Sentera Controls HPSPX-2 Service manual

HPSPX-2 DIFFERENTIAL
PRESSURE PI
CONTROLLER
Mounting and operating instructions

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HPSPX-2 DIFFERENTIAL PRESSURE PI CONTROLLER
Table of contents
SAFETY AND PRECAUTIONS 3
PRODUCT DESCRIPTION 4
ARTICLE CODES 4
INTENDED AREA OF USE 4
TECHNICAL DATA 4
STANDARDS 5
OPERATIONAL DIAGRAM 5
WIRING AND CONNECTIONS 6
MOUNTING INSTRUCTIONS IN STEPS 6
VERIFICATION OF INSTALLATION INSTRUCTIONS 8
OPERATING INSTRUCTIONS 8
TRANSPORT AND STORAGE 10
WARRANTY AND RESTRICTIONS 10
MAINTENANCE 10

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HPSPX-2 DIFFERENTIAL PRESSURE PI CONTROLLER
SAFETY AND PRECAUTIONS
Read all the information, the datasheet, Modbus map, mounting and operating
instructions and study the wiring and connection diagram before working with the
product. For personal and equipment safety, and for optimum product performance,
make sure you entirely understand the contents before installing, using, or maintaining
this product.
For safety and licensing (CE) reasons, unauthorised conversion and/ or modifications
of the product are inadmissible.
e product should not be exposed to abnormal conditions, such as extreme
temperatures, direct sunlight or vibrations. Long-term exposure to chemical
vapours in high concentration can affect the product performance. Make sure the
work environment is as dry as possible; avoid condensation.
All installations shall comply with local health and safety regulations and local
electrical standards and approved codes. is product can only be installed by
an engineer or a technician who has expert knowledge of the product and safety
precautions.
Avoid contacts with energised electrical parts. Always disconnect the power
supply before connecting, servicing or repairing the product.
Always verify that you apply appropriate power supply to the product and use
appropriate wire size and characteristics. Make sure that all the screws and nuts
are well tightened and fuses (if any) are fitted well.
Recycling of equipment and packaging should be taken into consideration and these
should be disposed of in accordance with local and national legislation/regulations.
In case there are any questions that are not answered, please contact your
technical support or consult a professional.

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HPSPX-2 DIFFERENTIAL PRESSURE PI CONTROLLER
PRODUCT DESCRIPTION
e HPSPX -2 series are high resolution differential pressure controllers with analog/
modulating output. e integrated PI control with anti-windup function offers the
possibility to directly control EC motors / fans. ey are equipped with a fully digital
state-of-the-art pressure transducer designed for a wide range of applications. Zero
point calibration and Modbus registers reset can be executed via a tactile switch.
All parameters are accessible via Modbus RTU (3SModbus software or Sensistant).
ARTICLE CODES
Article code Power supply Connection Range, [Pa]
HPSPF-1K0 -2
18—34 VDC 4-wire (separate grounds)
0—1.000 Pa
0—2.000 Pa
0—4.000 Pa
0—10.000 Pa
HPSPF-2K0-2
HPSPF-4K0-2
HPSPF-10K -2
HPSPG-1K0 -2
18—34 VDC /
15—24 VAC ±10% 3-wire (common ground)
0—1.000 Pa
0—2.000 Pa
0—4.000 Pa
0—10.000 Pa
HPSPG-2K0-2
HPSPG-4K0-2
HPSPG-10K -2
INTENDED AREA OF USE
■Differential pressure, air flow volume or air flow velocity measurement and
control in HVAC applications
■Differential pressure / air flow monitoring and control in clean rooms
■Clean air and non-aggressive, non-combustible gases
TECHNICAL DATA
■Built-in digital high resolution differential pressure sensor
■PI control with anti wind-up function and auto-tune function
■Active setpoint selection between differential pressure, air flow volume or air velocity
■Air flow velocity can be measured via Modbus RTU (by using an external PSET-
PTX-200 Pitot tube connection set)
■Minimum and maximum output value selection
■Selectable analog / digital output: 0—10 VDC / 0—20 mA / PWM (open collector type):
►0—10 VDC mode: min. load 50 kΩ (RL ≥ 50 kΩ)
►0—20 mA mode: max. load 500 Ω (RL ≤ 500 Ω)
►PWM mode: PWM Frequency: 1 kHz, min. load 50 kΩ (RL ≥ 50 kΩ)
■Variety of operating ranges and measurement windows
■Selectable response time: 0,1—10 s
■Implemented K-factor
■Selectable internal voltage source for PWM output: 3,3 or 12 VDC
■Differential pressure, air volume or air velocity readout via Modbus RTU
■Selectable minimum and maximum operating ranges
■Maximum power consumption:
►HPSPF-2: 1,8 W
►HPSPG-2: 1,68 W
■Nominal power consumption in normal operation:
►HPSPF-2: 1,35 W
►HPSPG-2: 1,26 W

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HPSPX-2 DIFFERENTIAL PRESSURE PI CONTROLLER
■Imax:
►HPSPF-2: 75 mA
►HPSPG-2: 70 mA
■Modbus registers reset function (to factory pre-set values)
■Four LEDs for controller status indication
■Modbus RTU communication
■Sensor calibration procedure via tact switch
■Aluminium pressure connection nozzles
■Accuracy: ±2 % of the operating range
■Protection class: IP65
■Operating ambient conditions:
►Temperature: -5—65 °C
►Rel. humidity: < 95 % rH (non-condensing)
■Storage temperature: -20—70 °C
STANDARDS
■Low Voltage Directive 2014/34/EC
■EMC Directive 2014/30/EC: EN 61000-6-3:2007/A1:2011/AC:2012
■WEEE Directive 2012/19/EC
■RoHs Directive 2011/65/EC
OPERATIONAL DIAGRAM
Diagrams
Max alarm
Input
(DP, VFR, AV)
t [s]
Max span
Setpoint
Min span
Min alarm
01020304050607080901
00
10
20
30
40
50
60
70
80
90
100
Setpoint
Time [s]
Differential pressure / volume flow /
air velocity full scale (%)
Kp = 20
Kp = 10
Kp = 5

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HPSPX-2 DIFFERENTIAL PRESSURE PI CONTROLLER
WIRING AND CONNECTIONS
HPSPF -2 HPSPG -2
VIN 18—34 VDC 18—34 VDC 15—24 VAC ±10%
GND Ground Common ground AC ~
AModbus RTU (RS485), signal A
/B Modbus RTU (RS485), signal /B
AO1 Analog / modulating output (0—10 VDC / 0—20 mA / PWM)
GND Ground AO Common ground
Connections Spring contact terminal blocks, cable cross section: 1,5 mm2
ATTENTION Never connect the common ground of G type articles to other devices powered
by a DC voltage. If an AC power supply is used with a unit on a Modbus network,
the GND terminal should NOT BE CONNECTED to other units on the network or
via the CNVT-USB-RS485 converter. is may cause permanent damage to the
communication semiconductors and / or the computer!
MOUNTING INSTRUCTIONS IN STEPS
Before you start mounting the HPSPX-2 differential pressure PI controller, read
carefully “Safety and Precautions”. Choose a smooth surface for installation (awall,
panel, etc.) and follow these steps:
1. Unscrew the front cover of the enclosure to remove it.
2. Fix the enclosure onto the surface by means of suitable fasteners while adhering
to the mounting dimensions shown in Fig. 1 Mounting dimensions and the correct
mounting position shown in Fig. 2 Mounting position.
Fig. 1 Mounting dimensions Fig. 2 Mounting position
2x Ø 3,
4
49
52
Correct Incorrect
HPS
+_
HPS
+_
HPS
+_
3. Insert the cable though the cable gland.
4. Connect as shown in Fig. 3 Connections adhering to the information in section
“Wiring and connections”.

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HPSPX-2 DIFFERENTIAL PRESSURE PI CONTROLLER
Fig. 3 Connections
Power supply
G: 18—34 VDC / 15—24 VAC ±10%
F: 18—34 VDC
Modbus RTU
A /B
Analog / modulating (PWM) output
0—10 VDC/0—20 mA / PWM
5. Connect the nozzles with the tubing.
6. Put back the front cover and secure it with the screws.
7. Switch on the power supply.
For sensor calibration and Modbus register reset procedures, refer to section
“OPERATING INSTRUCTIONS” on page 8.
NOTE
PWM voltage selection:
■When the internal pull-up resistor (JP1) is connected, the voltage source
is set via Modbus holding register 48, i.e. 3,3 VDC or 12 VDC. See Fig. 4
Pull -up resistor jumper 1.
Fig. 4 Pull-up resistor jumper 1
■When JP1 is disconnected, the output type is Open collector. See Fig. 5 PWM
(Open collector) connection.
■Only when JP1 is not connected and the analog output (AO1) is assigned as PWM
output (via Holding register 40 - see Modbus Maps below), an external pull-up
resistor is used.
Fig. 5 PWM (Open collector) connection
External pull-up
resistor
(10—100 kΩ)
Analog / modulating (PWM)
output
0—10 VDC/0—20 mA/ PWM
Voltage source
(5—50 VDC)
Optional settings
To assure correct communication, the NBT needs to be activated in only two devices
on the Modbus RTU network. If necessary, enable the NBT resistor via 3SModbus or
Sensistant (Holding register 41).

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HPSPX-2 DIFFERENTIAL PRESSURE PI CONTROLLER
Example 1 Example 2
RX
ТX
NBT
NBT
Slave 2
Master
Slave n
Slave 1
Slave 2
Slave 1
RX
ТX
NBT
NBT
Master
Slave n
On a Modbus RTU network, two bus terminators (NBTs) need to be activated.
NOTE
VERIFICATION OF INSTALLATION INSTRUCTIONS
Continuous green LED1 indication as shown in Fig. 6 Power / Modbus communication
indication means the unit is supplied. If LED1 is not on, check the connections again.
Blinking green LED1 indication as shown in Fig. 6 Power / Modbus communication
indication means the unit has detected a Modbus network. If LED1 does not blink,
check the connections again.
Fig. 6 Power / Modbus communication indication
e status of the LEDs can be checked only when the unit is energised. Take the
relevant safety measures!
ATTENTION
OPERATING INSTRUCTIONS
Calibration procedure:
8. Disconnect the nozzles.
9. ere are two options for starting the calibration process:
10. Either write “1” in holding register 49 or press button SW1 for 4 seconds until
the green LED2 and yellow LED3 on the printed circuit board blink twice and
release it (see Fig. 7 Sensor calibration and Modbus register reset tact switch and
indication).
11. After 2 seconds, the green LED2 and yellow LED3 will blink twice once again to
indicate that the calibration procedure has finished.

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HPSPX-2 DIFFERENTIAL PRESSURE PI CONTROLLER
Make sure that the nozzles are free and disconnected.
ATTENTION
Modbus registers reset procedure:
12. Press button SW1 for 4 seconds until the green LED2 and yellow LED3 on the
printed circuit board blink twice and hold the button until both LEDs blink again
three times (see Fig. 7 Sensor calibration and Modbus register reset tact switch
and indication).
13. e Modbus registers are restored to their default values (factory pre-set).
Fig. 7 Sensor calibration and Modbus register reset tact switch and indications
Press and hold the button until both LEDs on the PCB blink twice and hold it until
both LEDs blink again three times. If the button is released before both LEDs blink
again three times, the sensor will have carried out a calibration procedure instead
of Modbus registers reset procedure.
NOTE
Communication holding registers reset procedure:
14. Put the jumper onto pins 1 and 2 of the P4 connector for more than 20 s while
the device is powered. (See Fig. 8 Modbus holding register reset jumper ).
Fig. 8 Modbus holding register reset jumper
1
2
3
4
5
15. Modbus communication holding registers from 1 to 3 will be reset to the default
values.
16. Remove the jumper.
Make sure that the nozzles are free and not connected.
ATTENTION
LED indications (See Fig. 9):
17. When the green LED1 is on, the power supply is adequate, but there is no active
Modbus communication; if it blinks, the Modbus RTU communication is active.
18. When the green LED2 is on, the measured differential pressure, air volume or air
velocity is stabilized between the minimum span and maximum span.
19. When the yellow LED3 is on, the measured differential pressure, air volume or
air velocity has exceeded the minimum or maximum span threshold.

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HPSPX-2 DIFFERENTIAL PRESSURE PI CONTROLLER
20. When the red LED4 blinks, there is a problem with the sensor element.
21. When the red LED4 is solid on, the differential pressure, air volume or air
velocity has exceeded the minimum or maximum alarm threshold.
Fig. 9 LED indications
22. Sensor element failure indication:
In case of failure of the sensor element or loss of communication with it, the red
LED4 blinks.
Autotune function:
e auto-tune function computes the Kp and Ti parameters according to the system
response. Writing ‘1’ into holding register 36 starts the auto-tune procedure. When
it is completed, the HPSPX -2 controller automatically writes ‘0’ in holding register
36 and overrides holding registers 34 and 35 by entering the new values of Kp and
Ti. Once started, the Auto-tune procedure cannot be stopped while the controller is
on. If the HPSPX -2 is restarted, however, auto-tune is aborted.
Auto-tune function calculates the Kp and Ti parameters necessary for the good
system performance. However, if you have extensive knowledge of PI control, you
can change these parameters via writing in Modbus holding registers 34 and 35.
NOTE
TRANSPORT AND STORAGE
Avoid shocks and extreme conditions; stock in original packing.
WARRANTY AND RESTRICTIONS
Two years from the delivery date against defects in manufacturing. Any modifications
or alterations to the product after the date of publication relieve the manufacturer
of any responsibilities. e manufacturer bears no responsibility for any misprints or
mistakes in this data.
MAINTENANCE
In normal conditions this product is maintenance-free. If soiled, clean with a dry or
damp cloth. In case of heavy pollution, clean with a non-aggressive product. In these
circumstances the unit should be disconnected from the supply. Pay attention that
no fluids enter the unit. Only reconnect it to the supply when it is completely dry.