55
5-7-6. Alarm function using external contacts
It is possible to bring the PSF Series power supply unit into the alarm
status forcedly by short-circuiting the external contacts. Output is
turned off and
“HARD” is displayed on the 7-segment LED when the
PSF Series power supply unit is brought into the alarm status. Cut off
input power or shut off the POWER switch to cancel the alarm status.
CHA
：
Pins 20 and 22 (COM)
CHB
：
Pins 11 and 13 (COM)
1
2
25
26
EXT CONT 「J3」
Negative output
terminal of CHA
1
2
25
26
EXT CONT 「J3」
Negative output
terminal of CHB
CHB
External alarm input
CHA
External alarm input
Fig.5-18 External Alarm Input Terminals
