4. I-7551 : RS-232 to RS

4. I-7551 : RS-232 to RS
4. I-7551 : RS-232 to RS-232 Converter
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 DSR 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-toRS-232 converter.
Specifications
z Input:
RS-232 (TxD, RxD, CTS, RTS, GND or TxD, RxD,
DSR, DTR, GND)
z Output:
RS-232 (TxD, RxD, CTS, RTS, GND or TxD, RxD, DSR,
DTR, GND)
z Three-way Isolation voltage: 3000VDC
z Optical isolation: 2500V rms
z Communication speed: 115.2K bps, Max
z Distance Max: 15Meters
z Power requirements: +10V dc ~ +30V dc
z Power consumption: 1.5 W max.
z Storage temperature: -25к to +75к
z Humidity: 5~ 95%
7000 Bus Converter User’s Manual (Version 1.8 Jan/2006, 7PH-006-18) --------------- 56
4.1.1 The I-7551 System Network Configuration:
x Multiple Baud Rate
x Multiple Data Format
4.1.2 The I-7551 Block Diagram:
7000 Bus Converter User’s Manual (Version 1.8 Jan/2006, 7PH-006-18) --------------- 57
4.1.3 I-7551 has two different output types.
Selecting the I-7551 output type.
NOTE: The type1 and type2 couldn’t be used simultaneously, which
means that you can only select 1 type to output.
Type 1:
Input :TxD, RxD, CTS, RTS, GND. Output :TxD, RxD, CTS, RTS, GND.
Type 2:
Input :TxD, RxD, DSR, DTR, GND. Output : TxD, RxD, DSR, DTR, GND.
Type1 and Type2 Jumpers settings:
NOTE: RXD and TXD are permanent setting.
For type 1: Set the JP1 jumper to positions 2 and 3.
Set the JP2 jumper to positions 2 and 3.
3
2
1
JP1
3
2
1
Type 1:
For Pin8 “CTS”
Default setting
IN
GND_IN
CTS_IN
TXD_IN
RTS_IN
RXD_IN
Type 1:
For Pin7 “RTS”
Default setting
JP2
OUT
1
6
2
7
3
8
4
9
5
5
9
4
8
3
7
2
6
1
RXD_OUT
RTS_OUT
TXD_OUT
CTS_OUT
GND_OUT
DB9_Male
DB9_Female
For type 2: Set the JP1 jumper to positions 1 and 2.
Set the JP2 jumper to positions 1 and 2.
3
2
1
3
2
1
Type 2:
For Pin6 “DSR”
JP1
Type 2:
For Pin4 “DTR”
JP2
IN
GND_IN
DTR_IN
TXD_IN
RXD_IN
DSR_IN
OUT
1
6
2
7
3
8
4
9
5
5
9
4
8
3
7
2
6
1
DB9_Female
DSR_OUT
RXD_OUT
TXD_OUT
DTR_OUT
GND_OUT
DB9_Male
7000 Bus Converter User’s Manual (Version 1.8 Jan/2006, 7PH-006-18) --------------- 58
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