Mitsubishi Electric FR-A800 Series Beginner's Manual page 37

Connections
Type
Never connect terminals PC and SD to one another! These terminals are the common terminals for the control
inputs when you use source logic (PC, factory default for CA types) or sink logic (SD, factory default for FM
types).
Frequency Inverters - Beginner's Guide
Terminal Function
S1 Safety stop input (Channel 1)
S2 Safety stop input (Channel 2)
Safety stop input terminal
SIC
common
Safety monitor output (open
SO
collector output)
Safety monitor output
SOC
terminal common
Description
Used for the safety stop input signal for the safety relay module.
Input resistance 4.7 kΩ
Input current 4–6 mA DC
Common terminal for terminals S1 and S2.
Indicates the safety stop input signal status.
Common terminal for terminal SO.
Control terminals
3 - 5