1-7
1 List for All PLCs Supported by NB Series
NB-series Programmable Terminals Host Connection Manual (V108)
1-2 Definition and Description of
Serial Port COM
1
1-2 Definition and Description of Serial
Port COM
Serial Port COM1
• NB5Q/NB7W/NB10W-TWB
Serial port COM1 is a 9-pin D-type socket port. This port supports RS-232C communication
function, making it connectable to a controller which features RS-232C function, and it can also be
used for downloading programs or debugging for the product.
The pins are defined as follows:
When using the No. 6 pin of the serial communications port COM1 connector for a voltage of
DC+5V, make sure the supply equipment’s current capacity is below 250 mA before using it. The
DC+5V voltage output of the NB Unit is +5V±5%, and the maximum current is 250 mA.
* Pin 4 and 5 are not used, thus not compliant with RS or CS function.
NB5Q/NB7W/NB10W-TWB
Pins COM1 Signals
1NC
2SD
3RD
4 RS(RTS)*
5 CS(CTS)*
6DC+5V
7NC
8NC
9SG
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