Omron NT31 Operation Manuals page 47

Preparations at the NT31/NT31C
Rear ViewNotice
GR terminal
Grounding terminal to prevent
malfunction due to noise.
Power input terminals
Connect the power to the
NT31/NT31C at these
terminals.
Backlight unit (inside the cover)
Open the cover to reveal the backlight.
The backlight is off while the cover is
removed. Tighten the cover screw
securely.
Note
36
Battery cover
The battery is secured underneath this cover.
Reset switch (inside the cover)
Used to initializes all the statuses of the NT31/NT31C.
However, registered data such as screen data, and memory
switch settings, retain their statuses before initialization.
24V
DC
PRINTER
Serial port B connector
Connect the cable for connection to the host here. Depending on the
setting made at the NT31/NT31C system menu, either RS-232C or
RS-422A/485 may be used. This is a 25-pin connector.
It is not possible to use RS-232C and RS-422A/485 at the same time.
Printer connector
Connect the printer cable here. Output
conforms to Centronics specifications.
Confirm system safety before turning the power ON/OFF or resetting.
PORT B PORT A
Serial port A connector
Connect the cable for connection to the
host or Support Tool here. A bar code
reader can also be connected here. This
is a 9-pin connector for RS-232C use only.
Section 2-2
Expansion interface connector
(under the label)
When using an expansion
interface unit such as a memory
unit, peel off the label and
connect it here.
Warning label