Operating instructions AX460
10
7.4 Control inputs
On terminals 10, 11 and 12, three control inputs with HTL-PNP characteristic are
available�
These inputs can be configured in the COMMAND MENU and are used for
functions that can be triggered externally such as resetting the display value,
changing the display, locking buttons of the touch screen or releasing the latching
of control outputs�
Connection of the control inputs
Open control inputs are generally "LOW"�
The input stages are designed for electronic control signals�
Remark on mechanical switching contacts:
If mechanical contacts are to be used as pulse source, a standard, external
capacitor of about 10 μF must be connected to the terminals between GND (-) and
the corresponding input (+)� This damps the maximum input frequency to approx�
20 Hz and contact bouncing is suppressed�
7.5 Reference output
On terminal 8, a 10 V reference output is available� The max� load of this output
must not exceed 10 mA� This reference output can, for example, be used to
connect a potentiometer�