wtw DIQ/S 182-MOD System Operating Manual page 8

Overview
Relay outputs
Modbus output
Compressed air-driven
cleaning system
Further system options
1 - 2
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 is programmable as:
 Alarm contact (event monitoring)
 Limit monitor
 Proportional output of measured values (pulse width or frequency
output)
 Control unit of a compressed air-driven sensor cleaning system.
For quick orientation, the states of all relay outputs are clearly indicated
on the display.
The Modbus output enables a connection to a Modbus master (Modbus
RTU/RS 485) and thus a connection to a superordinate process
control.
The DIQ/S 182-MOD Universal Transmitter is prepared for the
compressed air-driven, time-controlled sensor cleaning function. For
this, a DIQ/CHV valve module and if necessary a CH cleaning head is
required per sensor (both available as accessories). The cleaning
procedure is controlled by the Universal Transmitter. The Universal
Transmitter provides the supply voltage and control relay for the
compressed air valve in the DIQ/CHV valve module. This enables a
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 the distance between the Universal
Transmitter and sensor is great.
If necessary, an additional power pack can be added to supply sensors
with high power consumption (e.g. UV/VIS sensor).
System 182
ba75504e07 04/2012