Serial Output Board Configuring - VETEC P1001 Series Manual

Serial output board configuring

The only board you may need to make adjustments to is the RS485 output option board.
You can identify it as an RS485 board, because IC4 will be missing.
If the display is at the end of the data cable, you will need to fit the 120 Ohm termination
jumper.
If you have several addressed displays sharing a dataline, and find that you occasionally
see errors in communication, it may be necessary to fit the line bias jumpers as shown
below. This should only be done on the furthest display from the data receiver, so all three
jumpers should be fitted.The input/output solder switch must be open - this configures the
board as an output driver.
Bias +5V on Sig B
Bias 0V on Sig A
120 Ohm termination resistor
The RS232 board looks similar to the RS485 board, but requires no jumpers to be fitted at
any time. The input/output solder switch must be open - this configures the board as an
output driver.
You can identify it as an RS232 board, because IC3 will be missing.
6
RS485 Version (IC4 missing)
9122-0670 P4
IC4
IC3
RS232 Version (IC3 missing)
9122-0670 P4
IC4
IC3
Solder Switch must be Open
Solder Switch must be Open