Digitronic AWA/2X12B Manual - Page 7

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Digitronic

Automationsanlagen GmbH

6. Configuration

6.1. Change the input - signal level

The analog inputs'

AWA/2X12B's printed circuit board.

The following input signals can be set: "0-20mA", "-10V - +10V" or "0 - +10V".

The adjusted signal level is marked for every input by with a cross on the metal cap.

To change the input level, detach all cable connections from the device.,

remove the device from the switch chest, open the floor part at the devices

side using a screwdriver and pull the printed circuit board out of the floor

part. On the solding side of the printed circuit board are to solding bridges

for signal input 1 and 2 which are called SJ1 to SJ4 in the drawing. Via SJ1

and SJ" the signal level for input 1 and via SJ3 to SJ4 for input 2 are set.

Having adjusted the desired signal level, the input switching has to be

equalized anew. See also chapter "6.3. Calibration" on page 8.

6.1.1. Solding bridge SJ1

To switch the 1st analog input from unipolar (0V - 10V) to the bipolar (-10V

- +10V) voltage measuring the solding bridge SJ1 has to be closed. This solding bridge may only be

closed, if the solding bridge SJ2 is open.

6.1.2. Solding bridge SJ2

To switch the 1st analog input from voltage - to currency input, the solding bridge SJ2 has to be closed.

6.1.3. Solding bridge SJ3

To switch the 2nd analog input from voltage - to currency input, the solding bridge SJ3 has to be

closed.

6.1.4. Solding bridge SJ4

To switch the 2nd analog input from unipolar (0V - 10V) to the bipolar (-10V - +10V) voltage measuring

the solding bridge SJ4 has to be closed. This solding bridge may only be closed, if the solding bridge

SJ3 is open.

6.2. Reference voltage supply

Two intern voltages (+4.096 and +5V) are avaible, an external voltage source may be

enabled by switching them both of. The choice is made via a jumper ledge on the

component side of the printed circuit board. To change the reference voltage, remove

the cap by unscrewing the four cap nuts and choose your voltage source at jumper

JP1.

Bridge at 1+2

= +5V

Bridge at 2+3

= +4.096V

Bridge open

= external

Note:

If the source of reference voltage is changed, the input switching has to be equilibrated

anew. (see also chapter "6.3. Calibration").

Edition: Jun. 17

signal level can be changed by solding bridges on the solder side of the

Ref. voltage from the operating voltage.

Ref. voltage by precission voltage controller

(default).

Ref. voltage external by at least +1V to a maximum of +5V.

Analog - Digital - Converter

AWA/2X12B

Page: 7