Siemens SIRIUS 3RK3 Equipment Manual page 101

Internal circuit diagram
Figure 5-12
Terminal designations of the expansion module 2/4F‑DI 1/2F‑RO
Terminal
T1
T2
IN1 ... IN4
Q1.1, Q1.2
Q2.1, Q2.2
L+
M
Interfaces of the expansion module 2/4F‑DI 1/2F‑RO
Interface
X1
X2
Displays of the expansion module 2/4F‑DI 1/2F‑RO
Element
SF / IN1
IN2, IN3, IN4
Q1, Q2
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006
2/4F‑DI 1/2F‑RO internal circuit diagram
Meaning
Test output for inputs IN1,
IN3
Test output for inputs IN2,
IN4
Safety-related sensor inputs
Safety-related relay output
Safety-related relay output
Power supply
Ground
Meaning
System interface
System interface
Meaning
Group error / status of the sensor input
Status of the sensor inputs
State of the relay outputs
Description of the hardware
5.1 Description of the individual modules
Description
• Test outputs with different test signals
• Connection for sensor contacts for detecting cross-
circuits
Terminal for safety sensors
Combinations for two-channel connection:
• IN1 with IN2
• IN3 with IN4
Isolated output for connecting actuators
24 V DC
Ground to 24 V DC
Description
Connection of central unit/expansion module
Connection of expansion module
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