Ax350_04a_oi_e.doc / May-18
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3.5
Control Inputs
The three control inputs at terminal 10, 11 and 12 have HTL PNP characteristics.
In the COMMAND MENU the programmable functions for the control inputs can be assigned. Available
functions are: reset the display value, display switching, locking the touch screen or release the lock
function of the control or relay outputs.
Wiring of the control inputs:
Unconnected control inputs are always “LOW”.
All inputs are designed to receive impulses from an electronic impulse source.
Notice for mechanical switching contacts:
When exceptionally mechanical contacts are used, please connect an external capacitor between GND
(-) and the corresponding input (+). A capacity of 10 µF will reduce the input frequency to
20 Hz and miscounting due to contact bouncing will be eliminated.
3.6
Analog Output (Option AO/AR)
A 16 bit analog output is available at terminal 13 and 14 / 15.
This output can be configured and scaled in the ANALOG MENU.
The following configuration is possible:
•
Voltage output:
-10 … +10 V
•
Current output:
0 … 20 mA
•
Current output:
4 … 20 mA
The analog output is proportional to the the reference source and is referenced to potential AGND.
AGND and GND are internally interconnected.
Important:
A parallel operation with voltage and current output at the analog output is not allowed.
