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7000 Bus Converter User Manual (version 1.2,Feb/2003, 7PH-006-10) --------------- 64
4. I-7551
4.1 I-7551 Pin Assignment and Specifications:
Introduction
The I-7551 Photo coupler provides a complete
full-duplex (including control signal) electrical
isolation channel between two RS-232 devices.
This isolation is an important consideration if a
system uses different power sources, has noisy
signals or must operate at different ground
potentials.
The I-7551 has the option of reconfiguring which
control signal is used. CTS can be selected
instead of DCD and RTS instead of DTR.
The I-7551 incorporates two DC-to-DC
converters; the isolation site of I-7551 is located
in the input and output interface circuit. In other
words, I-7551 is three- way isolation RS-232-to-
RS-232 converter.
Specifications
Input:
RS-232 (TxD, RxD, CTS, RTS, GND or TxD, RxD,
DCD, DTR, GND)
Output:
RS-232 (TxD, RxD, CTS, RTS, GND or TxD, RxD, DCD,
DTR, GND)
Output Port: Three RS-485.
Three-way Isolation voltage: 3000VDC
2500Vrms Channel to Channel isolation
Power consumption: 1.5 W max.
Storage temperature: -25℃ to +80℃
I-7551
RS-232 to RS-232 Converter
One channel RS-232 Input
One channel RS-232 Output
( RS-232_OUT )
( RS-232_IN)