Description of the hardware
5.1 Description of the individual modules
Modular Safety System 3RK3
52 System Manual, 10/2008, 926 2530-02 DS 02
Structure of the expansion module 4F-DO
Front view No. Meaning
(1) Removable terminal block D
(2) Removable terminal block C
(3) Interface X2
(4) Inscription label
(5) Removable terminal block A
(6) Removable terminal block B
(7) Display LEDs
6)44
44
444
/00
40
5.$$
)'2
(8) Interface X1
Terminal designations of the expansion module 4F-DO
Terminal Meaning Description
Q1, Q2, Q3,
Q4
Safety-related solid-state
outputs
Redundant semiconductor outputs for connecting
actuators
L+ Power supply 24 V DC
M Ground Ground to 24 V DC
Interfaces of the expansion module 4F-DO
Interface Meaning Description
X1 Interface Connection of central unit/expansion module
X2 Interface Connection of expansion module
Displays of the expansion module 4F-DO
Element Meaning
SF/Q1 Group error / solid-state input
Q2, Q3, Q4 Solid-state outputs
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