Siemens SIRIUS 3RK3 - Connection Data for Terminal Blocks; Connecting Terminal Blocks

Description of the hardware
5.3 Connecting/wiring
Modular Safety System 3RK3
74 System Manual, 10/2008, 926 2530-02 DS 02
5.3.4 Connection data for terminal blocks
The following connection data apply dependent on the removable terminal block:
Specification and value
in the case of removable
terminal blocks with screw-type
terminals
Specification and value
in the case of removable
terminal blocks with spring-
loaded terminals
Screwdriver
Cross-tip screwdriver
Size: PZ 2 (⌀ 5 … 6 mm)
Torque: 0.8 … 1.2 Nm
Screwdriver
Size: 0 or 1 (width to 3 mm) for
raising the terminal springs
Rigid cable

Maximum number of cables x
cable cross-section:
1 x 0.5 … 4.0 mm
2
or
2 x 0.5 … 2.5 mm
2
Maximum number of cables x
cable cross-section:
2 x 0.25 … 1.5 mm
2
Flexible cable with end
sleeve/cable lug

Maximum number of cables x
cable cross-section:
1 x 0.5 … 2.5 mm
2
or
2 x 0.5 … 1.5 mm
2
Maximum number of cables x
cable cross-section:
2 x 0.25 … 1.5 mm
2
Flexible cable

Not allowed Maximum number of cables x
cable cross-section:
2 x 0.25 … 1.5 mm
2
5.3.5 Connecting 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.
Note
Functional ground - protective ground conductor
Functional ground FE must be connected with the protective ground conductor PE with as
low an impedance as possible.