RS-232 to RS-232 Optical Isolator Model 232OP4.pdf

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232OP41795 - pg. 1/1

RS-232 to RS-232 Optical Isolator

Model 232OP4

Document No. 232OP41795

The Model 232OP4 optically isolates four RS-232 lines. The isolator is provided

with a DB25 male connector on one side and a DB25 female on the other side. Signals

pass through the isolator as follows:

DB-25 MALE SIDE DB-25 FEMALE SIDE

Pin Number Pin Number

2 Input ......................TD........................2 Output

3 Output................... RD........................3 Input

4 Input .................... RTS.......................4 Output

5 Output.................. CTS.......................5 Input

This isolator can be used at data rates to 38.4k baud. The RS-232 lines marked RTS and CTS above can also be used

to isolate data lines. Each side of the isolator requires a 12VDC power supply at about 30 ma. Two Model 232PS power

supplies can be used for this purpose. Remote power can be brought into each side of the isolator on pins 12 (GND) and 11

(+12VDC). When remote power supplies are used, their grounds must be isolated to maintain the isolation of the RS-232

signals.

© B&B Electronics -- Revised April 1995

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