Omron Programmable Terminals NT631 Setup Manual page 47

Names and Functions of Parts
Rear View
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.
Note
30
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.
Warning label
RESET
RDA
TRM
RDB
SDA
SDB
RSA
RSB
24V
+DC
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.
Printer connector
Connect the printer cable here.
Output conforms to Centronics
specifications.
Confirm system safety before turning the power ON/OFF or resetting.
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.
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.