Siemens 3TK28 - Page 40

Description of the individual safety relays
3.6 3TK28 safety relays with relay enabling circuits
3TK28 safety relays
40 Manual, 07/2016, NEB926157502000/RS-AB/003
Disconnecting
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Removing terminal blocks from the device
Step
Operating instruction
Figure
1 Insert a flat-head screwdriver between the clip
of the terminal block and the front panel
①
.
2 Lift the terminal block out of the guiderail of
the device ②
Disconnecting screw-type terminals
Step
Operating instruction
1
Unscrew the screw of the screw-type terminal.
2
Remove the cable from the unscrewed screw-type terminal.
Disconnecting spring-loaded terminals
Step
Operating instruction
1 Insert the flat-head screwdriver into the square opening of the spring-loaded terminal until it engages. Please
observe a 10° horizontal angular deviation of the screwdriver to the oval opening.
2
Remove the cable from the oval opening.
3
Remove the screwdriver.