4
【
Appearance and dimensions
】
Unit
（
mm
）
【
Power supply input
】
Front view
Vertical view
IT-ES3020-IU-4GS series top panel provided 4 bit power supply input terminal block, DC power supply input supported redundancy function,
provided PWR1 and PWR2 power input, can use for single, and can connect 2 separately power supply system, use 1 pair termina l block connect
the device at the same time. If one of the power system broke, the device can work un-interruptible. built-in over current protection, Reverse
connection protection. Voltage input range is 12
～
48VDC
（
terminal block defined as: V1-
、
V1+
、
V2-
、
V2+
）
.
Important notice:
1.
Power ON operation: first of all, insert power cable’s terminal block into device’s power port, then insert power supply plug into power source
2. Power OFF operation: First off all, unpin power plug, then strike the terminal block, please take care of operation sequence.
【
Relay connection
】
Vertical view Front view
The terminal block of relay is on top panel, it is a group of normally closed contact.
Configure power alarm open or close by DIP switch 2. After open power alarm function, if no alarm, it is in close status, if have any alarm, it is
