Current Output; Connections Of Controller Stop, Sample-Water Sensor And Temperature Sensor - Grundfos Conex DIA-2 Installationsanleitung

10.4 Current output

Make sure that the polarity of the current
output is correct!
Caution
Maximum load: 500 Ω.
The current output can be set to one of the two
standard ranges "0-20 mA" or "4-20 mA", or it can be
freely adjusted.
• Connect the screen to earth (PE) at one end.
Output 1: chlorine, chlorine dioxide, ozone,
hydrogen peroxide (parameter 1)
This current output shows the displayed measured
value as an analog current signal.
Use of current signal for measured values:
• as input signal for another indicator
• as input signal for an external controller.
1. Connect the + conductor to terminal 23
(wall-mounted enclosure) or terminal 1/3 (control
panel enclosure).
2. Connect the - conductor to terminal 24
(wall-mounted enclosure) or terminal 1/4 (control
panel enclosure).
Output 2: pH (parameter 2)
This current output shows the displayed measured
value as an analog current signal.
Use of current signal for measured values:
• as input signal for another indicator
• as input signal for an external controller.
1. Connect the + conductor to terminal 25
(wall-mounted enclosure) or terminal 1/5 (control
panel enclosure).
2. Connect the - conductor to terminal 26
(wall-mounted enclosure) or terminal 1/4 (control
panel enclosure).
Output 3: continuous controller parameter 2 (or
temperature)
Shows the calculated actuating variable signal of the
controller as an analog current signal.
Use of actuating variable signal:
• as input signal for a final control element with
current input
or temperature output:
Shows the temperature measured by the optional
temperature sensor as an analog current signal.
Use of temperature current signal:
• as input signal for another indicator.
1. Connect the + conductor to terminal 27
(wall-mounted enclosure) or terminal 1/6 (control
panel enclosure).
2. Connect the - conductor to terminal 28
(wall-mounted enclosure) or terminal 1/7 (control
panel enclosure).
Output 4: continuous control parameter 1
This current output shows the calculated actuating
variable signal as an analog current signal.
Use of actuating variable signal:
• as input signal for a continuous final control
element.
1. Connect the + conductor to terminal 29
(wall-mounted enclosure) or terminal 1/8 (control
panel enclosure).
2. Connect the - conductor to terminal 30
(wall-mounted enclosure) or terminal 1/7 (control
panel enclosure).
10.5 Connections of controller stop,
sample-water sensor and temperature
sensor
Connecting the controller stop
1. Connect the + conductor to terminal 17
(wall-mounted enclosure) or terminal 2/1 (control
panel enclosure).
2. Connect the - conductor to terminal 18
(wall-mounted enclosure) or terminal 2/2 (control
panel enclosure).
Connecting the sample-water sensor
Cable colours and marking: See connections of
measuring-cell types
AQC-D1/-D11/AQC-D2/-D12/AQC-D3/-D13.
1. Connect the + conductor to terminal 19
(wall-mounted enclosure) or terminal 2/3 (control
panel enclosure).
2. Connect the - conductor to terminal 20
(wall-mounted enclosure) or terminal 2/4 (control
panel enclosure).
When using measuring cell AQC-D2/-D12,
Note
the water sensor must always be
connected and activated!
Connecting the Pt100 temperature sensor
1. Connect the + conductor to terminal 21
(wall-mounted enclosure) or terminal 1/11
(control panel enclosure).
2. Connect the - conductor to terminal 22
(wall-mounted enclosure) or terminal 1/12
(control panel enclosure).
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