Usage Of The Auxiliary Voltage - wtw DIQ/S 182-MOD System Operating Manual

Installation
3 - 40
Warning
No free wires must be allowed to project into the enclosure.
Otherwise, there is a danger that areas safe to contact could come
into contact with dangerous voltages. This could result in life
threatening electric shock when working with the Universal
Transmitter. Always cut off any wires that are not in use as closely
as possible to the cable gland.
17 Close the enclosure of the Universal Transmitter.

3.9.2 Usage of the auxiliary voltage

The Universal Transmitter has a 24 V output (designation,
HILFSSPANNUNG or AUXILIARY VOLTAGE on the terminal strip).
You can use this auxiliary voltage for the relay-controlled opening of the
valve in a DIQ/CHV valve module for the compressed air-driven sensor
cleaning function. To do so, you have to connect the auxiliary voltage
output, a free relay contact and the valve connection in the DIQ/CHV in
series. Bridge a terminal of the auxiliary voltage output with a terminal
of a relay output and run a control line from the remaining terminals to
the valve module.
Caution
The auxiliary voltage must not be used for other purposes.
Connection scheme for one sensor with compressed air cleaning
Terminal strip
R3
DIQ/S 182-MOD
X15
Terminal strip
DIQ/CHV
X6
R2 R1
X14 X13 X12 X11 X10
X5 X4 X3
VERTEILER
DISTRUBUTION
System 182
HILFS-
SPANNUNG
AUXILIARY
VOLTAGE
X9 X8
Valve
control line
X2 X1
VENTIL
VALVE
ba75504e07 04/2012