YSI IQ S ENSOR N ET MIQ/CHV PLUS - Manual (Page 5)

MIQ/CHV PLUS Overview
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1 Overview
General characteristics The MIQ/CHV PLUS valve module provides a switchable compressed
air valve for the operation of sensor cleaning heads.
The MIQ/CHV PLUS valve module registers on the IQ S ENSOR N ET
system as an output (V). It appears in the list of outputs and can be
linked with a sensor. Thus, the valve is controlled directly by the
IQ S
ENSOR N ET .
Alternatively, you can also control the valve via an external switch. The
switch can consist of one of the following:

any relay in the IQ S ENSOR N ET system
 the relay of a measuring transmitter with the R option
 any other switch (relay or sensor)
The valve module is connected with the external switch via a control
line for this.
Warning
The valve circuit must not supply any unauthorized voltages or
currents. It has to be made sure that the circuit at any time meets
all requirements of a Limited circuit or Limited Power as well as of
SELV (Safety Extra Low Voltage). For more details, see chapter 7
T
ECHNICAL DATA .