GW Instek PPH-1503 - Manual (Page 58)

PPH-1503 User Manual
58
External Relay
Connection There are two ways to connect an external relay to
the unit:
1. Using the the +5VDC relay output to drive an
external relay. Ensure the current doesn’t
exceed 150mA.
+5VDC
OUT
OUT
IN
GND
Power Supply
Relay
Control
Relay
Internal
Source +5VDC
±5%
Protection Diode
Warning: Do not short the 5VDC terminal to the
chasis, earth or to the control port GND, otherwise it
may damage the unit.
2. Using an external power source to drive the
external relay. The voltage of the source cannot
exceed 15V and the current cannot exceed
150mA.
+5VDC
OUT
OUT
IN
GND
Power Supply
Relay
Control
Relay
Internal
Source +5VDC
±5%
Protection Diode
External Source
15VDC Max