Siemens SIRIUS 3RK3 Equipment Manual page 164

Description of the hardware
5.3 Connecting / wiring
When use is made of a cable that utilizes the full overall height, the terminal's spring is
deflected to the maximum. Therefore, removal of this cable may become a problem because it
requires further deflection of the spring.
Figure 5-30
Hazardous Voltage
Can Cause Death, Serious Injury, or Property Damage.
Before starting work, therefore, disconnect the system and devices from the power supply.
Note
Functional ground - protective ground conductor
Terminal FE must be connected to functional ground with a low-resistance connection.
Push-in connections are a form of spring-loaded terminals allowing wiring without tools for rigid
conductors or conductors equipped with end sleeves.
For wiring finely stranded or stranded conductors without end sleeves on push-in connections,
a screwdriver is required.
Requirements
• Screwdriver DIN 5264 of the size 0.5 x 3 mm (for finely-stranded conductors only)
• For suitable connection cross-sections of the cables, see Section Connecting the push-in
terminals (Page 163).
164
2.4 mm
1.5 mm
Terminal area
WARNING
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006