5.2. Manual control mode
While the unit is operated in manual control mode, RS232 read cycles are interpreted only. Commands are accepted, but do not
result in a change of the output voltage.
5.3. Specification of the RS232 interface
The data exchange is character based, the synchronization for the transfer direction PC to HV-source (input) is performed using
an echo. The data transfer to the PC (output) is asynchronous. Between two characters a programmable delay time is included to
allow the computer to receive and evaluate the incoming data. The default delay time setting is 3 ms.
INFORMATION
INFORMATION
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 at the PC side is
given in the table. The bridging on the PC side if a three-lead cable is used, is also given in table.
Signal - RS 232
PC - DSUB9
PC - DSUB25
Connection - 3-lead cable
RxD
2
3
TxD
3
2
GND
5
7
4
20
┐
6
6
┤
8
5
┘
Table 4: Pin assignment
EHQ High Voltage Power Supply series | Last changed on: 11.05.2020 |
www.iseg-hv.com
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