7
RS 232 INTERFACE INSTRUCTION MANUAL
Power Supply SPS 1000 can be also remotely controlled by the RS 232 C serial interface from a
personnel computer or by another device comprising this serial interface.
Connection procedure:
1. Connect CANON9 connector on the rear side of the power supply and computer serial port with a
serial cable.
2. Set-up serial port: 1200 baud, 8 bits, no parity, 1 stop bit.
Example: MODE COM1: 1200,N,8,1
3. Set remote control switch to position REMOTE.
4. Move disable OUTPUT switch to position ON.
5. Fully turn to the left both fine potentiometers for current and voltage.
6. Switch on power supply and send following ASCII string through serial port: "SZU90,0I11,00E" ,
after this string send character 0x0D (ENTER)
Meaning of each symbol:
S …beginning of message
Z…power supply switched ON (V…power supply switched OFF). Tu switch OFF power supply,
resp. his output, zero voltage and current shall be set.
U90,0 means setting voltage 90,0V (max. 99,9V)
I05,00 means setting current limit to 5,00 A (max. current range is up to approx. 12,5 A)
E…end of message
It is necessary to keep always the same string length. It means that needed voltage 5 V is entered
as U05,0 and current 0,5 A as I00,50.
After sending correct string is the requested voltage and current limit set on the power supply.
Power supply does not confirm message reception.
Wire connection of communication cable to connect to IBM PC compatible computer:
POWER SUPPLY
COMPUTER (CANON 9-pin)
XS1:2
XS2:3
XS1:5 XS2:5
XS2:4-----XS2:6
XS2:7-----XS2:8
Maximal distance between power supply and computer is 10m. (RS232 C)
