Wiring With External Power Supply; Activation Switch; Cable Types And Lengths - ABB ACS560 Hardware Manual

2 Safety PLC
K Safety relay

Wiring with external power supply

1
STO
34 OUT1
35 OUT2
36 SGND
37 IN1
38 IN2
1 Drive
2 Safety PLC
K Safety relay
￭

Activation switch

In the wiring diagrams, the activation switch has the designation [K]. This
represents a component such as a manually operated switch, an emergency stop
push button switch, or the contacts of a safety relay or safety PLC.
• In case a manually operated activation switch is used, the switch must be of
a type that can be locked out to the open position.
• The contacts of the switch or relay must open/close within 200 ms of each
other.
￭

Cable types and lengths

• ABB recommends double-shielded twisted-pair cable.
• Maximum cable lengths:
• 300 m (1000 ft) between activation switch [K] and drive control unit
• 60 m (200 ft) between external power supply and control unit
Note: A short-circuit in the wiring between the switch and an STO terminal causes
a dangerous fault. Therefore, it is recommended to use a safety relay (including
wiring diagnostics) or a wiring method (shield grounding, channel separation)
which reduces or eliminates the risk caused by the short-circuit.
The Safe torque off function 197
24 V DC
-
+
13 23 31
K
14 24 32
OUT
Y1 Y2
A1 A2
GND
2