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4
DATA TRANSMISSION
4.1
Data transmission
Data is transmitted in serial asynchronous form in accordance with the standards referenced in
2.1 of IEC 61162-1/2. The first bit is a start bit and is followed by data bits, least-significant-
bit first, as illustrated by figure below.
The following parameters are used:
- baud rate:
- data bits:
- parity:
- stop bits:
D0 D1
Start
bit
Note: Baudrate is 4800 on IEC 61162-1 interfac and 38400 on IEC 61162-2 interface
4.2
Serial interface description
4.2.1
AIS port 1, 4,5 , I/O description
Port 1 are input only, Port 4-5 are both input/output
All ports have selectable baudrate, 4800/38400.
Simplified diagram of Linear Tech. LTC1535
Note 1: The cabling shall be designed in a way that stubs are avoided and kept as short as possible.
81983_TM_TR2600_I
1
4 800 / 38 400
8 (D7 = 0),
none;
1.
D2
D3 D4
D5
D6 D7
Data bits
Stop
bit
Inside TR-2600
External cables
B
2
Input
A
B
3
Output
A
Page 4-1
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