User`s manual

I94GC-IA

Serial port Connector (JCOM1A & JCOM1B)

The motherboard has a Serial Port Connector for connecting RS-232 Port.

Assignment

1 Carrier detect

2 Received data

3 Transmitted

4 Data terminal

5Si

nal

round

6 Data set read

7 Request to

send

8 Clear to send

9 +5V (JCOM1A)

Ring (JOCM1B)

JCOM1A

JCOM1B

10 NC

RS-232/422/485 Headers

The headers determine that JCOM1A belongs to RS-232(Default), 422, or 485.

JSEL1

RS-232 RS-422 RS-485

1-3 3-5 3-5

2-4 4-6 4-6

7-9 9-11 9-11

8-10 10-12 10-12

JSEL2

1-2 RS-232

3-4 RS-422

5-6 RS-485

JSEL2

JSEL1

Note: Please notice Pin 9 of JCOM1A and of JCOM1B. JCOM1A: +5V;

JCOM1B: Ring indicator.