IS5 COMMUNICATIONS iSC2 Series, User Manual

Page: 10 / 16

iSC2 User
’s Manual
iS5 Communications Inc.
10
Position State Notes
1 ON RS232 to fiber
2 OFF RS232-to-RS485/422 conversion
3 ON/OFF Full-duplex (485-4W or 485-2w)
4 OFF No 120 Ohm termination
5 OFF
Fiber repeater
Note: Position 3 is applied to RS485 only
RS422/RS485 Device
Position State Notes
1 OFF
RS232 to fiber
2 OFF RS232-to-RS485/422 conversion
3 ON Full-duplex
4 OFF No 120 Ohm termination
5 OFF
Fiber repeater
In this mode serial data is converted directly into light signal, and transmitted over multi-mode fiber
optics. The serial standard is selected by position 1 of the DIP switches: OFF (default) is for
RS485/RS422, and ON is for RS232. Position 2 should be OFF for serial to fiber conversion. Position
6-10 should be configured if RS485 communications are used, in order to have the appropriate turn-
around timer shown below selected. Positions 6-10 do not impact communications in full-duplex mode.
Baud Rate (bps) DIP6 DIP7 DIP8 DIP9 DIP10
1200
– 2400
ON OFF OFF OFF OFF
4800
– 9600
OFF ON OFF OFF OFF
14400
– 19200
OFF OFF ON OFF OFF
28800
– 38400
OFF OFF OFF ON OFF
57600
– 115200
OFF OFF OFF OFF ON