1 NB Overview 1-2 Part Names and Functions z Serial Port COM1 • NB5Q/NB7W/NB10W-TW …… B 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: 1 * Pins 4 and 5 are not used, thus not compliant with RS or CS functions. 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 …… B NB3Q-TW …… B has only 1 serial port COM1, and this port supports communication (non-isolated) based on 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: * Pins 4 and 5 are not used, thus not compliant with RS or CS functions.
NB-series Programmable Terminals Startup Guide Manual(V109) 1-7 Pins Signals I/O Functions 1 NC - - 2 SD O Sending data 3 RD I Receiving data 4 RS(RTS) O Request to send* 5 CS(CTS) I Clear to send* 6 DC+5V - DC+5V output (Max. current: 250mA) 7 NC - - 8 NC - - 9 SG - Signal ground Precautions for Safe Use Pins Signals I/O Functions RS-232C RS-485 RS-422A 1 SDB+ I/O - - Sending data(+) 2 SD O Sending data - - 3 RD I Receiving data - - 4 RS(RTS) O Request to send* - - 5 CS(CTS) I Clear to send* - - 6 RDB+ I/O - RS485B Send/Receive data(+) Receiving data(+) 7 SDA- I/O - - Sending data(-) 8 RDA- I/O - RS485A Send/Receive data(-) Receiving data(-) 9 SG - Signal ground