PMX_MULTI
User’s Manual
37
Basic Functions
Protection Functions and Alarms
This product is equipped with the following protection functions.
• Overvoltage protection (OVP)
(p.38)
• Overcurrent protection (OCP)
• Communication monitoring (WATCHDOG)
• Alarm input (ALARM IN)
Alarm occurrence and clearing alarms
Alarm occurrence
When the output is shut off by a protection function, an alarm occurs, and the PMX is set to the following
state.
• The output is turned off.
You can use the CONFIG settings to set the output state (CF08) for when OVP/OCP is activated
• The display area shows “ALARM” (red), the voltmeter shows “
AL
”, and the ammeter shows the cause
of the alarm.
When a CONFIG parameter is displayed, the cause of alarm is not displayed.
• An alarm signal is output.
When an alarm occurs, an alarm signal is output from pin 12 of the CONTROL TERMINAL.
Clearing alarms
Press ALM CLR (SHIFT + SET) or turn off the POWER switch. Fix the problem that caused the alarm, and
turn the POWER switch back on. When clearing an alarm with an alarm input (ALARM IN), turn the
POWER switch off once and then back on.
If you do not resolve the cause of the alarm, an alarm will occur again.
If an alarm still occurs even after you have resolved all the causes of alarms, the product may be malfunc-
tioning. Stop using it immediately, and contact your Kikusui agent or distributor.
Alarm signal
The output terminal is isolated from other terminals through an open collector photocoupler. The output-on
signals of CH1 to CH4 and the power-on signal share a common ground.
Maximum voltage: 30 V
Maximum current: 8 mA
12
13
CONTROL TERMINAL
ALM STATUS
STATUS COM
PMX
