Terminal designations of the 4/8F‑RO expansion module
Terminal Meaning Description
Q1.1, Q1.2 Safety-related relay output Isolated output for connecting actuators
Q2.1, Q2.2 Safety-related relay output
Q3.1, Q3.2 Safety-related relay output
Q4.1, Q4.2 Safety-related relay output
Q5.1, Q5.2 Safety-related relay output
Q6.1, Q6.2 Safety-related relay output
Q7.1, Q7.2 Safety-related relay output
Q8.1, Q8.2 Safety-related relay output
L+ Power supply 24 V DC
M Ground Ground to 24 V DC
Interfaces of the expansion module 4/8F‑RO
Interface Meaning Description
X1 System interface Connection of central unit/expansion module
X2 System interface Connection of expansion module
Operator controls and displays of the expansion module 4/8F-RO
Element Meaning
SF/Q1 Group error / state of the relay output
Q2 ... Q8 State of the relay outputs
Connecting inputs and outputs
You will nd further information on connecting inputs and outputs in Chapter "Wiring rules for
inputs and outputs (Page 134)."
Description of the hardware
5.1 Description of the individual modules
SIRIUS 3RK3 Modular Safety System
Equipment Manual, 07/2020, NEB926253002000/RS-AC/006 109
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