IDEC FS1A Controller - Manual (Page 106)

LOGIC
5-58
●External device monitor inputs: X14 and X15 (T14 and 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
(X14-T14)
Safety output 1
(Y0, Y1) Function name External device monitor input
External device monitor input 2
(X15-T15)
Safety output 2
(Y2, Y3) Symbol
External Device
Monitor
EDM
Description of
operation
This function diagnoses the
status of devices connected to a
target safety output.
Detail information Logic functions (5-326)
Warning
Safety check signals (pulses signals) are sent from the drive terminals (T14, T15) to diagnose external
devices and monitor circuits. Safety checks signal 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.