Moxa IA261-I-CE [20/24] Connecting to a serial device

IA260 Hardware User’s Manual Hardware Connection Description

Connecting to a Serial Device

Use properly wired serial cables to connect the IA260 to serial devices. The serial ports of the

IA260 use male DB9 connectors. The ports can be configured by software for RS-232, RS-422, or

2-wire RS-485. The precise pin assignments are shown in the following table:

Male DB9 Port RS-232/422/485 Pinouts

12345

6789

Pin RS-232 RS-422

RS-485

(4-wire)

RS-485

(2-wire)

1 DCD TxDA(-) TxDA(-) ---

2 RxD TxDB(+) TxDB(+) ---

3 TxD RxDB(+) RxDB(+) DataB(+)

4 DTR RxDA(-) RxDA(-) DataA(-)

5 GND GND GND GND

6 DSR --- --- ---

7 RTS --- --- ---

8 CTS --- --- ---

Connecting to the DI/DO

The IA260 has an 8-ch digital input and 8-ch digital output. The digital input channels and digital

output channels are located on the top side of the unit in a terminal block. The pinouts for the I/O

are shown in the figure.

Digital Input and Output Channel

(10-pin Terminal Block)

Additional wiring instructions are given below.

3-5