Digi Connect Sensor Wiring Manual

Digi Connect Sensor Wiring Manual

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Digi Connect® Sensor
I/O Wiring Guide

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Summary of Contents for Digi Connect Sensor

  • Page 1 Digi Connect® Sensor I/O Wiring Guide...
  • Page 2: Customer Support

    Information in this document is subject to change without notice and does not represent a commitment on the part of Digi International. Digi provides this document “as is,” without warranty of any kind, expressed or implied, including, but not limited to, the implied warranties of fitness or merchantability for a particular purpose.
  • Page 3: Table Of Contents

    Contents Digi Connect® Sensor About the Connect Sensor I/O interface Connect Sensor hardware replacement Digi Device Cloud and Digi Remote Manager Safety notices and certifications CSENSE Continuous Monitoring firmware Use a Modbus-enabled device with CSENSE Continuous Monitoring firmware I/O interface pin assignments...
  • Page 4: Digi Connect® Sensor

    You can sign in to your Remote Manager account to view the reports or use the Digi Connect Wizard app on a mobile device and pair it with a nearby Connect Sensor to view real-time sensor and device data in the field.
  • Page 5: About The Connect Sensor I/O Interface

    About the Connect Sensor I/O interface You can wire analog and digital inputs and outputs on the Connect Sensor general purpose I/O interface. Note If you are using a Modbus-enabled external sensor device, you must wire the sensor device to a serial output.
  • Page 6: Use A Modbus-Enabled Device With Csense Continuous Monitoring Firmware

    If you have a Modbus-enabled device that must get power from Connect Sensor, the Modbus device must be wired to the serial power output. However, if you have updated Connect Sensor with the CSENSE Continuous Monitoring firmware option, the Modbus device must be wired to A1 Pwr (analog interface 1 power output).
  • Page 7: I/O Interface Pin Assignments

    I/O interface pin assignments Connect Sensor has two I/O connectors—a 9-pin connector and a 12-pin connector. The pin assignments and signals are shown in the following images and tables. 9-pin connector details Digi Connect® Sensor I/O Wiring Guide...
  • Page 8: 12-Pin Connector Details

    A4 IN Analog interface 4, analog input A4 Pwr Analog interface 4, power output A3 GND Analog interface 3, ground A3 IN Analog interface 3, analog input A3 Pwr Analog interface 3, power output Digi Connect® Sensor I/O Wiring Guide...
  • Page 9 A2 IN Analog interface 2, analog input A2 Pwr Analog interface 2, power output A1 GND Analog interface 1, ground A1 IN Analog interface 1, analog input A1 Pwr Analog interface 1, power output Digi Connect® Sensor I/O Wiring Guide...
  • Page 10: Wire Sensors To The I/O Interface

    Wire sensors to the I/O interface To wire third-party sensors to the Connect Sensor I/O interface, you need the following equipment: A slot-headed 0.4 x 2.5 x 80 mm screwdriver Wire size 1.29-0.25 mm (16-30 AWG) for each pin connector Note All external or field wiring must be in accordance with NFPA 70 Article 501.10(B).
  • Page 11 Over tightening an unused cable gland cap can force out the plastic hole cover, unsealing the cable gland. 3. Run the sensor cable through the cap and thread it through the cable gland. Digi Connect® Sensor I/O Wiring Guide...
  • Page 12: Wire Sensors To The I/O Interface

    5. Slide the wire into the terminal side of the connector. 6. Tighten the screw to 0.2 N-m to secure the wire to the connector. 7. Tighten the cap to the cable gland to seal and secure the wire. Digi Connect® Sensor I/O Wiring Guide...
  • Page 13: Power Options

    The following sections provide details about powering Connect Sensor and its sensors. Power Connect Sensor While Connect Sensor has an internal battery for power, you can use an external power source, such as solar panels or other DC sources. For an external power source, use the external power input to power the Connect Sensor device.
  • Page 14 Power options Power the sensors Note When using continuous monitoring, the combined maximum output current for ALL sensors is 200 mA. Digi Connect® Sensor I/O Wiring Guide...
  • Page 15: Analog Input

    Analog input The analog inputs have the following modes of operation, which are disabled by default. You can enable or disable the modes, but use only one mode for each input. Voltage input Current loop Digi Connect® Sensor I/O Wiring Guide...
  • Page 16: Voltage Input

    Analog input Voltage input Voltage input Connect Sensor can monitor a voltage input from 0 V to 10 V. The following schematics show wiring options for 0-10 V input. Self-powered This figure shows the schematic when the external sensor is self-powered or powered from a source other than Connect Sensor.
  • Page 17: Self-Powered

    Analog input Current loop the current loop. If a HART sensor is connected to analog current loop 2, 3, or 4, Connect Sensor reports on the current loop only. Self-powered This figure shows the schematic when the external sensor is self-powered or powered from a source other than Connect Sensor.
  • Page 18: 3-Wire Sensors

    (Power to Analog Input) when the Analog Output voltage is set to 24 V. The nominal internal resistance of Connect Sensor is 375 ohms, but may vary across current flow and temperature. Max: 24 V – (4 mA *375 ohms) ≈ 22.5 V Min: 24 V - (20 mA *375 ohms) ≈...
  • Page 19: Digital I/O

    Digital I/O Connect Sensor has one digital I/O pin. You can configure the pin as a digital input, pulse counter, or digital output, but not more than one I/O function simultaneously. Digital input and pulse counter Digital output Digi Connect® Sensor I/O Wiring Guide...
  • Page 20: Digital Input And Pulse Counter

    Input mode: Connect Sensor gets the digital input value at scheduled sensor readings. You can configure it to send an alarm report for specific input values or when an input value changes. You can also configure Connect Sensor to wake from sleep mode when an input value changes (rising edge or falling edge wake).
  • Page 21: Digital Output

    When configuring the digital I/O pin as a digital output, it is an open collector output with an optional pull-up resistor. A self-resetting fuse limits the maximum collector current to 750 mA. The following image shows a schematic of the typical digital-out application. Digi Connect® Sensor I/O Wiring Guide...
  • Page 22: Modbus Serial Power Output

    For detailed information about implementing Modbus over a serial line, refer to the Modbus documentation at www.modbus.org. The schematic below shows how to wire the device, depending on the power source for the Modbus device: Connect Sensor or powered from a source other than Connect Sensor. Digi Connect® Sensor I/O Wiring Guide...
  • Page 23: I/O Schematics

    I/O schematics The following sections show electrical wiring schematics for the Connect Sensor I/O connectors. Analog input schematic Digital I/O schematic Digi Connect® Sensor I/O Wiring Guide...
  • Page 24 Analog input schematic The following image is an overview of the analog input wiring diagrams.
  • Page 25 Digital I/O schematic The following image is an overview of the digital I/O wiring diagrams.

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