Copyright HK Instruments 2014
www.hkinstruments.fi
Installation version 1.0 2014
STEP 2: WIRING DIAGRAMS
CONFIGURATION
CONTINUED
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
Figure 2b - Wiring diagram example for input signals
NOTE! 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 and -.
2) Press the select button briefly.
3) Wait until the LED turns off and then install tubes again for
the pressure inlets.
It is recommended that the zero point is adjusted every 12
months during normal operation.
STEP 3: CONFIGURATION
Input 1
Input 2
GND
GND
Pt1000
ntc10k
J1
J2
J3
IN1
IN2
Input 1 Pt1000 temperature:
Function 04 - Read input register 3x0005
Input 2 ntc10k temperature:
Function 04 - Read input register 3x0008
1) Activate the device Menu by pushing the the select button for 2
seconds.
2) Select the address for Modbus: 1...247
BAUD RATE
9600
SELECT
UP
DOWN
ADDRESS
99
SELECT
UP
DOWN
PARITY BIT
NONE
SELECT
UP
DOWN
3) Select the baud rate: 9600/19200/38400.
4) Select the parity bit: None/Even/Odd
5) Select the pressure unit for display: Pa/inchWC/mmWC/psi/mbar
PRESS. UNIT
Pa
SELECT
UP
DOWN
6) Select the response time: 1...20 s
RESPONSETIME
20 s
SELECT
UP
DOWN
7) Push the select button to exit menu.
SELECT
EXIT MENU
SELECT
STEP 4: ZERO POINT ADJUSTMENT
SELECT
STEP 5: INPUT SIGNAL CONFIGURATION
Input signals can be read over Modbus via DPT MOD RS485
interface.
Signals
Accuracy for measurement
Resolution
0...10 V
< 0,5 %
0,1 %
NTC10k
< 0,5 %
0,1 %
Pt1000
< 0,5 %
0,1 %
Ni1000/(-LG)
< 0,5 %
0,1 %
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
configured independently.
Figure 3 - Input signal configuration
J1
J2
J3
IN1
IN2
J1
J1
J1
J2
J2
J2
J3
J3
J3
NTC10k / BIN IN
Pt1000 / Ni10007(-LG)
0...10 V
A
B
24 V
GND
+ Power Supply
24VDC / 24VAC
Input 1
Input 2
GND
GND
