GW Instek PSU 40-38 - External Operation and Status Monitoring

ANALOG CONTROL
137
External Operation and Status Monitoring
Background
The analog control connector can also be used to
monitor the status operation and alarm status of
the instrument.
The pins are isolated from the power supply
internal circuitry by photo couplers. Status Com1
(Pin 1) and Status Com2 (Pin 5) are photo coupler
emitter outputs, whilst pins 2~3, 14~17 are photo
coupler collector outputs.
A maximum of 30V and 8mA can be applied to
each pin. The Status Com pin is floating with an
isolation voltage of 60V.
Pinout
Name and Pin
Description
STATUS
COM1
1
Common (photo coupler
emitter) for status signals 2, 3,
14, 15 and 16.
CV STATUS
2
Low when CV mode is active.
CC STATUS
3
Low when CC mode is active.
ALM
STATUS
14
Low when any of the
protection modes are tripped
(OVP, OCP, Sense_ALM,
OTP_M, AC Fail, OTP_S,
Fan_Fail, HW_OVP, and
Shutdown). Active low.
PWR ON
STATUS
15
Active low.
OUT ON
STATUS
16
Low when the output is on.
Schematic
Pins 2, 3, 14, 15, 16
1 (Status COM1)