Siemens SIRIUS 3RK3 - Plugging in Terminal Blocks

Disconnecting spring-loaded terminals
Step Instructions Figure
1 Insert the 󹪞at-head screwdriver into the square
opening of the spring-loaded terminal until it
engages. Please observe a 10° horizontal angu‐
lar deviation of the screwdriver to the oval open‐
ing.
~10°
~10°
3 mm
2 Remove the cable from the oval opening.
3 Remove the screwdriver.
5.3.3.8 Plugging in terminal blocks
WARNING
Hazardous Voltage.
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Requirement
You must have removed the terminal blocks, for the purpose of replacing a device, for example.
Procedure when plugging in the terminal blocks
Note
Removable terminal blocks are mechanically coded to prevent polarity reversal
The removable terminal blocks are mechanically coded to prevent polarity reversal and are
labeled with A, B, C or D on the inside. Only use the slots shown in the diagram below.
Note
Plug-in sequence
Connect terminal block B before terminal block A, and D before C.
Description of the hardware
5.3 Connecting / wiring
SIRIUS 3RK3 Modular Safety System
156 Equipment Manual, 07/2020, NEB926253002000/RS-AC/006