Siemens SIRIUS 3RK3 Equipment Manual page 98

Description of the hardware
5.1 Description of the individual modules
Internal circuit diagram
Figure 5-11
Terminal designations of the expansion module 4/8F-DI:
Terminal
T1
T2
IN1 ... IN8
L+
M
Interfaces of the expansion module 4/8F-DI:
Interface
X1
X2
Displays of the expansion module 4/8F-DI
Element
SF / IN1
IN2 ... IN8
98
EM 4/8F-DI internal circuit diagram
Meaning
Test output for inputs IN1,
IN3, IN5, IN7
Test output for inputs IN2,
IN4, IN6, IN8
Safety-related sensor inputs
Power supply
Ground
Meaning
System interface
System interface
Meaning
Group error / status of the sensor input
Status of the sensor inputs
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
• IN5 with IN6
• IN7 with IN8
24 V DC
Ground to 24 V DC
Description
Connection of central unit/expansion module
Connection of expansion module
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006