Mitsubishi Electric MELSEC iQ-R Series User Manual page 48

■Combination for double wiring
Use the following combinations of input terminals for double wiring to the safety remote I/O module.
Combination of input terminals
X0, X1
The following table lists the relation of input terminals (X) and safety remote inputs (SA\X).
Safety remote input (SA\X)
SA\X0
SA\X1
to
SA\XA
SA\XB
Single wiring function
This function can connect input devices with single wiring.
T0
Connecting input devices with single wiring brings the safety category to SIL2/CAT2 PLd.
Diagnostic functions to detect input errors
Input errors can be detected by using the following diagnostic functions.
Diagnostic function
Double input discrepancy detection
function
Input dark test function
7 FUNCTIONS
46
7.1 Input Function
X2, X3 X4, X5
NC
X0
Safety remote I/O module
Description
Detects the discrepancy of double input signals.
Outputs test pulses to turn off the external input signals (X0 to XB) that are on
for a short time and diagnoses contacts including external devices for failure.
X6, X7 X8, X9
Input terminal (X)
X0
X1
to
XA
XB
XA, XB
Reference
Page 53 Double input
discrepancy detection function
Page 55 Input dark test function