HK Instruments DPT-Ctrl-MOD Series Installation Instructions page 2

SCHEMATICS
LEDs
Joystick 1
Select
Joystick 2
A
Up
Joystick 3
B
Down
24 V
GND
Menu buttons
INSTALLATION
1) Mount the device in the desired location (see step 1).
2) Open the lid and route the cable through the strain relief and connect the
wires to the terminal block(s) (see step 2).
3) The device is now ready for configuration.
WARNING! Apply power only after the device is properly wired.
STEP 1: MOUNTING THE DEVICE
1) Select the mounting location (duct, wall, panel).
2) Use the device as a template and mark the screw holes.
3) Mount with appropriate screws.
Figure 1a - Mounting orientation
YES
STEP 2: WIRING DIAGRAMS
For CE compliance, a properly grounded shielding cable is required.
1) Unscrew the strain relief and route the cable(s).
2) Connect the wires as shown in figure 2a and 2b.
3) Tighten the strain relief.
It is recommended to use shielded twisted pair cable for Modbus cabling.
The cable shield must be earthed only in one point, normally, at the end of
the main cable.
Figure 2a - Wiring diagram
Modbus
+ Power Supply
24VDC / 24VAC
Figure 2b - Wiring diagram example for input signals
ntc10k
Input ntc10k temperature:
Function 04 - Read input register 3x0007
Copyright HK Instruments 2022
Input terminal
configuration
jumpers
Pressure
sensor
Display connection
Control out
GND
Terminal
Input blocks
GND
NO NO
A Control out
B GND
24 V Input
GND
GND
J1
Input
J2
GND
J3
IN
STEP 3: CONFIGURATION
1) Press the select button for two seconds to open the device menu.
2) Zero point adjustment. For more information, see Step 4.
SELECT
ZERO SENSORS
3) Select the functioning mode of the controller: PRESSURE or FLOW.
- Select PRESSURE when controlling differential pressure.
Go to point 3.1.
- Select FLOW when controlling air flow.
Go to point 3.2.0.
CONTROL UNIT
PRESSURE
When control unit PRESSURE is selected.
3.1) Select pressure unit for display and output: Pa, kPa, mbar, inWC or mmWC.
Then go to point 4.
PRESS. UNIT
Pa
When control unit FLOW is selected.
3.2.0) Select the functioning mode of the controller
- Select Manufacturer when connecting DPT-Ctrl-MOD to a fan with pressure
measurement taps.
- Select Common probe when using DPT-Ctrl-MOD with a common measurement
probe that follows the formula:
q = k ∙ √∆P (i.e. FloXact)
MANUFACTURER
Common probe
Common probe
3.2.1) If Common probe selected: select measurement units used in the formula
(aka Formula unit) (i.e. l/s)
FORMULA UNIT
l/s
3.2.2) Select K-value
a. If manufacturer selected in step 3.2.0:
Each fan has a specific K-value. Select the K-value from fan manufacturer's speci-
fications.
b. If Common probe selected in step 3.2.0:
Each common probe has a specific K-value. Select the K-value from common probe
manufacturer's specifications.
Available K-value range: 0.001...9999.000
K-VALUE
9000.000
3.2.3) Select flow unit for display and output:
Flow volume: m
3
/s, m
Velocity: m/s, f/min
FLOW UNIT
m 3 /s
4) Select the address for Modbus: 1...247
ADDRESS
99
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SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
Flakt Woods
SELECT
UP
DOWN
SELECT
UP
DOWN
/h, cfm, l/s
3
SELECT
UP
DOWN
SELECT
UP
DOWN
UP
DOWN
Installation version 8.0 2022