QVS IC-485S Manuale Utente

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

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