavior is inverse to the one with open-circuit principle.
Overtemperature monitoring, 2 x 1 c/o contact
Open-circuit principle:
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
output relay R2 (prewarning) energizes. If the measured value
exceeds the adjusted threshold value
switch-off) energizes.
If the measured value drops again below the adjusted threshold
t
value 1 minus the adjusted hysteresis, output relay R1 (final
switch-off) de-energizes. If the measured value drops below the
t
adjusted threshold value 2 minus the adjusted hysteresis, output
relay R2 (prewarning) de-energizes.
Closed-circuit principle:
The behavior is inverse to the one with open-circuit principle.
Undertemperature monitoring, 1 x 2 c/o contacts
With this configuration, settings via
operating function.
Open-circuit principle:
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
t
2, the output relays energize. If the measured value exceeds
again the adjusted threshold value
hysteresis, the output relays de-energize.
Closed-circuit principle:
The behavior is inverse to the one with open-circuit principle.
English
p j
, 1 x 2 c/o contacts
p i
, 2 x 1 c/o contact
q j
, 1 x 2 c/o contacts
q i
, 2 x 1 c/o contact
r
, 1 x 2 c/o contacts
r i
, 2 x 1 c/o contact
t
2 have no influence on the
t
1 minus the adjusted
t
1, output relay R1 (final
t
1 have no influence on the
t
2 plus the adjusted
Undertemperature monitoring, 2 x 1 c/o contact
Open-circuit principle:
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
t
1, output relay R1 (prewarning) energizes. If the measured value
j
drops below the adjusted threshold value
switch-off) energizes.
If the measured value exceeds again the adjusted threshold value
t
2 plus the adjusted hysteresis, output relay R2 (final switch-off)
de-energizes. If the measured value exceeds the adjusted
threshold value
(prewarning) de-energizes.
Closed-circuit principle:
The behavior is inverse to the one with open-circuit principle.
Temperature window monitoring, 1 x 2 c/o contacts
Open-circuit principle:
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
drops below the adjusted threshold value
energize.
If the measured value drops again below the adjusted threshold
t
value 1 minus the adjusted hysteresis or exceeds again the
adjusted threshold value
output relays de-energize.
Closed-circuit principle:
The behavior is inverse to the one with open-circuit principle.
t
1,
Temperature window monitoring, 2 x 1 c/o contact
Open-circuit principle:
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
drops below the adjusted threshold value
t t
(> 1) or R2 (<
If the measured value drops again below the adjusted threshold
t
value 1 minus the adjusted hysteresis or exceeds again the
adjusted threshold value
t
relay R1 (> 1) or R2 (<
t
2,
Closed-circuit principle:
The behavior is inverse to the one with open-circuit principle.
All operating states are signalled by the front-face LEDs.
See table „LEDs, status information and fault messages".
t
2, output relay R2 (final
t
1 plus the adjusted hysteresis, output relay R1
t
2 plus the adjusted hysteresis, the
2) respectively energizes.
t
2 plus the adjusted hysteresis, output
t
2) respectively de-energizes.
t
1 or
t
2, the output relays
t
1 or
t
2, output relay R1
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