YSI DIQ/S 182-MOD System 182 - Manual (Page 54)

Installation System 182
3 - 40 ba76025e01 02/2012
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.
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
17 Close the enclosure of the Universal Transmitter.
X13 X15
X6
X12 X14
X5
X11
X4
X10
X3
X9
X2
X8
X1
Terminal strip
DIQ/S 182-MOD
Terminal strip
DIQ/CHV
R1 AUXILIARY
VOLTAGE
VALVE DISTRUBUTION
R2 R3
Valve
control line