Siemens SIRIUS 3RK3 Equipment Manual page 78

Description of the hardware
5.1 Description of the individual modules
Terminal names of the 3RK3 Basic central unit
Terminal
T1
T2
IN1 ... IN8
Q1.1, Q1.2
Q2
L+
M
FE
Interfaces of the 3RK3 Basic central unit
Interface
X1
X2
X3
Operator controls of the 3RK3 Basic central unit
Element
RESET button
Displays of the 3RK3 Basic central unit
Element
DEVICE
SF
78
Meaning
Test output for inputs IN1,
IN3, IN5, IN7
Test output for inputs IN2,
IN4, IN6, IN8
Safety-related sensor inputs
Safety-related relay output
Safety-related semiconduc‐
tor output
Power supply
Ground
Functional ground
Meaning
Device interface
System interface
External memory module
Meaning
• Error acknowledgment
• Factory setting
Meaning
Device status
Group error
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
Isolated two-channel output for connecting actuators
Two-channel output for connecting actuators
24 V DC
Ground to 24 V DC
Shielding, equipotential bonding
Description
Connection of PC or programming device, interface mod‐
ule, diagnostics display
Interface for connecting expansion modules (e.g. I/O
modules)
Slot for external memory module with parameterization
data
The memory module is sealable with the 3RK3 central
unit or the control cabinet.
Description
• Confirm the acknowledgeable errors with this button.
• Refer to Chapter "Restoring factory settings
(Page 347)"
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006