ABB ACS880 Series, Application Manual, Page: 20 / 44

20 Implementing a motor thermal protection circuit

Connection diagram (two-channel connection)
The diagram below shows the wiring of the two-channel connection. The system integrator
must acquire the components and do the installations drawn outside the drive border line.
1)
An ATEX-compliant protection relay. The relay monitors a sensor circuit, and de-energizes the FSO module
input by opening the control circuits when necessary.
When you install the equipment, make sure that you maintain separation of the switching (safety) signal with
any other signals.
Control
circuit
ACS880
3
3
3~
Ex
motor
Protection relay
1)
24 - 240 V AC / DC
Sensor
Potentially explosive
atmosphere
XSTO
FSO
1
2
3
4
1 2 3 4 1 2
24 V / 1 A
X111 X112
X1
10
X1
12
1 2 3 4 …10
1 2 3 4 …10
X113
X114