4
Electrical installation
Festo – GDCP-CMMD-AS-HW-EN – 1404NH – English
35
4.5.3
Circuitry with use of the STO safety function [X3 1/2]
The safety function does not provide protection against electric shock, only against haz-
ardous movements. For intended use of the safety function STO – “Safe Torque Off ”
(
Description of STO safety function, GDCP-CMMD-AS-S1-...).
If you need the integrated STO safety function in your application, you must remove the bridge between
Pin 1 and Pin 2 at interface [X3 1/2]to operate the motor controller
Tab. 4.13.
Recommendation for initial start-up without safety engineering:
Minimum circuitry with emergency stop switching device and two-channel switch-off via the control
ports:
–
REL ([X3.1/2] Pin 2)
–
DIN4 ([X1.1/2] Pin 21).
Note
Loss of the safety function.
Lack of the safety function can result in serious, irreversible injuries, e.g. due to uncon-
trolled movements of the connected actuator technology. Bypassing of safety equip-
ment is impermissible.
•
Make sure that no jumpers or the like can be used parallel to the safety wiring, e.g.
through the use of the maximum wire cross sections or appropriate wire end sleeves
with insulating collars.
•
Use twin wire end sleeves for looping through lines between neighbouring devices.
