HK Instruments DPT-IO-MOD Series Installation Instructions page 3

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.
Figure 2a - Wiring diagram
Modbus
+ Power Supply
24VDC / 24VAC
Figure 2b - Wiring diagram example for input signals
Pt1000
NTC10k
Input 1 Pt1000 temperature:
Function 04 - Read input register 3x0005
Input 2 NTC10k temperature:
Function 04 - Read input register 3x0008
STEP 3: CONFIGURATION
1) Activate the device Menu by pushing the the select button for 2
seconds.
2) Select the address for Modbus: 1...247
ADDRESS
99
3) Select the baud rate: 9600/19200/38400.
BAUD RATE
9600
4) Select the parity bit: None/Even/Odd
PARITY BIT
NONE
5) Select the pressure unit for display: Pa/inchWC/mmWC/psi/mbar
PRESS. UNIT
Pa
Copyright HK Instruments 2019
A Input 1
B GND
24 V Input 2
GND
GND
J1
Input 1
J2
GND
J3
IN1 IN2
Input 2
GND
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
SELECT
UP
DOWN
CONFIGURATION
6) Select the response time: 1...20 s
RESPONSETIME
20 s
7) Push the select button to exit menu.
SELECT
EXIT MENU
STEP 4: ZERO POINT ADJUSTMENT
NOTE! Always zero the device before use.
Supply voltage must be connected one hour before the zero point
adjustment is carried out. Access via Modbus or by push button.
1) Loose both tubes from the pressure inlets + and -.
2) Press the select button briefly.
3) Wait until the LED turns off and then install tubes again for the
pressure inlets.
STEP 5: INPUT SIGNAL CONFIGURATION
Input signals can be read over Modbus via DPT MOD RS485 interface.
Signals
0...10 V
NTC10k
Pt1000
Ni1000/(-LG)
BIN IN (potential free contact)
The jumpers should be set according to the instructions below and the
value should be read from the right register. Both inputs can be config-
ured independently.
Figure 3 - Input signal configuration
J1
J2
J3
www.hkinstruments.fi
CONTINUED
SELECT
UP
DOWN
SELECT
SELECT
Accuracy for measurement
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
J1
J2 NTC10k / BIN IN
J3
J1
J2 Pt1000 / Ni1000(-LG)
J3
IN1 IN2
J1
J2 0...10 V
J3
Installation version 8.0 2019
Resolution
0,1 %
0,1 %
0,1 %
0,1 %