Moxa IA3341-LX [17/20] Connecting to a serial device

IA3341 Hardware User's Manual Hardware Connection Description

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Connecting to a Serial Device

Use properly wired serial cables to connect the IA3341 to serial devices. The serial ports of the IA3341 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

RS-232

RS-422

RS-485 (4-wire) RS-485 (2-wire)

DCD TxDA(-)

TxDA(-) –

RxD TxDB(+)

TxDB(+) –

TxD RxDB(+)

RxDB(+) DataB(+)

DTR RxDA(-)

RxDA(-) DataA(-)

GND GND GND GND

DSR – – –

RTS – – –

CTS – – –

Connecting to the DI/DO

The IA3341 has an 4-ch digital input and 4-ch digital output. The digital input channels and digital output

channels are located on the front 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)

DI x 4

DO x 4

Additional wiring instructions are given below.

Digital Input Wiring

Dry Contact

Wet Contact

Note: If you are using wet contacts, you must connect “COM” to power.