Siemens SIRIUS 3RK3 - Connecting Terminal Blocks

Speci󹪝cation and value
in the case of removable termi‐
nal blocks with screw-type ter‐
minals
Speci󹪝cation and value
in the case of removable termi‐
nal blocks with spring-loaded
terminals
Flexible cable with end sleeve/
cable lug

Maximum number of cables x ca‐
ble cross-section:
1 x 0.5 … 2.5 mm
2
or
2 x 0.5 … 1.5 mm
2
Maximum number of cables x ca‐
ble cross-section:
2 x 0.25 … 1.5 mm
2
Flexible cable

Not allowed Maximum number of cables x ca‐
ble cross-section:
2 x 0.25 … 1.5 mm
2
5.3.3.2 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
Terminal FE must be connected to functional ground with a low-resistance connection.
Requirements
• The insulation on the connection cables must be properly stripped to a length of 10 mm.
• Flexible cables must be 󹪝tted with end sleeves or cable lugs for connection to screw-type
terminal blocks. For suitable connection cross-sections of the cables, see Chapter Connection
data for terminal blocks (Page 144).
Description of the hardware
5.3 Connecting / wiring
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 145