GW Instek PEL-3111 - Page 219

APPENDIX
217
ALARM INPUT
10
Activates alarm with low TTL level signal input.
Pulled up the internal circuit to 5 V using 10 kΩ.
TRIG INPUT
11
When paused, clears the pause when a low level
TTL signal is applied for 10 μ s or longer.
Pulled down the internal circuit to A COM using
approx. 100kΩ .
A COM
12
Connected to the negative load input terminal on
the rear panel.
LOAD ON
STATUS
13
Turns on when load is on. Open collector output by
a photocoupler.*4
RANGE STATUS 1
14
Range status output*3. Open collector output by a
photocoupler.*4
RANGE STATUS 0
15
ALARM STATUS
16
Turns on when an alarm (OVP, OCP, OPP, OTP,
RVP, or UVP) is activated or when an
external alarm is applied. Open collector output by
a photocoupler.*4
STATUS COM
17
STATUS signal common for pins 13 to 16.
RESERVED
18
RESERVED.
SHORT SIGNAL
OUT
19
Relay contact output (30 VDC/1 A)
SHORT SIGNAL
OUT
20
*1
Valid only when the front panel settings are
H range.
*2
RANGE CONT 0
RANGE CONT 1
H range
1
1
M range
1
0
L range
0
1
*3
RANGE STATUS 0
RANGE STATUS 1
H range
OFF
OFF
M range
OFF
ON
L range
ON
OFF
*4
The maximum applied voltage of the photocoupler
is 30 V; the maximum current is 8 mA.