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Sentera Controls SPD Mounting And Operating Instructions

Dual differential pressure transmitter
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SPD
DUAL DIFFERENTIAL
PRESSURE
TRANSMITTER
Mounting and operating instructions

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Summary of Contents for Sentera Controls SPD

  • Page 1 DUAL DIFFERENTIAL PRESSURE TRANSMITTER Mounting and operating instructions...

  • Page 2: Table Of Contents

    TECHNICAL DATA STANDARDS OPERATIONAL DIAGRAM WIRING AND CONNECTIONS MOUNTING INSTRUCTIONS IN STEPS VERIFICATION OF THE INSTALLATION INSTRUCTIONS OPERATING INSTRUCTIONS MODBUS REGISTER MAPS TRANSPORT AND STORAGE WARRANTY AND RESTRICTIONS MAINTENANCE MIW-SPD-EN-000 - 02 / 07 / 2019 2 - 14 www.sentera.eu...

  • Page 3: Safety And Precautions

    In case there are any questions that are not answered, please contact your technical support or consult a professional. MIW-SPD-EN-000 - 02 / 07 / 2019 3 - 14 www.sentera.eu...

  • Page 4: Product Description

    DUAL DIFFERENTIAL PRESSURE TRANSMITTER PRODUCT DESCRIPTION The SPD series are compact dual multi-range differential pressure transmitters providing analogue / digital output for each sensor and Modbus RTU communication. The transmitters have two built-in state-of-the-art silicon pressure sensors with eight switchable measuring ranges. The SPD piezoresistive transducers are temperature and pressure compensated thus providing high degree of accuracy and reliability.

  • Page 5: Standards

    Ground Analogue / digital output 2 Cable cross section 1,5 mm Connections Cable gland clamping range 3,5 mm Connecting tube diameter 6—7 mm MIW-SPD-EN-000 - 02 / 07 / 2019 5 - 14 www.sentera.eu back to the table of contents...

  • Page 6: Mounting Instructions In Steps

    GND terminals of G and F-type devices together. MOUNTING INSTRUCTIONS IN STEPS Before you start mounting the SPD dual differential pressure transmitter, read carefully “Safety and Precautions”. Choose a smooth surface for installation location (a wall, panel, etc.) and follow these steps: Unscrew the front cover of the housing to remove it.
  • Page 7 By default, the NBT jumper is disconnected – see Fig. 6 Network Bus Terminator resistance jumper. ■ Put back the cover and fix it. ■ Switch on the power supply. MIW-SPD-EN-000 - 02 / 07 / 2019 7 - 14 www.sentera.eu back to the table of contents...

  • Page 8: Verification Of The Installation Instructions

    “Settings and indications”. The status of the LEDs can be checked only when the unit is energised. Take the ATTENTION relevant safety measures! MIW-SPD-EN-000 - 02 / 07 / 2019 8 - 14 www.sentera.eu back to the table of contents...

  • Page 9: Operating Instructions

    LEDs will blink three times once again to indicate that the Modbus holding registers have been reset to their default values. ATTENTION Make sure that the nozzles are free and not connected. MIW-SPD-EN-000 - 02 / 07 / 2019 9 - 14 www.sentera.eu back to the table of contents...

  • Page 10: Modbus Register Maps

    0,5 s Diff. pressure response time – Sensor 2 unsigned int. Flag indicates the current response time of Sensor 2 19-20 Reserved, return 0 MIW-SPD-EN-000 - 02 / 07 / 2019 10 - 14 www.sentera.eu back to the table of contents...
  • Page 11 / drive type for Sensor 2 28-30 Reserved, return 0 If you want to find out more about Modbus over serial line, please visit: http://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf MIW-SPD-EN-000 - 02 / 07 / 2019 11 - 14 www.sentera.eu back to the table of contents...
  • Page 12 Holding registers 11 determines the mode for Sensor 1. Sending command “Write Single Register” with address ‘11’ and data ‘2 ‘sets the Sensor 1 of SPD to Modbus Mode. In Modbus Mode the range and response time settings are controlled via Modbus only (in Standalone mode these settings are controlled by the on-board jumpers).
  • Page 13 ‘0’, otherwise it is ‘1’. This register accepts values between ‘-100’ and ‘2.000’ for SPD-X-2K0 and between ‘0’ and ‘6.000’ for SPD-X-6K0. If a value out of this range is written, the registers returns to its default value. The minimum limit also depends on the current range.

  • Page 14: Transport And Storage

    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. MIW-SPD-EN-000 - 02 / 07 / 2019 14 - 14 www.sentera.eu...

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