Description of the hardware
5.1 Description of the individual modules
Modular Safety System 3RK3
System Manual, 10/2008, 926 2530-02 DS 02
43
Structure of the 3RK3 Basic central unit
Front view 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
7,1,1,1,1
7,1,1,1,1
444/0)(
;;
'(9,&(
6)
5(6(7
,1,1,1,14
,1,1,1,14
5.$$
5.%DVLF
(9) Connection of PC / PG / communications
module
Terminal names of the 3RK3 Basic central unit
Terminal Meaning Description
T1 Test output for inputs IN1,
IN3, IN5, IN7
T2 Test output for inputs IN2,
IN4, IN6, IN8
Test outputs with different test signals
Connection for sensor contacts for detecting cross-
circuits
IN1 ... IN8 Safety-related sensor inputs Connection for safety sensors
Combinations for two-channel connection method:
IN1-IN2, IN3-IN4, IN5-IN6, IN7-IN8
Q1.1, Q1.2 Safety-related relay output Isolated, redundant output for connecting actuators
Q2 Safety-related solid-state
output
Redundant semiconductor output for connecting
actuators
L+ Power supply 24 V DC
M Ground Ground to 24 V DC
FE Functional ground Shielding, equipotential bonding
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