S p e z i a l e l e k t r o n i k G m b H
iseg Spezialelektronik GmbH
Email: [email protected]
Phone ++ 49 351 / 26 996 - 0
Bautzner Landstr. 23
http://www.iseg-hv.com
Fax
++ 49 351 / 26 996 - 21
D - 01454 Radeberg / Rossendorf
Germany
6
Pin assignment 96-pin connector on the flip side
A3 B3 C3
+24V
A5 B5 C5
GND
A7 B7 C7
-24V
A9
@GND
B9
@RXD
potential free
C9
@TXD
Specification RS232 interface
The data exchange is character based, synchronisation between the computer and the supply (input) is
performed using echo. The data transfer to the computer (output) is asynchronous, breaks between two
characters, programmable of the break time, allow the computer to receive and evaluate the incoming data. Break
time is setting 3 ms at works.
The hardware setting of the RS232 interface is 9600 bit/s, 8 bit/character, no parity, 1 stop bit.
Signal transmission is performed potential free via the @RxD and @TxD, relative to @GND.
The pin assignment when a PC is used is given in table 1. Control signals to be bridged on the PC side when a
three lead cable is used, are given in table 1 also.
Syntax
The commands are transmitted in ASCII. The end of command is formed by the sequence
<CR> <LF> ( 0x0D 0x0A , 13 10 respectively). Leading zeroes can be omitted on input, output is in fixed
format.
Table 1:
Signal
PC
PC
Connection
RS 232
DSUB9
DSUB25
3-lead cable
Signal pin assignment
RxD
2
3
TxD
3
2
GND
5
7
4
20
6
6
8
5
