Omron NT21 - SETUP MANUAL 10-2001 Setup Manual page 26

Names and Functions of Parts
Rear View
Expansion interface connector
When using an Expansion Interface Unit
such as a Memory Unit, connect it here.
Power input terminals
Connect the power to the
NT21 at these terminals.
14
GR terminal
Grounding terminal to
prevent malfunction
due to noise.
Serial port A connector
Connect the cable for connection to the host or NT Support
Tool here. A bar code reader can also be connected here.
This is a 9-pin connector for RS-232C only.
Note Before turning the power ON/OFF, confirm system safety, otherwise the system
may operate unpredictably.
Battery cover
There is a battery holder beneath this cover. The
battery is optional (sold separately) and is not
installed when the NT21 is shipped.
Serial port B connector
Connect the cable for connection to the
host here. An NS-AL002 Link Adapter can
be connected directly to this port. This is a
9-pin connector for RS-232C only.
Section 2-2