Safety Output Function; Output Double Wiring Function - Mitsubishi Electric MELSEC iQ-RX40NC6B Application User's Manual

10.3

Safety Output Function

Output double wiring function

This function turns output wiring into double wiring. With double wiring, output signals on each side are verified so that when
one side fails, safety outputs can be turned off.
Y0
Electromagnetic
contactor
RY40PT5B(Main)
COM
0V
Double wiring combination
For double wiring, perform wiring on a terminal with the same terminal number in both the RY40PT5B (Main) and the
RY40PT5B (Sub).
Ex.
For example, to perform double wiring on the terminal with terminal number Y00 in the RY40PT5B (Main), the terminal with
terminal number Y00 in the RY40PT5B (Sub) is used.
Diagnostic functions to detect output errors
An output error can be detected with the following diagnostic functions.
Diagnostic function
Output dark test function
Output read-back function
Double output combination
When the safety output (SA\Y) is ON, a double output turns on the corresponding output terminals in both the RY40PT5B
(Main) and the RY40PT5B (Sub).
Safety output (SA\Y)
OFF
ON
24VDC
Diagnostics
Outputs test pulses to turn off the outputs that are on and diagnoses contacts
including external devices for failure.
Reads back the output results for diagnosis to see if the output signals are
output correctly.
Output terminal status
Y in the RY40PT5B (Main)
OFF
ON
Y0
Electromagnetic
contactor
RY40PT5B(Sub)
COM
24VDC
0V
Y in the RY40PT5B (Sub)
OFF
ON
Reference
Page 177 Output dark test function
Page 179 Output read-back function
10 FUNCTIONS
10.3 Safety Output Function
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