User Manual

7000 Bus Converter User’s Manual (Version 1.8 Jan/2006, 7PH-006-18) --------------- 56

4. I-7551 : RS-232 to RS-232 Converter

4.1 I-7551 Pin Assignment and Specifications:

Introduction

The I-7551 Photo coupler provides a complete

full-duplex (including control signal) electrical

isolation channel between two RS-232 devices.

This isolation is an important consideration if a

system uses different power sources, has noisy

signals or must operate at different ground

potentials.

The I-7551 has the option of reconfiguring which

control signal is used. CTS can be selected

instead of DSR and RTS instead of DTR.

The I-7551 incorporates two DC-to-DC

converters; the isolation site of I-7551 is located

in the input and output interface circuit. In other

words, I-7551 is three- way isolation RS-232-to-

RS-232 converter.

Specifications

z Input:

RS-232 (TxD, RxD, CTS, RTS, GND or TxD, RxD,

DSR, DTR, GND)

z Output:

RS-232 (TxD, RxD, CTS, RTS, GND or TxD, RxD, DSR,

DTR, GND)

z Three-way Isolation voltage: 3000VDC

z Optical isolation: 2500V rms

z Communication speed: 115.2K bps, Max

z Distance Max: 15Meters

z Power requirements: +10V dc ~ +30V dc

z Power consumption: 1.5 W max.

z Storage temperature: -25℃ to +75℃

z Humidit

: 5~ 95%