We have compiled a list of procedures that you may find useful as you are evaluating or using any of our products. Product manuals and sample software may also be downloaded from this section of the site.

Connecting digital inputs

The PRT232 can accept digital connections or switch contacts at J1 and J4. Connecting switches is simple: just wire the switch contacts directly to the pins.
Connecting to a digital electronic device is almost as easy, but you must take care to observe the correct polarity of inputs. In the diagram above, the "-" terminals are digital Ground and the "+" terminals are the output signal.
J1 uses an internal 820 ohm pullup resistor and is designed to accept open-collector outputs.

An open-collector is used when the signal may have to travel a long distance. It gives the system designer the option of using more current to determine the HIGH or LOW (ON/OFF) state of the line and makes for a cleaner, more noise free connection.

PRT232 documentation (RTF format)

CBL001 pinout (RTF format)

Executable and C++ source to communicate with PRT232 counters

consolePrt232.zip