Siemens Sirius 3RK3 System Manual page 45

Structure of the 3RK3 Basic central unit
Terminal names of the 3RK3 Basic central unit
Terminal
T1
T2
IN1 ... IN8
Q1.1, Q1.2
Q2
L+
M
FE
Modular Safety System 3RK3
System Manual, 10/2008, 926 2530-02 DS 02
Front view
Meaning
Test output for inputs IN1,
IN3, IN5, IN7
Test output for inputs IN2,
IN4, IN6, IN8
Safety-related sensor inputs Connection for safety sensors
Safety-related relay output
Safety-related solid-state
output
Power supply
Ground
Functional ground
5.1 Description of the individual modules
No. Meaning
(1) Removable terminal block D
(2) Removable terminal block C
(3) Connection to expansion module
(4) RESET button
(5) Removable terminal block A
(6) Connection of memory module
(7) Inscription label
(8) Display LEDs
(9) Connection of PC / PG / communications
module
Description
Test outputs with different test signals
Connection for sensor contacts for detecting cross-
circuits
Combinations for two-channel connection method:
IN1-IN2, IN3-IN4, IN5-IN6, IN7-IN8
Isolated, redundant output for connecting actuators
Redundant semiconductor output for connecting
actuators
24 V DC
Ground to 24 V DC
Shielding, equipotential bonding
Description of the hardware
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