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Product short description:
  • Multi-range ±15V, ±75V, or ±150V input
  • 4-20mA outputs (sink/source)
  • 7-32V DC loop/local power

The SP238 model is a high-performance signal splitter that converts one high-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.

Description

The SP238 model is a high-performance signal splitter that converts one high-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 (Passive)

Default Configuration/Calibration:
Input: ±150V, medium filtering
Output: 4 to 20mA

Input Ranges and Accuracy:
Range                                     Accuracy* (typical)
±15V DC                                          ±0.05% of span
0-15V DC                                         ±0.05% of span
±150V / ±75 DC                             ±0.05% of span
0-150V                                             ±0.05% of span
0-5V 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: Greater than 1M ohms
Input Over-Voltage Protection: Bipolar Transient Voltage Suppressers (TVS), 220V working typical.
Input Resolution:
Bipolar input: 1 part in 50000 (±25000)
Unipolar input: 1 part in 25000
Input Filter: Selectable digital filtering settings (none, 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 (Two Signals, Passive)

Output Range: 4 to 20mA DC
Output Compliance:
Rload = (Vsupply – 7V) / 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:              88 milliseconds
Low filter:          100 milliseconds
Medium filter:  237 milliseconds
High filter:      1762 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.
Ex II 3 G Ex nA IIC T4 Gc -40°C ≤ Ta ≤ +80°C

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 ±15V, ±75V, and ±150V 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
Circuit Grounding & Why it's Important: Electrical Ground Rules Whitepaper (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 Ground Fault Circuit Interrupters Work & Protect Us from Shock: Electrical Ground Rules Whitepaper (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...
Ground as a Voltage Stabilizer & Transient Limiter: Electrical Ground Rules Whitepaper (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...
SP Series Windows Configuration Software (Log in to download the file)
Agility Config Tool (Tethered) (Log in to download the file)
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Additional information

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

SP238-0600: Signal Splitter

Configuration

Agility Mobile App, USB Configuration, Windows Software Configuration

Product Series

SP230 Series

Power

Local Power, Loop Power

  • Description

    Description

    The SP238 model is a high-performance signal splitter that converts one high-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 (Passive)

    Default Configuration/Calibration:
    Input: ±150V, medium filtering
    Output: 4 to 20mA

    Input Ranges and Accuracy:
    Range                                     Accuracy* (typical)
    ±15V DC                                          ±0.05% of span
    0-15V DC                                         ±0.05% of span
    ±150V / ±75 DC                             ±0.05% of span
    0-150V                                             ±0.05% of span
    0-5V 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: Greater than 1M ohms
    Input Over-Voltage Protection: Bipolar Transient Voltage Suppressers (TVS), 220V working typical.
    Input Resolution:
    Bipolar input: 1 part in 50000 (±25000)
    Unipolar input: 1 part in 25000
    Input Filter: Selectable digital filtering settings (none, 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 (Two Signals, Passive)

    Output Range: 4 to 20mA DC
    Output Compliance:
    Rload = (Vsupply – 7V) / 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:              88 milliseconds
    Low filter:          100 milliseconds
    Medium filter:  237 milliseconds
    High filter:      1762 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.
    Ex II 3 G Ex nA IIC T4 Gc -40°C ≤ Ta ≤ +80°C

    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 ±15V, ±75V, and ±150V 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

    Circuit Grounding & Why it's Important: Electrical Ground Rules Whitepaper (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 Ground Fault Circuit Interrupters Work & Protect Us from Shock: Electrical Ground Rules Whitepaper (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...
    Ground as a Voltage Stabilizer & Transient Limiter: Electrical Ground Rules Whitepaper (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

    SP Series Windows Configuration Software (Log in to download the file)
    Agility Config Tool (Tethered) (Log in to download the file)
  • Accessories

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      • DIN rail end stop for hazloc approvals
      $15
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      Agility™ Config Tool (Tethered)

      • Tethered Agility™ Config Tool mobile application
      • For Acromag SP Series Signal Splitters and most TT Series Transmitters
      • Download available on Google Play for free.
      • Download Windows configuration software from the software tab below.
      Read more
    • Compare

      PS5R: Slim Line Power Supplies

      • 10W, 15W, 30W, 60W, 90W, 120W, and 240W models
      • Universal Input (85-264V AC / 100-370V DC)
      • Lightweight and compact size
       
      $100$255
      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.
         
      $35
      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
      $180
      Select options
    • Compare

      USB Cables

      $20
      Select options
    • Compare

      USB Isolator

      • USB-powered, USB 2.0 and 1.1 compatible
      • 1500V AC / 2100V DC isolation
      • No drivers required
      This compact, industrial-grade isolator provides a high-voltage isolation barrier between a computer and a connected USB device.    
      $110
      Select options
  • Additional information

    Additional information

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

    SP238-0600: Signal Splitter

    Configuration

    Agility Mobile App, USB Configuration, Windows Software Configuration

    Product Series

    SP230 Series

    Power

    Local Power, Loop Power