wtw IQ SENSOR NET System 2020 XT, Руководство по эксплуатации, Страница: 14 / 216

Overview System 2020 XT C
ONNECT
1 - 6
ba75970e01 10/2012
1.2.4 Components of the system 2020 XT
Minimum configuration
(basic components)
The following basic components are required for a System
2020 XT C
ONNECT
:

MIQ/MC2
controller

A terminal/controller MIQ/TC 2020 XT (configured as terminal) or
PC Terminal C
ONNECT

A power supply module (e.g. MIQ/PS)

At least one IQ sensor.
IQ sensors, main and
secondary measured
values
Sensors provide main measured values (e.g. pH, D. O. concentration,
turbidity value...) and additionally, depending on the type, secondary
measured values (e.g. temperature). In the System 2020 XT, digital
WTW single sensors and multiple sensors can be used:

Single sensors provide a main measured value and normally a sec
-
ondary measured value (example: TriOxmatic 700 IQ → D. O. +
temperature).

All active 0/4-20 mA inputs of the MIQ/IC2 input module rank among
the single sensors. Via a 0/4-20 mA input, any external instruments
can be connected to the IQ S
ENSOR
N
ET
via their current output.
Each input provides a main measured value.

Multiple sensors provide several main measured values and nor
-
mally one secondary measured value (example: VARiON 700 IQ →
am n temperature).
Extension components The system can be adapted to fulfill different specifications by adding
further components, e.g. by:

Terminals. They are the operation and communication units for the
IQ S
ENSOR
N
ET
. Available are:
– Mobile terminal/controller MIQ/TC 2020 XT (configured as termi
-
nal) for operation of the system from varying locations, for exam
-
ple for calibration of IQ sensors on site.
– PC Terminal C
ONNECT
. Connection to the PC via the Ethernet
interface.

Output modules with relay, current and valve outputs. Valve outputs
enable the time controlled, compressed air operated cleaning of the
sensor.
Each main measured value occupies a sensor location in the
IQ S
ENSOR
N
ET
. A multiple sensor with two active main measured
values thus occupies two sensor locations. The available sensor
locations can be occupied by any single or multiple sensors.