Tri-M Systems HE104 - Manual (Page 27)

23 June 2005
HE104MAN-V8 Manual
Tri-M Engineering Tel: 800.665.5600, 604.945.9565
1407 Kebet Way, Unit 100 Fax: 604.945.9566
Port Coquitlam, BC V3C 6L3 E-mail: [email protected]
Canada Web site: www.tri-m.com
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A variety of temperature sensors can be connected including thermistors and conditioned sensors
such as LM35s. The LM35 series is particularly nice because their output voltage is directly
proportional to temperature (ie 10mV/C or 10mV/F). In any case, the OEM can “experiment” to
determine what works best in their application.
3. Programming Cable:
The programming cable is plugged into the connector CN4 on the PSU and the other end into the
25pin DB parallel port connector on a PC. The programming cable has the following connections:
CN4-1
No connection
CN4-2 Connect to pin 25 on parallel port
CN4-3 Connect to pin 11 parallel port
CN4-4 Connect to pin 2 parallel port
4. Download and Edit Software:
All programs for the PM104 are written in a “Control Basic” program language and are saved into
an ASCII file with a “BAS” extension. Any text editor can be used to create, edit and save these
programs. The Download program called “Stamp.exe” also has simple editing capabilities.
After the program cable is connected between the PSU and the parallel port, the PSU unit can be
turned on, thus providing power to the PM104 unit. The Download program Stamp. Exe is started
by typing from DOS, STAMP.EXE. The program to be downloaded is opened by pressing the
keys “ALT” and “L” simultaneously. Using the arrow keys select the desired file and press
ENTER key. To download the program press the keys “ALT” and “R” simultaneously. If the cable
is properly connected and power applied the screen will show a horizontal bar graph indicating
the percent of program downloaded. The red area of the bar graph is the portion used and the
remainder is program space available.
5. Program Command and Syntax:
Please refer to the Adobe files BSBOOK1.PDF and BSBOOK2.PDF.
6. Adjusting the BC104 Float Limits:
When a PC/104 power supply is equipped with a BC104 and a PM104 the BC104 has a Float
Voltage Adjust potentiometer. However, the Current Limit Adjust potentiometer is not installed
and is controlled via the PM104.
Using a small screwdriver (flexible nylon works best), turn the potentiometer until the desired float
voltage is obtained. No load should be present when adjusting.