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: sales@iseg-hv.de
Tel ++ 49 (0)351 / 26 996 - 0
Bautzner Landstr. 23
http://www.iseg-hv.de
Fax ++ 49 (0)351 / 26 996 - 21
20
D - 01454 Radeberg/ Rossendorf
Table 5.1: Electrical wiring of the RS232 Interface
Signal
HV-PS
PC
Connection
Signal
RS-232
D-SUB-9
Internal
D-SUB-9
RS-232
D-SUB-9
RxD
2
2
RxD
2
TxD
3
3
TxD
3
GND
5
5
GND
5
4
─┐
4
4
6
─┤
6
6
8
─┘
8
8
USB
The USB interface is realized with a female USB-B connector on the back panel. Internally, the USB is implemented by a USB-
serial converter FTDI FT232R.
This device operates as a virtual serial port in a PC, and can be used with every program that supports a serial port, e. g. a
terminal program or LabVIEW.
Programming
The following description applies to both, RS-232 and USB interface.
The (virtual) serial interface is set to 9600 Bit/s, 8 Bit/character, no parity, 1 Stop-Bit.
The data transfer is character oriented, while the synchronization in the direction "Computer to HV PS unit” (Input direction) is
established by echoes. The transfer direction “HV-PS to computer“ (Output direction) is free running.
The command transfer uses ASCII characters. Commands are terminated by <CR><LF> ($0D $0A or 13 10).
A new command may be sent immediately after the last answer was completely received (including <CR><LF>). For com-
mands that don't return an answer, the simplest thing is to add *OPC? in EDCP instruction set:
Table 5.2: Programming serial interface
Instruction (with Echo)
:VOLT 500;:VOLT ON;*OPC?<CR><LF>
Answer
1<CR><LF>
5.3.2
Description of the CAN interface
Warning!
Turn off the device with mains switch before connecting/disconnecting the interface cable.
The connector (SUB D 9) for the CAN interface is located at the back panel of the module and has the following pinout:
Table 5.3: Pinout CAN connector
PIN
Signal
2
CAN_L (CAN Low)
3
CAN_GND
5
CAN_Shield
7
CAN_H (CAN High)
The operating and the command set is equivalent to the EDCP protocol, which is described in the manuals
CAN-Interface
Multi-Channel High Voltage Power Supply Module
EHS xxx and EDS xxx.
To control the device, the programs “IsegCANHVControl” or “iseg OPC Server” can be used.
