892M, 894M: DC Voltage/Current Output Math Module

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$565 – $735

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Product short description:
  • 2 or 4 input channels, 0 to 20mA DC, 0 to 10V DC (selectable ranges)
  • 0 to 20mA DC, 0 to 10V DC (selectable ranges) output
  • 10-36V DC power
  • Software configured, computes arithmetic operations, evaluates conditional and Boolean arguments, executes track & hold functions

 

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892M, 894M Math Module with DC Voltage / Current Output Description

IntelliPack math modules perform complex mathematical computations and convert DC input signals to scaled DC or frequency outputs. They are ideal for isolating and interfacing analog signals to a PLC or controller as a voltage, current, or a pulsed input. Typical applications include calculating a sum, delta’s, average, flow rate, volume, weight, power, and other scaled or computed variables.

Math modules are available with either DC voltage/current output or frequency/pulse-width modulated output. Each output (DC, frequency, and relay channels) is controlled by a unique, user defined equation.

The math/computation equations are entered into the IntelliPack configuration software in a free form format, the same as in most popular spreadsheet programs. A simulator screen provides instant feedback to test equations and see the output response before actual installation.

Performance

General

Analog to Digital (A/D) Converter: 16-bit Σ-Δ A/D converter
Ambient Temperature Effect: Better than ±0.005% of input span per °C or ±1μV, whichever is greater.
Noise Rejection:
Normal Mode: 40dB @ 60Hz, 100 ohm unbalance
Common Mode: 100dB @ 60Hz, .100 ohm unbalance
(49.9 ohm unbalance for process current inputs)
Response Time (for input step change): 800mS typical to 98% of final output value
Input Over-voltage Protection: Bipolar Transient Voltage Suppressors (TVS)

DC Current Input

DC Current Input Ranges:
Input Ranges          Resolution
0 to 1mA DC                   0.0370%
0 to 20mA DC                0.0025%
4 to 20mA DC                0.0025%

DC Current Input Impedance: 49.9 ohms
DC Current Input Accuracy:
Better than 0.05% of input span, typical
Better than 0.3% of input span typ. for 0-1mA range

DC Voltage Input

DC Voltage Input Ranges:
Input Ranges          Resolution
0 to 5V DC                      0.0030%
0 to 10V DC                    0.0025%

Input impedance: Greater than 500K ohms
DC Voltage Input Accuracy: better than ±0.05% of input span, typical

Output (DC V/mA)

D/A Converter: 16-bit Σ-Δ
Current Output:
Ranges: 0-1mA, 0-20mA, 4-20mA
Compliance: 10V minimum (500 ohm load)
Accuracy: 0.025% of span (0-1mA: 0.3% of span)
Voltage Output:
Ranges: 0-5V, 0-10V
Compliance: 10mA maximum with short circuit protection. 1 ohm output impedance
Accuracy: 0.025% of span
Accuracy (overall input to output):
Better than 0.075% of span, typical.
Better than 0.5% of span for 0-1mA, typical

Environmental

Ambient Temperature:
Operating: -25 to 70°C (-13 to 158°F)
Storage: -40 to 85°C (-40 to 185°F)
Relative Humidity: 5 to 95%
Power Requirements: 10 to 36V DC. 120mA @ 24V. 200mA @ 15V
Isolation (optical):
3-way (input/output/power)
Input circuits share a common
1500V AC peak or 250V AC (354V DC) continuous
Radiated Field Immunity (RFI): EN61000-4-3, EN50082-1
Electromagnetic Field Immunity (EMI):
Less than ±0.25% of output span effect under the influence of electromagnetic fields from switching solenoids, commutator motors, and drill motors.
Electrical Fast Transient (EFT): EN61000-4-4, EN50082-1
Surge Withstanding Capability (SWC): EN61000-4-5, EN50082-1
Electrostatic Discharge (ESD): EN61000-4-2, EN50082-1
Radiated Emissions: EN50081-1 for Class B equipment
Approvals:
UL listed
cUL listed
Hazardous Loc.: Class I; Division 2; Groups A, B, C, D

Configuration

Software Configuration: Units are fully programmable via the Windows 7 or newer IntelliPack Configuration Program. Configuration downloads from PC through EIA232 serial port using Acromag 800C-SIP kit.
LED Indicators: LEDs indicate power and status.

Physical

Enclosure: Case: Self-extinguishing NYLON type 6.6 polyamide thermoplastic UL94 V-2, color beige; general purpose NEMA Type 1 enclosure.
Connectors (Removable terminal blocks): Wire Range: AWG #14-22 (AWG #12 stranded only)
Printed Circuit Boards: Military grade FR-4 epoxy glass circuit board
Dimensions
1.05W x 4.68H x 4.35D inches
26.7W x 118.9H x 110.5D millimeters
Shipping Weight: 1 pound (0.45 Kg) packed

 

  • Universal DC analog I/O ranges provide flexibility for changing application requirements.
  • Individual channel input/output scaling displays signal values in engineering units.
  • Track and hold function enables easy identification of critical events and their corresponding signal values.
  • 200-character equation fields (50-char. max. on 895/896M) support complex transfer functions.
  • Software simulation feature allows off-line testing of equations to quickly check output signal response for a variety of conditions.
  • Diagnostic LEDs provide quick, visual indication of an out-of-range input value.
  • Pulse-width modulation capability allows the user to vary the output signal’s pulse width on a user-defined carrier frequency.
  • Solid-state relays provide on/off control or local alarms with fail-safe/ non fail-safe capability

 

How to Use an AC Current Sensor Application Note
Using Acromag’s AC Current Sensor Model 5020-350 Transmitters with DC current input can be used used in conjunction with an external AC Current Sensor to precondition an AC current input signal. This sensor is a highly accurate toroidal instrument transformer that converts an AC current signal to a safe, low-level, DC milliampere signal (0 to 11.17mA)....
How to Calculate the Discharge Rate Q (g.p.h.) Output of a V-notch Weir Application Note
Defining the Problem: Calculate the discharge rate Q (g.p.h.) output of a V-notch weir. Provide a 4-20mA output for flowrate and frequency output for totalization and alarm output for high-level alarm. Solution: Model 892M-0500 DC output math module Model 895M-0800 freq. output math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply  ...
How to Scale and Sum up to Four 4-20mA Signals from Flow Sensors Application Note
Defining the Problem: Scaling and summing up to four 4-20mA signals from flow sensors. Solution: Model 894M-0500 quad-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply
How to Monitor RTDs for Temperature Differential Application Note
Defining the Problem: Monitor three RTD’s on a stack and transmit two differential 4-20mA signals representing -7 to 18°F. Each RTD transmitter is calibrated -20 to 120°F. Solution: Model 892M-0500 math module (qty. 3) Model 800C-SIP software interface pkg. (qty. 1) Model PS5R-VD24 power supply (qty. 1)   Download PDF for complete application note.
How to Transmit the Dosing Percentage (ratio) of an Additive Based on Total Flow of Effluent Application Note
Defining the Problem: Transmitting the dosing percentage (ratio) of an additive based upon total flow of effluent. Solution: Model 892M-0500 dual-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply
How to Take the Square Root and Sum up to Four 4-20mA Signals from Flow Sensors Application Note
Defining the Problem: Taking the square root and summing up to four 4-20mA signals from flow sensors. Solution: Model 894M-0500 quad-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply
How to Convert a 4-20mA Level Signal to a 4-20mA Signal Proportional to Volume Application Note
Defining the Problem: Convert a 4-20mA level signal (proportional to height) to a 4-20mA signal proportional to volume. Solution: Model 892M-0500 dual-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply     Download PDF for complete application note.

Specifications

892M, 894M Data Sheet with Overview

Manuals

892M, 894M User Manual (Log in to download the file)

How to Use SIIG USB-to-Serial Cable With Windows Tech Note (Log in to download the file)

Brochures

890M Brochure

Drawings & Diagrams

892M, 894M DXF, DWG File Download (134 KB)

IntelliPack Configuration Software 5030-881 (Log in to download the file)
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    • Highly accurate toroidal instrument transformer that converts an AC current signal to a safe, low level, DC milliampere signal (0 to 11.17mA).
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    • USB-to-RS232 Adapter
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    • Interface Cable
         
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    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
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    • Simplifies wiring connections on Acromag I/O Modules
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    • Provide safe and secure wiring connections
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Additional information

Weight 11 oz
Dimensions 5 × 1.25 × 4.5 in
Part Number

892M-0500: two inputs, 892M-0500-C: two inputs with factory calibration, 894M-0500: four inputs, 894M-0500-C: four inputs with factory calibration
Configuration

Windows Software Configuration
Product Series

IntelliPack 800 Series
Power

DC Power, External Power

  • Description

    892M, 894M Math Module with DC Voltage / Current Output Description

    IntelliPack math modules perform complex mathematical computations and convert DC input signals to scaled DC or frequency outputs. They are ideal for isolating and interfacing analog signals to a PLC or controller as a voltage, current, or a pulsed input. Typical applications include calculating a sum, delta’s, average, flow rate, volume, weight, power, and other scaled or computed variables.

    Math modules are available with either DC voltage/current output or frequency/pulse-width modulated output. Each output (DC, frequency, and relay channels) is controlled by a unique, user defined equation.

    The math/computation equations are entered into the IntelliPack configuration software in a free form format, the same as in most popular spreadsheet programs. A simulator screen provides instant feedback to test equations and see the output response before actual installation.

    Performance

    General

    Analog to Digital (A/D) Converter: 16-bit Σ-Δ A/D converter
    Ambient Temperature Effect: Better than ±0.005% of input span per °C or ±1μV, whichever is greater.
    Noise Rejection:
    Normal Mode: 40dB @ 60Hz, 100 ohm unbalance
    Common Mode: 100dB @ 60Hz, .100 ohm unbalance
    (49.9 ohm unbalance for process current inputs)
    Response Time (for input step change): 800mS typical to 98% of final output value
    Input Over-voltage Protection: Bipolar Transient Voltage Suppressors (TVS)

    DC Current Input

    DC Current Input Ranges:
    Input Ranges          Resolution
    0 to 1mA DC                   0.0370%
    0 to 20mA DC                0.0025%
    4 to 20mA DC                0.0025%

    DC Current Input Impedance: 49.9 ohms
    DC Current Input Accuracy:
    Better than 0.05% of input span, typical
    Better than 0.3% of input span typ. for 0-1mA range

    DC Voltage Input

    DC Voltage Input Ranges:
    Input Ranges          Resolution
    0 to 5V DC                      0.0030%
    0 to 10V DC                    0.0025%

    Input impedance: Greater than 500K ohms
    DC Voltage Input Accuracy: better than ±0.05% of input span, typical

    Output (DC V/mA)

    D/A Converter: 16-bit Σ-Δ
    Current Output:
    Ranges: 0-1mA, 0-20mA, 4-20mA
    Compliance: 10V minimum (500 ohm load)
    Accuracy: 0.025% of span (0-1mA: 0.3% of span)
    Voltage Output:
    Ranges: 0-5V, 0-10V
    Compliance: 10mA maximum with short circuit protection. 1 ohm output impedance
    Accuracy: 0.025% of span
    Accuracy (overall input to output):
    Better than 0.075% of span, typical.
    Better than 0.5% of span for 0-1mA, typical

    Environmental

    Ambient Temperature:
    Operating: -25 to 70°C (-13 to 158°F)
    Storage: -40 to 85°C (-40 to 185°F)
    Relative Humidity: 5 to 95%
    Power Requirements: 10 to 36V DC. 120mA @ 24V. 200mA @ 15V
    Isolation (optical):
    3-way (input/output/power)
    Input circuits share a common
    1500V AC peak or 250V AC (354V DC) continuous
    Radiated Field Immunity (RFI): EN61000-4-3, EN50082-1
    Electromagnetic Field Immunity (EMI):
    Less than ±0.25% of output span effect under the influence of electromagnetic fields from switching solenoids, commutator motors, and drill motors.
    Electrical Fast Transient (EFT): EN61000-4-4, EN50082-1
    Surge Withstanding Capability (SWC): EN61000-4-5, EN50082-1
    Electrostatic Discharge (ESD): EN61000-4-2, EN50082-1
    Radiated Emissions: EN50081-1 for Class B equipment
    Approvals:
    UL listed
    cUL listed
    Hazardous Loc.: Class I; Division 2; Groups A, B, C, D

    Configuration

    Software Configuration: Units are fully programmable via the Windows 7 or newer IntelliPack Configuration Program. Configuration downloads from PC through EIA232 serial port using Acromag 800C-SIP kit.
    LED Indicators: LEDs indicate power and status.

    Physical

    Enclosure: Case: Self-extinguishing NYLON type 6.6 polyamide thermoplastic UL94 V-2, color beige; general purpose NEMA Type 1 enclosure.
    Connectors (Removable terminal blocks): Wire Range: AWG #14-22 (AWG #12 stranded only)
    Printed Circuit Boards: Military grade FR-4 epoxy glass circuit board
    Dimensions
    1.05W x 4.68H x 4.35D inches
    26.7W x 118.9H x 110.5D millimeters
    Shipping Weight: 1 pound (0.45 Kg) packed

     

  • Features & Benefits

    • Universal DC analog I/O ranges provide flexibility for changing application requirements.
    • Individual channel input/output scaling displays signal values in engineering units.
    • Track and hold function enables easy identification of critical events and their corresponding signal values.
    • 200-character equation fields (50-char. max. on 895/896M) support complex transfer functions.
    • Software simulation feature allows off-line testing of equations to quickly check output signal response for a variety of conditions.
    • Diagnostic LEDs provide quick, visual indication of an out-of-range input value.
    • Pulse-width modulation capability allows the user to vary the output signal’s pulse width on a user-defined carrier frequency.
    • Solid-state relays provide on/off control or local alarms with fail-safe/ non fail-safe capability

     

  • Tech Papers

    How to Use an AC Current Sensor Application Note
    Using Acromag’s AC Current Sensor Model 5020-350 Transmitters with DC current input can be used used in conjunction with an external AC Current Sensor to precondition an AC current input signal. This sensor is a highly accurate toroidal instrument transformer that converts an AC current signal to a safe, low-level, DC milliampere signal (0 to 11.17mA)....
    How to Calculate the Discharge Rate Q (g.p.h.) Output of a V-notch Weir Application Note
    Defining the Problem: Calculate the discharge rate Q (g.p.h.) output of a V-notch weir. Provide a 4-20mA output for flowrate and frequency output for totalization and alarm output for high-level alarm. Solution: Model 892M-0500 DC output math module Model 895M-0800 freq. output math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply  ...
    How to Scale and Sum up to Four 4-20mA Signals from Flow Sensors Application Note
    Defining the Problem: Scaling and summing up to four 4-20mA signals from flow sensors. Solution: Model 894M-0500 quad-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply
    How to Monitor RTDs for Temperature Differential Application Note
    Defining the Problem: Monitor three RTD’s on a stack and transmit two differential 4-20mA signals representing -7 to 18°F. Each RTD transmitter is calibrated -20 to 120°F. Solution: Model 892M-0500 math module (qty. 3) Model 800C-SIP software interface pkg. (qty. 1) Model PS5R-VD24 power supply (qty. 1)   Download PDF for complete application note.
    How to Transmit the Dosing Percentage (ratio) of an Additive Based on Total Flow of Effluent Application Note
    Defining the Problem: Transmitting the dosing percentage (ratio) of an additive based upon total flow of effluent. Solution: Model 892M-0500 dual-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply
    How to Take the Square Root and Sum up to Four 4-20mA Signals from Flow Sensors Application Note
    Defining the Problem: Taking the square root and summing up to four 4-20mA signals from flow sensors. Solution: Model 894M-0500 quad-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply
    How to Convert a 4-20mA Level Signal to a 4-20mA Signal Proportional to Volume Application Note
    Defining the Problem: Convert a 4-20mA level signal (proportional to height) to a 4-20mA signal proportional to volume. Solution: Model 892M-0500 dual-input math module Model 800C-SIP software interface package Optional: Model PS5R-VD24 power supply     Download PDF for complete application note.

  • Specs & Data Sheets

    Specifications

    892M, 894M Data Sheet with Overview

    Manuals

    892M, 894M User Manual (Log in to download the file)

    How to Use SIIG USB-to-Serial Cable With Windows Tech Note (Log in to download the file)

    Brochures

    890M Brochure

    Drawings & Diagrams

    892M, 894M DXF, DWG File Download (134 KB)

  • Software

    IntelliPack Configuration Software 5030-881 (Log in to download the file)

  • Accessories

    • Compare
      Compare

      20RM-16-DIN: 19” rack-mount kit with DIN rail

      • 19" rack-mount kit with DIN rail
      $190
      Select options
    • Compare
      Compare

      4001-095: USB-to-Serial Adapter

      • USB-to-serial adapter
      • Easy to use to setup and re-configure modules
      $45
      Select options
    • Compare
      Compare

      5020-350: Toroidal AC Current Sensor

      • AC Current Sensor to precondition an AC current input signal
      • Highly accurate toroidal instrument transformer that converts an AC current signal to a safe, low level, DC milliampere signal (0 to 11.17mA).
      $50
      Select options
    • Compare
      Compare

      5030 Cable Series

      • Various specialty cables
      $25 – $100
      Select options
    • Compare
      Compare

      5030-881

      • IntelliPack 800 Series software on CD-ROM
      $65
      Select options
    • Compare
      Compare

      800C-SIP: IntelliPack Configuration Software

      • Configuration Software
      • USB-to-RS232 Adapter
      • RS232-to-RJ11 Adapter
      • Interface Cable
           
      $310
      Select options
    • Compare
      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
      Compare

      Terminal Block Replacements

      • Simplifies wiring connections on Acromag I/O Modules
      • Barrier strip or spring clamp terminal block kits
      • Provide safe and secure wiring connections
      $35 – $45
      Select options

  • Additional information

    Additional information

    Weight 11 oz
    Dimensions 5 × 1.25 × 4.5 in
    Part Number

    892M-0500: two inputs, 892M-0500-C: two inputs with factory calibration, 894M-0500: four inputs, 894M-0500-C: four inputs with factory calibration
    Configuration

    Windows Software Configuration
    Product Series

    IntelliPack 800 Series
    Power

    DC Power, External Power