Omron NT631 Operation Manuals page 45

Preparations at the NT631/NT631C
Rear ViewNotice
Serial port B terminal block
Connect the cable for
RS-422A/485 connection to the
host here. Depending on the
setting made at the NT631/NT631C
system menu, communications
through RS-422A/485 are
available.
It is not possible to use this
terminal block and the serial port B
connector (9-pin) at the same time.
GR terminal
Grounding terminal to prevent
malfunction due to noise.
Power input terminals
Connect the power to the
NT631/NT631C at these
terminals.
Battery cover
The battery is secured
underneath this cover.
Notice
36
Reset switch (inside the cover)
Used to initializes all the statuses of the NT631/NT631C.
However, registered data such as screen data, and memory
switch settings, retain their statuses before initialization.
RESET
RDA
TRM
RDB
SDA
SDB
RSA
RSB
24V
+DC
Printer connector
Connect the printer cable here. Output
conforms to Centronics specifications.
Confirm system safety before turning the power ON/OFF or resetting.
Warning label
PRINTER 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.
Serial port B connector
Connect the cable for RS-232C connection to the host here. Depending
on the setting made at the NT631/NT631C system menu,
communications through RS-232C are available. This is a 9-pin
connector for RS-232C use only.
It is not possible to use this connector and the serial port B terminal block
at the same time.
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.