Connection Data For Terminal Blocks; Connecting Terminal Blocks - Siemens Sirius 3RK3 System Manual

Description of the hardware
5.3 Connecting/wiring
5.3.4

Connection data for terminal blocks

The following connection data apply dependent on the removable terminal block:
Screwdriver
Rigid cable
Flexible cable with end
sleeve/cable lug
Flexible cable
5.3.5

Connecting terminal blocks

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.
74
WARNING
Specification and value
in the case of removable
terminal blocks with screw-type
terminals
Cross-tip screwdriver
Size: PZ 2 (⌀ 5 ... 6 mm)
Torque: 0.8 ... 1.2 Nm
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:
1 x 0.5 ... 2.5 mm
2
or
2 x 0.5 ... 1.5 mm
2
Not allowed
Specification and value
in the case of removable
terminal blocks with spring-
loaded terminals
Screwdriver
Size: 0 or 1 (width to 3 mm) for
raising the terminal springs
Maximum number of cables x
cable cross-section:
2 x 0.25 ... 1.5 mm
Maximum number of cables x
cable cross-section:
2 x 0.25 ... 1.5 mm
Maximum number of cables x
cable cross-section:
2 x 0.25 ... 1.5 mm
Modular Safety System 3RK3
System Manual, 10/2008, 926 2530-02 DS 02
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