Safe torque off function 139
Maximum cable lengths:
• 300 m (984 ft) between activation switch (K) and drive control unit
• 60 m (200 ft) between multiple drives
• 60 m (200 ft) between external power supply and first drive.
Note that the voltage at the INx terminals of each drive must be at least 13 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.
Single drive (internal power supply)
OUT2
OUT1
+ 24 V DC
IN1
IN2
T1/U,
T2/V,
T3/W
Control unit
SGND
+ 24 V DC
STO
UDC+
UDC-
A
Drive
34
35
36
37
38
Control logic
K
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