ABB ACS880-07, Hardware Manual

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• 60 m (200 ft) between multiple inverter units
• 60 m (200 ft) between external power supply and first inverter unit
• 30 m (100 ft) between BCU control unit and last inverter module in the chain.
Note:
The voltage at the INx terminals of each inverter control unit (or frame R8i inverter module)
must be at least 17 V DC to be interpreted as “1”.
￭ Grounding of protective shields
• Ground the shield in the cabling between the activation switch and the control unit at
the control unit.
• Ground the shield in the cabling between two control units at one control unit only.
• Do not ground the shield in the cabling between BCU and R8i module, or between R8i
modules.
￭ Frame n×R8i inverter unit (internal power supply)
WARNING!
Frame R8i inverter modules are as standard delivered with a jumper wire set that
supplies 24 V from connector X53 to X52. The jumper wire set must be removed
before wiring the Safe torque off circuit.
234 The Safe torque off function

Frame n×R8i inverter unit (internal power supply)
+24 V
OUT1
SGND
IN1
IN2
XSTO
K
IN1
SGND
XSTO OUT
IN2
SGND
24VDC CH1
GND CH1
STO IN (X52)
24VDC CH2
FE
GND CH2
24VDC CH1
GND CH1
STO OUT (X51)
24VDC CH2
FE
GND CH2
24VDC CH1
GND CH1
STO IN (X52)
24VDC CH2
FE
GND CH2
24VDC CH1
GND CH1
STO OUT (X51)
24VDC CH2
FE
GND CH2
Control unit
Inverter module
To next
inverter module
Inverter module
The Safe torque off function 255