QVS Interface Converter IC-485S - Manual (Page 3)

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.
Terminal Block
Figure l-l External View
User’s Manual 1