Omron NB3Q-TW00B Setup Manual page 28

Precautions for Safe Use
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.
• NB3Q-TW
NB3Q-TW
RS-232C, RS-422 and RS-485, of which only 1 connection mode can be applied at one time. By
means of the RS-232C mode (PIN 2~5), it can be connected to a controller based on RS-232C,
and can also be used for downloading programs, as well as debugging for the product (connected
to a PC). While with the RS-422 or the RS-485 mode (PIN 1, PIN 6~8), only a PLC can be
connected.
The pins are defined as follows:
Serial Port COM2
• NB5Q/NB7W/NB10W-TW
Serial port COM2 is a 9-pin D-type socket port. This port supports RS-232C/RS-485/RS-422A
communication function.
The pins are defined as follows:
NB-series Programmable Terminals Setup Manual(V107)
B
B has only 1 serial port COM1, and this port supports communication based on
Pins Signals
1 SDB+
2 SD
3 RD
4 RS(RTS)
5 CS(CTS)
6 RDB+
7 SDA-
8 RDA-
9 SG
* Pins 4 and 5 are not used, thus not compliant with RS or CS functions.
B
Pins Signals
1 SDB+
2 SD
3 RD
4 Terminal R1
5 Terminal R2
6 RDB+
7 SDA-
8 RDA-
9 SG
WWW.NNC.IR
1 Part Names and Functions
Functions
I/O
RS-232C
I/O -
O PLC Sending data
I PLC Receiving data
O Request to send*
I Clear to send*
I/O - RS485B
Send/Receive
data(+)
I/O -
I/O - RS485A
Send/Receive
data(-)
- Signal ground
I/O
RS-232C
I/O -
O Sending data
I Receiving data
- - Terminal resistor 1
- - Terminal resistor 2
I/O - Send/Receive
data(+)
I/O -
I/O - Send/Receive
data(-)
- Signal ground
RS-485 RS-422A
- Sending data(+)
- -
- -
- -
- -
Receiving
data(+)
- Sending data(-)
Receiving
data(-)
Functions
RS-485 RS-422A
- Sending data(+)
- -
- -
Receiving
data(+)
- Sending data(-)
Receiving
data(-)
1
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