Sentera Controls HPSPX-LP Manuel de service

HPSPX-LP DIFFERENTIAL

PRESSURE PI

CONTROLLER

Mounting and operating instructions

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 5

MOUNTING INSTRUCTIONS IN STEPS 6

VERIFICATION OF THE INSTALLATION INSTRUCTIONS 8

OPERATING INSTRUCTIONS 9

TRANSPORT AND STORAGE 11

WARRANTY AND RESTRICTIONS 11

MAINTENANCE 11

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HPSPX-LP

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-LP

DIFFERENTIAL PRESSURE

PI CONTROLLER

PRODUCT DESCRIPTION

e HPSPX-LP series are high resolution diﬀerential pressure controllers (-125—

125 Pa). 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 tact switch.

ey also feature integrated K-factor and an analogue / modulating output (0—10

VDC / 0—20 mA / 0—100 % PWM). All parameters are accessible via Modbus RTU

(3SModbus software or Sensistant).

ARTICLE CODES

Codes Power supply Maximum power

consumption

Nominal power

consumption Imax Operating range

HPSPF-LP 18—34 VDC 1,3 W 1,26 W 71 mA

-125—125 Pa

HPSPG-LP 18—34 VDC 1,3 W 1,26 W 71 mA

15—24 VAC ±10 % 1 W 1 W 70 mA

INTENDED AREA OF USE

■Diﬀerential pressure measurement in HVAC applications

■Volume ﬂow measurement in HVAC applications

■Air velocity measurement (by using an external PSET-PTX-200 Pitot tube

connection set) in HVAC applications

■Diﬀerential pressure / volume ﬂow monitoring in clean rooms

■Clean air and non-aggressive, non-combustible gases

TECHNICAL DATA

■Built-in digital high resolution diﬀerential pressure sensor

■Air velocity can be measured via Modbus RTU (by using an external PSET-PTX-200

Pitot tube connection set)

■Selectable analogue / digital output: 0—10 VDC / 0—20 mA / PWM (open collector

type):

►0—10 VDC mode: RL≥ 50 kΩ

►0—20 mA mode: RL≤ 500 Ω

►PWM mode: PWM Frequency: 1 kHz, RL≥ 50 kΩ

■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

■Modbus registers reset function (to factory pre-set values)

■Four LED indicators for the status of the transmitter and the controlled values

■Modbus RTU communication

■Sensor calibration procedure via tact switch

■Aluminium pressure connection nozzles

■Accuracy: ±2 % of the operating range

■Operating ambient conditions:

►Temperature: -5—65 °C

►Rel. humidity: < 95 % rH (non-condensing)

■Storage temperature: -20—70 °C

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HPSPX-LP

DIFFERENTIAL PRESSURE

PI CONTROLLER

STANDARDS

■EMC Directive 2014/ 30/EC:

►EN 61326-1:2013 Electrical equipment for measurement, control and laboratory

use - EMC requirements - Part 1: General requirements

►EN 61326-2-3:2013 Electrical equipment for measurement, control and

laboratory use - EMC requirements - Part 2-3: Particular requirements - Test

conﬁguration, operational conditions and performance criteria for transducers

with integrated or remote signal conditioning

■WEEE Direc tive 2012/19/EC

■RoHs Directive 2011/65/EC

OPERATIONAL DIAGRAM

Max alarm

Input

(DP, VFR, AV)

t (s)

Max span

Setpoint

Min span

Min alarm

01020304050607080901

100

Setpoint

Time [s]

Diﬀerential pressure / volume ﬂow /

air velocity full scale (%)

Kp = 20

Kp = 10

Kp = 5

WIRING AND CONNECTIONS

Article type HPSPF-LP HPSPG-LP

Vin 18—34 VDC 18—34 VDC 13—26 VAC

Ground Common ground AC ~

GND Ground / AC ~

AModbus RTU (RS485), signal A

/B Modbus RTU (RS485), signal /B

AO1 Analogue / modulating output (0—10 VDC / 0—20 mA / PWM)

GND Ground AO1 Common ground

Connections Cable cross section 1,5 mm2

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HPSPX-LP

DIFFERENTIAL PRESSURE

PI CONTROLLER

ATTENTION e -F version of the product is not suited for 3-wire connection. It has separate

grounds for power supply and analogue output. Connecting both grounds together

might result in incorrect measurements. Minimum 4 wires are required to connect

-F type sensors.

e -G version is intended for 3-wire connection and features a ‘common ground’.

is means that the ground of the analogue output is internally connected with

the ground of the power supply. For this reason, -G and -F types cannot be used

together on the same network. Never connect the common ground of -G type

articles to other devices powered by a DC voltage. Doing so might cause permanent

damage to the connected devices.

MOUNTING INSTRUCTIONS IN STEPS

Before you start mounting the unit, 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 and the correct mounting position

shown in Fig. 2 below.

Fig. 1 Mounting dimensions Fig. 2 Mounting position

2x Ø 3,

Correct Incorrect

HPS

3. Insert the cable through the cable gland.

4. Crimp the RJ45 cable and plug it into the socket, see Fig. 3 and section “Wiring

and connections”.

Fig. 3 Connections

Power supply

G: 15—24 VAC ±10%/

18—34 VDC

F: 18—34 VDC

Modbus RTU

A /B

Analogue / digital output

0—10 VDC/0—20 mA/PWM

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HPSPX-LP

DIFFERENTIAL PRESSURE

PI CONTROLLER

5. Connect the nozzles to the duct (see Fig. 4). Depending the application you must

use a speciﬁc connection set to connect the nozzles of the unit to the duct:

5.1 To measure diﬀerential pressure, use PSET-QF or PSET-PVC set (pressure

measurement is the unit default setting);

5.2 To measure volume ﬂow, use PSET-PT Pitot tube connection set, PSET-

QF or PSET-PVC connection set. If you use PSET-PT, you should enter the

duct cross sectional area [cm²] in Modbus register 63. If you use PSET-QF

or PSET-PVC, enter the K-factor of the fan (provided by the fan /motor

manufacturer) in Modbus holding register 62.

In case the K-factor is not known, volume ﬂow is calculated from a duct

cross sectional area (holding register 63) multiplied by air velocity (Pitot air

velocity (holding register 64) should be enabled and Pitot tube connected).

5.3 To measure air velocity, use PSET-PT set and enable Pitot tube air velocity

via holding register 64. In this case the K-factor of the fan has to be 0.

Fig. 4 Connecting with accessories

Application 1: Measuring diﬀerential pressure [Pa] or

volume ﬂow [m³/h] using PSET-PVC

Application 2: Measuring volume ﬂow [m³/h] or air velocity

[m/s] using PSET-PT

HPS

+D -S

HPS

6. Switch on the power supply.

NOTE For sensor calibration and Modbus registers reset procedures, refer to section

“Operating instructions”. Always calibrate the sensor before initial use.

PWM voltage selection:

■When the internal pull-up resistor (JP1) is connected , the voltage source

is set via Modbus holding register 54, i.e. 3,3 VDC or 12 VDC. See Fig. 5

Pull -up resistor jumper connected.

Fig. 5 Pull-up resistor jumper connected

■When JP1 is not connected, the output type is Open collector. See Fig. 6. An

external pull-up resistor must be used and the analogue output (AO1) must be

assigned as PWM output (via holding register 54 - see the Modbus Map).

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HPSPX-LP

DIFFERENTIAL PRESSURE

PI CONTROLLER

Fig. 6 PWM (Open collector) connection (JP1 disconnected)

PWM GND

External voltage

source (5—30 VDC)

External pull-up

resistor

50—100 kΩ

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 9).

Example 1 Example 2

ТX

NBT

Slave 2

Master

Slave n

Slave 1

Slave 2

Slave 1

ТX

NBT

Master

Slave n

NOTE On a Modbus RTU network, two bus terminators (NBTs) need to be activated.

7. Put back the front cover and secure it with the screws.

8. Customise the factory settings to the desired ones via the 3SModbus software

or the Sensistant conﬁgurator. For the default factory settings, see Modbus

For the complete Modbus register data, refer to the product Modbus Register

Map, which is a separate document attached to the article code on the website

and contains the registers list. Products with earlier ﬁrmware versions may not be

compatible with this list.

NOTE

VERIFICATION OF THE INSTALLATION INSTRUCTIONS

Continuous green LED1 indication as shown in Fig. 7 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. 7 Power / Modbus communication

indication means the unit has detected a Modbus network. If LED1 does not blink,

check the connections again.

NOTE For more information, refer to the product datasheet - Settings.

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DIFFERENTIAL PRESSURE

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Fig. 7 Power / Modbus communication indication

ATTENTION e status of the LEDs can be checked only when the unit is energised. Take the

relevant safety measures!

ATTENTION Green LED intensity can be adjusted between 0 and 100 % with a step of 10 %

according to the value set in Holding register 80.

OPERATING INSTRUCTIONS

NOTE For detailed information and settings, refer to the product Modbus register map,

which is attached to the article code on our website.

Calibration procedure:

1. Disconnect the nozzles and make sure they are not clogged.

2. ere are two options for starting the calibration process:

Either write “1” in holding register 70 or press button SW1 for 4 seconds until the

green LED2 and yellow LED3 on the printed circuit board blink twice and release it

immediately. If you hold SW1 for too long you will reset the Modbus registers! (see

Fig.8Sensor calibration and Modbus register reset).

3. After 2 seconds the green LED2 and yellow LED3 will blink twice once again

to indicate that the calibration procedure has ﬁnished (see Fig. 9 Calibration

Indication).

ATTENTION Make sure that the nozzles are disconnected and unobstructed.

Reset of Modbus registers procedure:

1. Press tact switch SW1 for 4 seconds until the green LED2 and yellow LED3 on the

printed circuit board blink twice and hold the switch until both LEDs blink again three

times (see Fig. 8 Sensor calibration and Modbus register reset).

2. e Modbus registers are reset to their default values (factory pre-set).

Fig. 8 Sensor calibration and Modbus register

reset Fig. 9 Calibration indication

SW1

HPS

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DIFFERENTIAL PRESSURE

PI CONTROLLER

NOTE Press and hold the tact switch until both LEDs on the PCB blink twice and hold

it until both LEDs blink again three times. If the tact switch is released before

both LEDs blink again three times, the sensor will have carried out a calibration

procedure instead of Modbus registers reset procedure.

Communication holding registers reset procedure:

1. Put the jumper onto pins 1 and 2 of the P4 connector for more than 20 s while

the device is powered (see Fig. 10 ).

Fig. 10 Modbus holding register reset jumper

2. Modbus communication holding registers from 1 to 3 will be reset to the default

values.

3. Remove the jumper.

ATTENTION Correct reading of air velocity is possible only if it is enabled by holding register

64 (Pitot air velocity) and a transmitter is connected to the appropriate Pitot tube

connection set (PSET-PTX-200).

ATTENTION Make sure that the nozzles are free and not connected.

LED indications (See Fig. 11):

1. When the green LED1 is on, the power supply is adequate and Modbus RTU

communication is active.

2. When the green LED2 is on, the actual diﬀerential pressure, air volume or air

velocity is stabilized between the minimum span and maximum span.

3. When the yellow LED3 is on, the diﬀerential pressure, air volume or air velocity

has exceeded the minimum or maximum span threshold.

4. When the red LED4 is on, the diﬀerential pressure, air volume or air velocity has

exceeded the minimum or maximum alarm threshold.

Fig. 11 LED indications

SW1

LED1

LED2

LED3

LED4

5. Sensor element failure indication:

In case of failure of sensor element or loss of communication with it, the red

LED4 blinks. See Fig. 12.

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