QVS IC-485SI user manual Function Overview, Table Of Contents

		TABLE OF CONTENTS
1 FUNCTION OVERVIEW			1
	l-l	Introduction	1
	l-2	Specifications	2
2	INSTALLATION		3
	2- 1 Installation Procedure		3
	2-2 Switch Function Description		4
3	OPERATION		6
	3-l Point-to-Paint/4-Wire Full Duplex		8
	3-2 Point-to-Paint/2-Wire Half Duplex		9
	3-3 Multidrop/4-Wire Full Duplex		10
	3-4 Multidrop/2-Wire Half Duplex		11
	3-5 Simplex/Transmit, Receive Only		12
	3-6 Monitoring (for IC-485s only)		13
4	OTHERS		14
4- 1 Terminal Block Definition			14
	4-2 Self Test		15
APPENDIX A
Trouble Shooting			16
RS-232 DCE/DTE Description			17
Preventing Radio & TV Interference			18

FUNCTION OVERVIEW IC-485S/IC-485SI

1 FUNCTION OVERVIEW

l-l INTRODUCTION

The IC-485S and IC-485SI are a series of a bi-di- rectional interface converters for RS-232 and RS-

485.The IC-485SI has built-in isolators for high voltage (2OOOV) protection. With the IC-485 series, ic-485s & IC-485SI, it provides Point-to-Point, Multidrop and Simplex operations. The IC-485s provides an extra Monitoring function.

The IC-485 can be powered from the following two ways:

1)a DC 9V, 2OOmA power adapter

2) the pin #9 of the RS-232 connecter

Two slide switches are used to configure its op- eration mode, contention control, and assignment of the RS-232. Following figure is the IC-485’s exter- nal view.

DB-85 Female

Terminal Block

RJ-ll(ICG485S)

GND TAB(G485SI)

Figure l-l External View

User’s Manual 1