Wiring The Thermistor Relay(S) (Options +L505 And +2L505) - ABB ACS880-37 Hardware Manual

98 Electrical installation

Wiring the thermistor relay(s) (options +L505 and +2L505)

The external wiring of option +2L505 (two thermistor relays) is shown below. For example,
one relay can be used to monitor the motor windings, the other to monitor the bearings.
The maximum contact load capacity is 250 V AC 10 A. For the actual wiring, see the circuit
diagram delivered with the drive.
X506
T
1
1...n × PTC
1
2
3
2
4
5
6
T
7
1...n × PTC
3
8
9
4
10
11
12
25
26
27
28
1 PTC sensors monitored by relay K74.
R = R + R
G 1
2 External reset for relay K74 (to be bridged for
autoreset functionality)
3 PTC sensors monitored by relay K75.
R = R + R
G 1
4 External reset for relay K75 (to be bridged for
autoreset functionality)
5 Overheat indication from relay K74:
overtemperature = contact open.
6 Overheat indication from relay K75:
overtemperature = contact open.
5
6
+ R < 1.5 kohm.
2 N
+ R < 1.5 kohm.
2 N