
Connection KeTop
T50VGA
36
User's Manual, Version: 1.3
© KEBA 2007
4.8.2 General
information
about the RS-422-A interface
z
The A terminal of the generator shall be negative with respect to the B
terminal for a binary 1 (MARK or OFF) state.
z
The A terminal of the generator shall be positive with respect to the B
terminal for a binary 0 (SPACE or ON) state.
To identify the lines, the voltage between the lines A and B can be meas-
ured by means of a voltameter.