YSI DIQ/S 182 XT-4-MOD - Manual (Page 8)

Overview System 182 XT-4
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Relay outputs The relay outputs can be linked to sensors. Linked outputs can be used
to monitor sensors and for the output of measured values.
A relay output can be programmed as:
 a monitoring relay
 a limit monitor
 a proportional output of measured values (pulse width or frequency
output)
 the control unit of a sensor cleaning system driven by compressed
air.
For quick orientation, the states of all relay outputs are clearly indicated
on the display.
Modbus output The Modbus output enables a connection to a Modbus master (Modbus
RTU/RS 485) and thus a connection to a superordinate process
control.
Cleaning system driven
by compressed air
The DIQ/S 182 XT-4-MOD is prepared for the time-controlled sensor
cleaning function driven by compressed air. The cleaning process is
controlled from the operating unit. The operating unit provides the
supply voltage and control relay for the compressed air valve in the
DIQ/CHV valve module. This enables simple setup and uncomplicated
wiring.
Alternatively, the MIQ/CHV PLUS valve module can be installed in the
system. It combines the relay, valve and valve power supply in one MIQ
enclosure. Thus, no additional wiring is required, which makes
installation easier especially if there is a greater distance between the
DIQ/S 182 XT-4-MOD and sensor.
Further system options In case of increased energy demand, an additional power supply unit
can be installed for the power supply if necessary.