IDEC FS1A Controller - Manual (Page 311)

LOGIC
5-263
Chapter 5
●External device monitor inputs: X12 to X15 (T12 to T15)
External device monitor inputs are used to diagnose the status of devices connected to safety
outputs.
Intended inputs
(Terminal names) Target safety
outputs (Terminal
names) Function
External device monitor input 1
(X12-T12)
Safety output 1
(Y0) Function name External device monitor input
External device monitor input 2
(X13-T13)
Safety output 2
(Y1) Symbol
External Device
Monitor
EDM
External device monitor input 3
(X14-T14) Safety output 3
(Y2) Description of
operation This function diagnoses the
status of devices connected to
a target safety output.
External device monitor input 4
(X15-T15)
Safety output 4
(Y3) Detail
information Logic functions (5-326)
Warning
Safety check signals (pulses signals) are sent from the drive terminals (T12 to T15) to diagnose
external devices and monitor circuits. Safety check signals can not be used as a power supply for
connected devices.
Note. If there are unused safety outputs, connect the intended external device monitor terminals
(Xn) to the corresponding drive terminals (Tn). If they are not connected, the SafetyOne
detects an input monitor error. As the result, the error LED displays a “1” and the unit
changes to the Protection state.