ABB ACS880-11 - Safe Torque off (XSTO); FSO-XX Safety Functions Module Connection (X12)

Use shielded twisted-pair cable with a twisted pair for data and a wire or another pair
for signal ground (nominal impedance 100 to 165 ohm, for example Belden 9842) for
the wiring. For best immunity, ABB recommends high quality cable. Keep the cable as
short as possible. Avoid unnecessary loops and parallel runs near power cables such
as motor cables.
The following diagram shows the wiring between control units.
ZCU-12
XD2D XD2D XD2D
J3J3 J3
1 2 3
B A
BGND
1 2 3
B A
BGND
1 2 3
B A
BGND
￭ Safe torque off (XSTO)
See chapter The Safe torque off function (page 209).
Note: The XSTO input only acts as a true Safe torque off input on the inverter control
unit. De-energizing the IN1 and/or IN2 terminals of other units (supply, DC/DC converter,
or brake unit) will stop the unit but not constitute a true safety function.
￭ FSO-xx safety functions module connection (X12)
See the user manual of the FSO-xx module.
Control units of the drive 135