Siemens SIRIUS 3RK3 - Page 101

Internal circuit diagram
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Figure 5-12 2/4F‑DI 1/2F‑RO internal circuit diagram
Terminal designations of the expansion module 2/4F‑DI 1/2F‑RO
Terminal Meaning Description
T1 Test output for inputs IN1,
IN3
• Test outputs with di󹪜erent test signals
• Connection for sensor contacts for detecting cross-
circuits
T2 Test output for inputs IN2,
IN4
IN1 ... IN4 Safety-related sensor inputs Terminal for safety sensors
Combinations for two-channel connection:
• IN1 with IN2
• IN3 with IN4
Q1.1, Q1.2 Safety-related relay output Isolated output for connecting actuators
Q2.1, Q2.2 Safety-related relay output
L+ Power supply 24 V DC
M Ground Ground to 24 V DC
Interfaces of the expansion module 2/4F‑DI 1/2F‑RO
Interface Meaning Description
X1 System interface Connection of central unit/expansion module
X2 System interface Connection of expansion module
Displays of the expansion module 2/4F‑DI 1/2F‑RO
Element Meaning
SF / IN1 Group error / status of the sensor input
IN2, IN3, IN4 Status of the sensor inputs
Q1, Q2 State of the relay outputs
Description of the hardware
5.1 Description of the individual modules
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 101