Click to zoom

Please sign in or register to see model options and to add products to your cart.

Product short description:
  • Multi-range ±1V, ±5V, or ±10V input
  • 4-20mA outputs (sink/source)
  • 7-32V DC loop power

The SP237 model is a high-performance signal splitter that converts one process-level DC voltage input into two proportional isolated 4-20mA control signals. Power is received from one or both output loop currents.

Click here to watch a short video highlighting the features of the Acromag SP Series.

SP237: Two-Wire Process Voltage Input Signal Splitter Description

The SP237 model is a high-performance signal splitter that converts one process-level DC voltage input into two proportional isolated 4-20mA control signals. Power is received from one or both output loop currents.

Setup is fast and easy with a USB connection to your PC and our Windows software. Acromag’s Agility™ mobile app enables configuration on an Android smart phone or tablet. Software simplifies I/O range scaling, calibration, and advanced signal processing capabilities.

High-voltage isolation separates the input and between the output circuits. The isolation protects from surges, reduces noise, and eliminates ground loop errors.

These rugged instruments withstand harsh industrial environments to operate reliably across a wide temperature range with very low drift.They feature high immunity to RFI, EMI, ESD, and EFT, plus low radiated emissions.

Performance Specifications

IMPORTANT: To prevent ground loop error between a grounded PC and a grounded input signal, Acromag strongly recommends use of a USB isolator like Acromag’s USB-Isolator when configuring a SP230 Series transmitter.

USB Interface:

USB Connector: USB Mini-B type socket, 5-pin.

USB Data Rate: 12Mbps. USB v1.1 and 2.0 compatible.

USB Transient Protection: Transient voltage suppression on power and data lines.

USB Cable Length: 5.0 meters maximum.

Driver: Not required. Uses built-in Human Interface Device (HID) USB drivers of the Windows operating system.

Input

Default Configuration/Calibration
Input: ±10V DC, medium filter.
Output: 4 to 20mA.

Input Ranges and Accuracy
Range          Accuracy* (typical)
±1V DC               ±0.05% of span
±5V DC               ±0.05% of span
±10V DC            ±0.05% of span
*Error includes the effects of repeatability, terminal point conformity, and linearization.

Ambient Temperature Effect: Better than ±80ppm/°C (±0.008%/°C).

Zero Scaling Adjust: 0 to 95% of range, typical.

Full Scale Adjust: 5 to 100% of full scale range, typical.

Input Impedance
±1V input: 15M ohms.
±5V input: >1M ohms.
±10V input: >1M ohms.

Input Over-Voltage Protection: Bipolar Transient Voltage Suppressers (TVS), 14V working and 18V clamp level typical.

Input Resolution
Bipolar input: 1 part in 50000 (±25000).
Unipolar input: 1 part in 25000.

Input Filter: Selectable digital filtering settings (low, medium, high).

Input Filter Bandwidth
Normal mode plus digital filtering within the ADC.
Bandwidth (-3dB) varies with digital filter setting from 4Hz without filtering to 0.33Hz with high filtering.

Noise Rejection (Common Mode, High Filter): 138dB @ 60Hz, typical with 100 ohm input unbalance.

Output

Output Range: 4 to 20mA DC.

Output Compliance
Rload = (Vsupply – 11V) / 0.020A.
Rload = 0 to 850 ohms @ 24V DC.

Output Response Time (for step input change)
Time to reach 98% of final output value (typical)
No filter:              13 milliseconds
Low filter:           34 milliseconds
Medium filter: 133 milliseconds
High filter:       956 milliseconds

Environmental

Operating temperature: -40 to 80°C (-40° to 176°F).

Storage temperature: -40 to 85°C (-40 to 185°F).

Relative humidity: 5 to 95% non-condensing.

Power Requirement: 7-32V DC SELV (Safety Extra Low Voltage), 24mA max.

Isolation: 1500V AC peak. 250V AC (354V DC) continuous isolation between input and output circuits.

Shock and Vibration Immunity
Vibration: 4g, per IEC 60068-2-64.
Shock: 25g, per IEC 60068-2-27.

Electromagnetic Compatibility (EMC) Compliance
Radiated Emissions: BS EN 61000-6-4, CISPR 16.
RFI: BS EN 61000-6-2, IEC 61000-4-3.
Conducted RFI: BS EN 61000-6-2, IEC 61000-4-6.
ESD: BS EN 61000-6-2, IEC 61000-4-2.
EFT: BS EN 61000-6-2, IEC 61000-4-4.
Surge Immunity: BS EN 61000-6-2, IEC 61000-4-5.

Approvals
CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX/IECEx Zone 2.

Physical

General: General-purpose enclosure designed for mounting on 35mm “T-type” DIN rail.

Case Material: Self-extinguishing polyamide, UL94 V-0 rated, color light gray. General-purpose NEMA Type 1 enclosure.

I/O Connectors: Removable plug-in terminal blocks rated for 12A/250V; AWG #26-12, stranded or solid copper wire.

Dimensions: 17.5 x 114.5 x 99.0 mm (0.69 x 4.51 x 3.90 inches).

Shipping Weight: 0.22 kg (0.5 pounds) packed.

  • Easy configuration via USB with Windows software or Agility app for Android
  • Single unit accepts ±1V, ±5V, and ±10V DC input ranges
  • Input scales independently at each output
  • User-selectable filtering (none, low, med, high)
  • User-configurable output range clamp levels support NAMUR-compliant operation
  • Supports reverse-acting (inverse) output
  • Supports sink or source output wiring
  • Very low 7V two-wire loop burden
  • High accuracy, linearity, stability, and reliability
  • 1500V isolation
  • Space-saving 17.5mm (0.69 inch) design with pluggable terminals for easier wiring
  • Shock (25g) and vibration (4g) resistant
  • Wide ambient operation (-40 to 80°C)
  • CE compliant. UL/cUL Class I Div 2, ATEX / IECEx Zone 2 approvals
What is Circuit Grounding and Why is it Important? - 8500993 (Log in to view the file)
Why is circuit grounding important? This whitepaper is Part 1 of a three-part Grounding Electrical Equipment Best Practices series that looks at grounding and its role in protecting personnel, equipment, and ensuring the integrity of electrical signals. In this part, we will review circuit grounding and its importance to you, as well as the US...
How Do Ground Fault Circuit Interrupters Work & Protect Us from Shock? - 8500020 (Log in to view the file)
How do ground fault circuit interrupters work? This Electrical Ground Rules white paper is Part 2 of a three-part series that takes a look at grounding and its role in protecting personnel and equipment, and ensuring the integrity of electrical signals. In this part, we will examine our use of ground as a means of...
How does Ground Work as a Voltage Stabilizer and Transient Limiter? - 8501021 (Log in to view the file)
What is the role of ground as a voltage stabilizer and transient limiter? This Electrical Ground Rules whitepaper is Part 3 of a three-part series that takes a look at grounding and its role in protecting personnel and equipment, and ensuring the integrity of electrical signals. Consideration of ground can be very complex and application...
TTC-SIP: Software Interface Package Information Page (Log in to download the file)
SP Series Windows Configuration Software (Log in to download the file)
Agility Config Tool (Tethered) (Log in to download the file)
  • Compare

    SP230-Config/Cal

    Factory custom configuration/calibration service. Specify input type, input/output zero and full-scale values, filtering, and sensor fault settings on order.
    Select options
  • Compare

    TTBus-Kit: DIN Rail Bus Power Connector

    • One kit supports multiple TT330 series transmitters.
    • For multiple DT330/351 or SP330 transmitters, one TTBUS-KIT is required for each transmitter to be DC Power wired via the bus rail power connections.
       
    Select options
  • Compare

    TTC-SIP: Software

    • Software Interface Package for Acromag DT, ST, TT Series Transmitters and SP, uBSP Series Signal Splitters.
    • Includes configuration sofware CD-ROM (5040-xxx), isolator (USB-ISOLATOR) and two USB cable (4001-112, 4001-113) (Recommend one kit per customer.)
    • Easy setup and digital calibration via USB with Windows configuration software.
    • Download the configuration software only - from the Software Tab
    Select options
  • Compare

    USB Cables

    4001-112: USB cable, 1 meter, with Type A to Type B plugs. 4001-113: USB cable, 1 meter, with Type A to Mini-B plugs. 5028-565: USB-OTG cable, 6 inches
    Select options

Additional information

Weight 8 oz
Dimensions 4 × 4.75 × 1 in
Part Number

SP237-0600: Signal Splitter

Configuration

Agility Mobile App, USB Configuration, Windows Software Configuration

Product Series

SP230 Series

Power

Loop Power

  • Description

    SP237: Two-Wire Process Voltage Input Signal Splitter Description

    The SP237 model is a high-performance signal splitter that converts one process-level DC voltage input into two proportional isolated 4-20mA control signals. Power is received from one or both output loop currents.

    Setup is fast and easy with a USB connection to your PC and our Windows software. Acromag’s Agility™ mobile app enables configuration on an Android smart phone or tablet. Software simplifies I/O range scaling, calibration, and advanced signal processing capabilities.

    High-voltage isolation separates the input and between the output circuits. The isolation protects from surges, reduces noise, and eliminates ground loop errors.

    These rugged instruments withstand harsh industrial environments to operate reliably across a wide temperature range with very low drift.They feature high immunity to RFI, EMI, ESD, and EFT, plus low radiated emissions.

    Performance Specifications

    IMPORTANT: To prevent ground loop error between a grounded PC and a grounded input signal, Acromag strongly recommends use of a USB isolator like Acromag’s USB-Isolator when configuring a SP230 Series transmitter.

    USB Interface:

    USB Connector: USB Mini-B type socket, 5-pin.

    USB Data Rate: 12Mbps. USB v1.1 and 2.0 compatible.

    USB Transient Protection: Transient voltage suppression on power and data lines.

    USB Cable Length: 5.0 meters maximum.

    Driver: Not required. Uses built-in Human Interface Device (HID) USB drivers of the Windows operating system.

    Input

    Default Configuration/Calibration
    Input: ±10V DC, medium filter.
    Output: 4 to 20mA.

    Input Ranges and Accuracy
    Range          Accuracy* (typical)
    ±1V DC               ±0.05% of span
    ±5V DC               ±0.05% of span
    ±10V DC            ±0.05% of span
    *Error includes the effects of repeatability, terminal point conformity, and linearization.

    Ambient Temperature Effect: Better than ±80ppm/°C (±0.008%/°C).

    Zero Scaling Adjust: 0 to 95% of range, typical.

    Full Scale Adjust: 5 to 100% of full scale range, typical.

    Input Impedance
    ±1V input: 15M ohms.
    ±5V input: >1M ohms.
    ±10V input: >1M ohms.

    Input Over-Voltage Protection: Bipolar Transient Voltage Suppressers (TVS), 14V working and 18V clamp level typical.

    Input Resolution
    Bipolar input: 1 part in 50000 (±25000).
    Unipolar input: 1 part in 25000.

    Input Filter: Selectable digital filtering settings (low, medium, high).

    Input Filter Bandwidth
    Normal mode plus digital filtering within the ADC.
    Bandwidth (-3dB) varies with digital filter setting from 4Hz without filtering to 0.33Hz with high filtering.

    Noise Rejection (Common Mode, High Filter): 138dB @ 60Hz, typical with 100 ohm input unbalance.

    Output

    Output Range: 4 to 20mA DC.

    Output Compliance
    Rload = (Vsupply – 11V) / 0.020A.
    Rload = 0 to 850 ohms @ 24V DC.

    Output Response Time (for step input change)
    Time to reach 98% of final output value (typical)
    No filter:              13 milliseconds
    Low filter:           34 milliseconds
    Medium filter: 133 milliseconds
    High filter:       956 milliseconds

    Environmental

    Operating temperature: -40 to 80°C (-40° to 176°F).

    Storage temperature: -40 to 85°C (-40 to 185°F).

    Relative humidity: 5 to 95% non-condensing.

    Power Requirement: 7-32V DC SELV (Safety Extra Low Voltage), 24mA max.

    Isolation: 1500V AC peak. 250V AC (354V DC) continuous isolation between input and output circuits.

    Shock and Vibration Immunity
    Vibration: 4g, per IEC 60068-2-64.
    Shock: 25g, per IEC 60068-2-27.

    Electromagnetic Compatibility (EMC) Compliance
    Radiated Emissions: BS EN 61000-6-4, CISPR 16.
    RFI: BS EN 61000-6-2, IEC 61000-4-3.
    Conducted RFI: BS EN 61000-6-2, IEC 61000-4-6.
    ESD: BS EN 61000-6-2, IEC 61000-4-2.
    EFT: BS EN 61000-6-2, IEC 61000-4-4.
    Surge Immunity: BS EN 61000-6-2, IEC 61000-4-5.

    Approvals
    CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX/IECEx Zone 2.

    Physical

    General: General-purpose enclosure designed for mounting on 35mm “T-type” DIN rail.

    Case Material: Self-extinguishing polyamide, UL94 V-0 rated, color light gray. General-purpose NEMA Type 1 enclosure.

    I/O Connectors: Removable plug-in terminal blocks rated for 12A/250V; AWG #26-12, stranded or solid copper wire.

    Dimensions: 17.5 x 114.5 x 99.0 mm (0.69 x 4.51 x 3.90 inches).

    Shipping Weight: 0.22 kg (0.5 pounds) packed.

  • Features & Benefits

    • Easy configuration via USB with Windows software or Agility app for Android
    • Single unit accepts ±1V, ±5V, and ±10V DC input ranges
    • Input scales independently at each output
    • User-selectable filtering (none, low, med, high)
    • User-configurable output range clamp levels support NAMUR-compliant operation
    • Supports reverse-acting (inverse) output
    • Supports sink or source output wiring
    • Very low 7V two-wire loop burden
    • High accuracy, linearity, stability, and reliability
    • 1500V isolation
    • Space-saving 17.5mm (0.69 inch) design with pluggable terminals for easier wiring
    • Shock (25g) and vibration (4g) resistant
    • Wide ambient operation (-40 to 80°C)
    • CE compliant. UL/cUL Class I Div 2, ATEX / IECEx Zone 2 approvals
  • Tech Papers

    What is Circuit Grounding and Why is it Important? - 8500993 (Log in to view the file)
    Why is circuit grounding important? This whitepaper is Part 1 of a three-part Grounding Electrical Equipment Best Practices series that looks at grounding and its role in protecting personnel, equipment, and ensuring the integrity of electrical signals. In this part, we will review circuit grounding and its importance to you, as well as the US...
    How Do Ground Fault Circuit Interrupters Work & Protect Us from Shock? - 8500020 (Log in to view the file)
    How do ground fault circuit interrupters work? This Electrical Ground Rules white paper is Part 2 of a three-part series that takes a look at grounding and its role in protecting personnel and equipment, and ensuring the integrity of electrical signals. In this part, we will examine our use of ground as a means of...
    How does Ground Work as a Voltage Stabilizer and Transient Limiter? - 8501021 (Log in to view the file)
    What is the role of ground as a voltage stabilizer and transient limiter? This Electrical Ground Rules whitepaper is Part 3 of a three-part series that takes a look at grounding and its role in protecting personnel and equipment, and ensuring the integrity of electrical signals. Consideration of ground can be very complex and application...
  • Specs & Data Sheets

  • Software

    TTC-SIP: Software Interface Package Information Page (Log in to download the file)
    SP Series Windows Configuration Software (Log in to download the file)
    Agility Config Tool (Tethered) (Log in to download the file)
  • Accessories

    • Compare

      SP230-Config/Cal

      Factory custom configuration/calibration service. Specify input type, input/output zero and full-scale values, filtering, and sensor fault settings on order.
      Select options
    • Compare

      TTBus-Kit: DIN Rail Bus Power Connector

      • One kit supports multiple TT330 series transmitters.
      • For multiple DT330/351 or SP330 transmitters, one TTBUS-KIT is required for each transmitter to be DC Power wired via the bus rail power connections.
         
      Select options
    • Compare

      TTC-SIP: Software

      • Software Interface Package for Acromag DT, ST, TT Series Transmitters and SP, uBSP Series Signal Splitters.
      • Includes configuration sofware CD-ROM (5040-xxx), isolator (USB-ISOLATOR) and two USB cable (4001-112, 4001-113) (Recommend one kit per customer.)
      • Easy setup and digital calibration via USB with Windows configuration software.
      • Download the configuration software only - from the Software Tab
      Select options
    • Compare

      USB Cables

      4001-112: USB cable, 1 meter, with Type A to Type B plugs. 4001-113: USB cable, 1 meter, with Type A to Mini-B plugs. 5028-565: USB-OTG cable, 6 inches
      Select options
  • Additional information

    Additional information

    Weight 8 oz
    Dimensions 4 × 4.75 × 1 in
    Part Number

    SP237-0600: Signal Splitter

    Configuration

    Agility Mobile App, USB Configuration, Windows Software Configuration

    Product Series

    SP230 Series

    Power

    Loop Power