Copyright HK Instruments 2022
www.hkinstruments.fi
Installation version 8.0 2022
INSTALLATION
INSTRUCTIONS
Pressure and flow controllers
DPT-Ctrl-MOD Series
• READ THESE INSTRUCTIONS CAREFULLY BEFORE ATTEMPTING TO
INSTALL, OPERATE OR SERVICE THIS DEVICE.
• Failure to observe safety information and comply with instructions can
result in PERSONAL INJURY, DEATH AND/OR PROPERTY DAMAGE.
• To avoid electrical shock or damage to equipment, disconnect power
before installing or servicing and use only wiring with insulation rated for
full device operating voltage.
• To avoid potential fire and/or explosion do not use in potentially
flammable or explosive atmospheres.
• Retain these instructions for future reference.
• This product, when installed, will be part of an engineered system whose
specifications and performance characteristics are not designed or
controlled by HK Instruments. Review applications and national and local
codes to assure that the installation will be functional and safe. Use only
experienced and knowledgeable technicians to install this device.
Thank you for choosing an HK Instruments DPT-Ctrl-MOD series air han-
dling controller with differential pressure or airflow transmitter. The DPT-
Ctrl-MOD series PID controllers are engineered for building automation in
the HVAC/R industry. With the built-in controller of the DPT-Ctrl-MOD it
is possible to control the constant pressure or flow of fans, VAV systems or
dampers. When controlling air flow, it is possible to select a fan manufacturer
or a common measuring probe that has a K-value.
The DPT-Ctrl-MOD includes an Input terminal that enables the reading of
multiple signals such as temperature or control relays over Modbus. The
Input terminal has one input channel designed to accept 0−10 V, NTC10k,
Pt1000, Ni1000/(-LG), and BIN IN (potential free contact) signals.
DPT-Ctrl-MOD series devices are commonly used in HVAC/R
systems for:
• Controlling differential pressure or air flow in air handling systems
• VAV applications
• Controlling parking garage exhaust fans
SPECIFICATIONS
Performance
Accuracy (from applied pressure):
Model 2500:
Pressure < 125 Pa = 1 % + ±2 Pa
Pressure > 125 Pa = 1 % + ±1 Pa
Model 7000:
Pressure < 125 Pa = 1.5 % + ±2 Pa
Pressure > 125 Pa = 1.5 % + ±1 Pa
(Accuracy specifications include: general accuracy,
linearity, hysteresis, long term
stability, and repetition error)
Overpressure:
Proof pressure: 25 kPa
Burst pressure: 30 kPa
Zero point calibration:
Manual pushbutton or Modbus
Response time:
1.0−20 s, selectable via menu or Modbus
Communication
Protocol: MODBUS over Serial Line
Transmission Mode: RTU
Interface: RS485
Byte format (11 bits) in RTU mode:
Coding system: 8-bit binary
Bits per byte:
1 start bit
8 data bits, least significant bit sent
first
1 bit for parity
1 stop bit
Baud rate: selectable in configuration
Modbus address: 1–247 addresses selectable in
configuration menu
Technical Specifications
Media compatibility:
Dry air or non-aggressive gases
Controller parameter (selectable via menu and
Modbus):
Setpoint 0...2500 (model 2500)
0...7000 (model 7000)
P-band 0...10 000
I-gain 0...1000
D-factor 0...1000
Pressure units (selectable via menu):
Pa, kPa, mbar, inWC, mmWC, psi
Flow units (selectable via menu):
Volume: m
3
/s, m
3
/hr, cfm, l/s
Velocity: m/s, ft/min
Measuring element:
MEMS, no flow-through
Environment:
Operating temperature: -20...50 °C
Temperature compensated range 0...50 °C
Storage temperature: -40...70 °C
Humidity: 0 to 95 % rH, non condensing
Physical
Dimensions:
Case: 102.0 x 71.5 x 36.0 mm
Weight:
150 g
Mounting:
2 each 4.3 mm screw holes, one slotted
Materials:
Case: ABS
Lid: PC
Pressure inlets: Brass
Protection standard:
IP54
Display
2-line display (12 characters/line)
Line 1: Direction of control output
Line 2: Pressure or air flow measurement,
selectable via menu
If input is selected, line 2 shows also
input information (for example
temperature)
Size: 46.0 x 14.5 mm
Electrical connections:
4+4 position spring-loaded terminals
Wire: 0.2–1.5 mm
2
(16–24 AWG)
Cable entry:
Strain relief: M16
Knockout : 16 mm
Pressure fittings
5.2 mm barbed brass
+ High pressure
− Low pressure
Electrical
Supply voltage:
24 VAC or VDC, ±10 %
Power consumption:
< 1.0 W
Output signal:
via Modbus
Control output:
0-10 V
Input signal:
0−10 V, NTC10k, Pt1000, Ni1000/(-LG) or BIN IN
Conformance
Meets the requirements for:
CE:
UKCA:
EMC:
2014/30/EU
S.I. 2016/1091
RoHS:
2011/65/EU
S.I. 2012/3032
WEEE:
2012/19/EU
S.I. 2013/3113
INTRODUCTION
WARNING
APPLICATIONS
RoHS
COMPLIANT
