Commissioning; General Wiring Instructions - Vacon optbj Safety Manual

Commissioning

6. C
OMMISSIONING
NOTE! The use of STO, SS1 or other safety functions does not itself ensure safety. Always make
sure that the safety of the entire system is confirmed.
NOTE! The user is responsible for excluding faults in the external wiring.
6.1

General wiring instructions

• The wiring should be done according to the general wiring instructions for the specific prod-
uct where OPTBJ is installed. See wiring examples in the figures 11, 12 and 13.
• If shielded cable is used, the shield must be connected to the drive's lid (PE) using a ground-
ing clamp.
• EN 60204-1 part 13.5: The voltage drop from supply point to load must not exceed 5%.
• In practice, due to electromagnetic disturbances, the cable length should be limited to to
max. 200 m when using shielded cable and to max. 50 m when using unshielded cable. In a
noisy environment, the length of the cable could still be less in order to avoid unwanted trip-
ping.
• Using unshielded cables is not allowed with some STO input configurations. Also some STO
input connection options are not allowed to be used with certain safety actuator types. See
Table 9 for details.
• The +24V power supply used for safety actuators may come from control board (e.g. drive's
control connector pins 6 & 7) or it may also be external, earth fault and short circuit pro-
tected power supply.
Local contacts: https://www.danfoss.com/en/contact-us/contacts-list/
SAFETY ACTUATOR
+24V
SW P
OV
SW M
11851_uk
Figure 11. STO connection example 1
OPTBJ
CHANNEL 1
STO1+
STO1-
OPTBJ
CHANNEL 2
STO2+
STO2-
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