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Product short description:
  • 4 input channels
  • 0 to 20mA DC (0 to 20A AC with AC sensor) or ±10V DC input range
  • 4 alarm channels, open drain MOSFETS (1A DC loads, 0 to 35V DC)
  • 10 to 36V DC, 24V AC power
  • Modbus RTU high-speed RS-485

This signal conditioner is a four-channel analog input module with four discrete outputs. It provides isolation between input, output, power, and network circuits.

913MB, 914MB: DC Current/Voltage Modbus-RTU Input Module with Limit Alarms Description

This signal conditioner is a four-channel analog input module with four discrete outputs. It provides isolation between input, output, power, and network circuits.

Network communication adheres to the industry-standard RS-485 Modbus RTU protocol. AC and DC power sources are supported with non-polarized, diode-coupled terminals.

The inputs accommodate wide DC voltage or current ranges. Flexible discrete outputs operate as alarms or on/off controllers. As limit alarms, each discrete output can be configured with high and/or low set-points exclusively tied to an analog input channel. Alarm trips function without host communication enabling low-cost stand-alone alarms, as well as local backup for the primary control system. Otherwise, on/off control is based on commands issued by the host system.

Combining flexible transmitter functions, mixed signal I/O, alarm support, and a network interface in a single package, makes this instrument extremely powerful. Multi-channel design adds cost-efficiency and allows high-density mounting. Plus, safe, rugged construction makes these modules reliable for use in both control room and distributed field I/O applications. Custom module configurations are also possible (consult factory for details).

DC Current, DC Voltage or AC Current Input Limit Alarms or Discrete Outputs

Models
913MB: 4 current input channels.
914MB: 4 voltage input channels.

Input Ranges
0 to 20mA DC, ±10V DC, 0 to 20A AC (with 5020-350 sensor).

Output
Four output channels: Open-drain MOSFETs (1A DC loads) 0 to 35V DC.

Network Communication: Modbus-RTU high-speed RS-485.

Power Requirement: 10 to 36V DC, 24V AC.

Approvals
CE marked. UL, cUL listed Class I; Division 2; Groups A, B, C, D.

Performance Specifications

General Input

Resolution: 0.005% or 1 part in 20,000.

Noise Rejection
Normal mode: 40dB @ 60Hz, typical.
Common mode: 140dB @ 60Hz, typical.

Input Filter Bandwidth: -3dB at 3Hz, typical.

Input Conversion Rate: 180ms per channel.

Current Input (913MB)

DC Current Input Ranges: Range user-configured. Range selected applies to all channels.
0 to 1mA, 0 to 20mA, 4 to 20mA.
0 to 11.17mA (for use with 5020-350 AC sensor).

DC Current Input Resistance: 49.9 ohms.

DC Current Input Accuracy: ±0.1% of input range.

Voltage Input (914MB)

DC Voltage Input Ranges: Range user-configured. Range selected applies to all channels.
±10V, ±5V, ±2.5V, ±1.25V, ±625mV, ±313mV, ±156mV, ±78mV.

Input Impedance: 110.5K ohms.

DC Voltage Input Accuracy: ±0.1% of input range.

Discrete Output

Output Type: Four independent open drain MOSFET switches with a common return that operate as low-side switches.

Output Voltage Range: 0 to 35V DC. External voltage source required.

Output Current Range: 0 to 1A DC continuous for each output.

Output OFF Leakage Current: 50μA maximum.

Output ON Resistance: 0.15 ohms maximum.

Output Response Time: 4.1ms typical, from receipt of command to gate transition of the output MOSFET.

Operation: Digital outputs are set to their OFF state following a software or power-on reset. Outputs can optionally be set to user-defined states following a watchdog timeout. Watchdog timeout output control takes precedence over limit alarm control. Alarm control takes precedence over host control.

Communication

Supported Modbus Commands: The command/response protocol for communicating with this module adheres to the Modbus/RTU standard for the following Modbus functions:

  • Read Coil (Output) Status
  • Read Holding Registers
  • Read Input Registers
  • Force Single Coil (Output)
  • Preset Single Register
  • Force Multiple Coils (Output)
  • Preset Multiple Registers
  • Report Slave ID
  • Reset Slave

LED Indicators: LEDs indicate power, status, and discrete level/alarm.

Power and Isolation

Power Requirements: 10 to 36V DC or 22 to 26V AC.

Supply Current

Supply      Current Draw
10V DC     125mA maximum.
24V DC      50mA maximum.
24V AC    100mA rms maximum.

Isolation: 
1500V AC for 60 seconds or 250V AC continuous. 4-way isolation between input, network, power, and discrete I/O circuits. Inputs are isolated channel-to channel for common mode voltage to ±4V DC.

  • Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
  • 16-bit sigma-delta A/D yields 0.1% of range resolution and accuracy
  • Four inputs in a single inch-wide module reduces system costs and saves panel space
  • Four discrete outputs enable local limit alarms or host-controlled on/off switching
  • Heavy-duty 1A solid-state relays provide dependable on/off control of industrial devices
  • Self-calibration lowers maintenance costs by reducing periodic manual calibration checks
  • Watchdog timers provide a configurable fail-safe output state for use when host I/O communication is lost
  • Four-way isolation eliminates potential ground loops between power, input, output, and network circuitry
  • Self-diagnostics monitor micro-controller activity to detect operational failures (lock-up) and execute a reset to restore communication
  • Operating temperature: -25°C to 70°C (-13°F to 158°F).

 

 

 

What is EtherNet/IP? White Paper - 8500747 (Log in to view the file)
Introduction to EtherNet/IP What is EtherNet/IP (Ethernet Industrial Protocol)? EtherNet/IP is traditional Ethernet combined with an industrial application layer protocol targeted to industrial automation. This application layer protocol is the Control and Information Protocol (CIP™). In this whitepaper, you will review the basic aspects of EtherNet/IP and learn how the open-source protocol can benefit your...
Modbus/RS485 an Introduction White Paper - 8500648 (Log in to view the file)
Modbus/RS485 Network an Introduction White Paper This white paper describes the operation of Modbus as it relates to Acromag Series 900MB I/O modules.
How to Configure Kepware KEPServerEX 5.0 for Communications with Modbus I/O Modules - 8500880
Configuring Kepware KEPServerEX 5.0 for Communications with Acromag BusWorks Modbus I/O Modules Introduction This document provides example steps for configuring the Kepware KEPServerEX OPC Server for communications with Acromag Busworks Modbus RTU and Modbus TCP/IP Distributed I/O Modules. Once the server is configured, data may be read from or written to the I/O module using...
How to Configure LabVIEW to Communicate with Modbus I/O Modules Via an OPC Server - 8500881
Configuring LabVIEW 2009 to Communicate with Acromag BusWorks and EtherStax Modbus I/O Modules via an OPC Server Introduction National Instruments™ LabVIEW can be used to monitor and control Acromag BusWorks ® and EtherStax ® Modbus I/O modules via an OPC server. A separate application note, Configuring Kepware KEPServerEX® 5.0 for communications with Acromag BusWorks and EtherStax...

Manuals

913MB, 914MB 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)

900C-SIP: Modbus RTU Configuration Software Information Page (Log in to download the file)
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Additional information

Weight 16 oz
Dimensions 13 × 12 × 3 in
Part Number

913MB-0900: 4 current input channels, 914MB-0900: 4 voltage input channels

Configuration

Windows Software Configuration

Communication

Modbus-RTU, RS422/485

Product Series

BusWorks 900MB

  • Description

    913MB, 914MB: DC Current/Voltage Modbus-RTU Input Module with Limit Alarms Description

    This signal conditioner is a four-channel analog input module with four discrete outputs. It provides isolation between input, output, power, and network circuits.

    Network communication adheres to the industry-standard RS-485 Modbus RTU protocol. AC and DC power sources are supported with non-polarized, diode-coupled terminals.

    The inputs accommodate wide DC voltage or current ranges. Flexible discrete outputs operate as alarms or on/off controllers. As limit alarms, each discrete output can be configured with high and/or low set-points exclusively tied to an analog input channel. Alarm trips function without host communication enabling low-cost stand-alone alarms, as well as local backup for the primary control system. Otherwise, on/off control is based on commands issued by the host system.

    Combining flexible transmitter functions, mixed signal I/O, alarm support, and a network interface in a single package, makes this instrument extremely powerful. Multi-channel design adds cost-efficiency and allows high-density mounting. Plus, safe, rugged construction makes these modules reliable for use in both control room and distributed field I/O applications. Custom module configurations are also possible (consult factory for details).

    DC Current, DC Voltage or AC Current Input Limit Alarms or Discrete Outputs

    Models
    913MB: 4 current input channels.
    914MB: 4 voltage input channels.

    Input Ranges
    0 to 20mA DC, ±10V DC, 0 to 20A AC (with 5020-350 sensor).

    Output
    Four output channels: Open-drain MOSFETs (1A DC loads) 0 to 35V DC.

    Network Communication: Modbus-RTU high-speed RS-485.

    Power Requirement: 10 to 36V DC, 24V AC.

    Approvals
    CE marked. UL, cUL listed Class I; Division 2; Groups A, B, C, D.

    Performance Specifications

    General Input

    Resolution: 0.005% or 1 part in 20,000.

    Noise Rejection
    Normal mode: 40dB @ 60Hz, typical.
    Common mode: 140dB @ 60Hz, typical.

    Input Filter Bandwidth: -3dB at 3Hz, typical.

    Input Conversion Rate: 180ms per channel.

    Current Input (913MB)

    DC Current Input Ranges: Range user-configured. Range selected applies to all channels.
    0 to 1mA, 0 to 20mA, 4 to 20mA.
    0 to 11.17mA (for use with 5020-350 AC sensor).

    DC Current Input Resistance: 49.9 ohms.

    DC Current Input Accuracy: ±0.1% of input range.

    Voltage Input (914MB)

    DC Voltage Input Ranges: Range user-configured. Range selected applies to all channels.
    ±10V, ±5V, ±2.5V, ±1.25V, ±625mV, ±313mV, ±156mV, ±78mV.

    Input Impedance: 110.5K ohms.

    DC Voltage Input Accuracy: ±0.1% of input range.

    Discrete Output

    Output Type: Four independent open drain MOSFET switches with a common return that operate as low-side switches.

    Output Voltage Range: 0 to 35V DC. External voltage source required.

    Output Current Range: 0 to 1A DC continuous for each output.

    Output OFF Leakage Current: 50μA maximum.

    Output ON Resistance: 0.15 ohms maximum.

    Output Response Time: 4.1ms typical, from receipt of command to gate transition of the output MOSFET.

    Operation: Digital outputs are set to their OFF state following a software or power-on reset. Outputs can optionally be set to user-defined states following a watchdog timeout. Watchdog timeout output control takes precedence over limit alarm control. Alarm control takes precedence over host control.

    Communication

    Supported Modbus Commands: The command/response protocol for communicating with this module adheres to the Modbus/RTU standard for the following Modbus functions:

    • Read Coil (Output) Status
    • Read Holding Registers
    • Read Input Registers
    • Force Single Coil (Output)
    • Preset Single Register
    • Force Multiple Coils (Output)
    • Preset Multiple Registers
    • Report Slave ID
    • Reset Slave

    LED Indicators: LEDs indicate power, status, and discrete level/alarm.

    Power and Isolation

    Power Requirements: 10 to 36V DC or 22 to 26V AC.

    Supply Current

    Supply      Current Draw
    10V DC     125mA maximum.
    24V DC      50mA maximum.
    24V AC    100mA rms maximum.

    Isolation: 
    1500V AC for 60 seconds or 250V AC continuous. 4-way isolation between input, network, power, and discrete I/O circuits. Inputs are isolated channel-to channel for common mode voltage to ±4V DC.

  • Features & Benefits

    • Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
    • 16-bit sigma-delta A/D yields 0.1% of range resolution and accuracy
    • Four inputs in a single inch-wide module reduces system costs and saves panel space
    • Four discrete outputs enable local limit alarms or host-controlled on/off switching
    • Heavy-duty 1A solid-state relays provide dependable on/off control of industrial devices
    • Self-calibration lowers maintenance costs by reducing periodic manual calibration checks
    • Watchdog timers provide a configurable fail-safe output state for use when host I/O communication is lost
    • Four-way isolation eliminates potential ground loops between power, input, output, and network circuitry
    • Self-diagnostics monitor micro-controller activity to detect operational failures (lock-up) and execute a reset to restore communication
    • Operating temperature: -25°C to 70°C (-13°F to 158°F).

     

     

     

  • Tech Papers

    What is EtherNet/IP? White Paper - 8500747 (Log in to view the file)
    Introduction to EtherNet/IP What is EtherNet/IP (Ethernet Industrial Protocol)? EtherNet/IP is traditional Ethernet combined with an industrial application layer protocol targeted to industrial automation. This application layer protocol is the Control and Information Protocol (CIP™). In this whitepaper, you will review the basic aspects of EtherNet/IP and learn how the open-source protocol can benefit your...
    Modbus/RS485 an Introduction White Paper - 8500648 (Log in to view the file)
    Modbus/RS485 Network an Introduction White Paper This white paper describes the operation of Modbus as it relates to Acromag Series 900MB I/O modules.
    How to Configure Kepware KEPServerEX 5.0 for Communications with Modbus I/O Modules - 8500880
    Configuring Kepware KEPServerEX 5.0 for Communications with Acromag BusWorks Modbus I/O Modules Introduction This document provides example steps for configuring the Kepware KEPServerEX OPC Server for communications with Acromag Busworks Modbus RTU and Modbus TCP/IP Distributed I/O Modules. Once the server is configured, data may be read from or written to the I/O module using...
    How to Configure LabVIEW to Communicate with Modbus I/O Modules Via an OPC Server - 8500881
    Configuring LabVIEW 2009 to Communicate with Acromag BusWorks and EtherStax Modbus I/O Modules via an OPC Server Introduction National Instruments™ LabVIEW can be used to monitor and control Acromag BusWorks ® and EtherStax ® Modbus I/O modules via an OPC server. A separate application note, Configuring Kepware KEPServerEX® 5.0 for communications with Acromag BusWorks and EtherStax...
  • Specs & Data Sheets

    Manuals

    913MB, 914MB 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)

  • Software

    900C-SIP: Modbus RTU Configuration Software Information Page (Log in to download the file)
  • Accessories

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      • 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).
      Select options
    • Compare

      5034-202: RS-485 to 3-wire Cable Converter and Cable

      RS-485 to 3-wire cable converter and cable, DB-9M to 3 x 12AWG RS-485 cable, 8 ft.
      Select options
    • Compare

      5034-214: RS232 to RS485 Serial Port Converter

      Non-isolated RS232-to-RS485 serial port converter, RS232 port-powered, DB-9F to DB-9F.
      Select options
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      900C-SIP: Configuration Software Interface Package

      • Configuration Software
      • USB-to-RS232 Adapter
      • RS232-to-RS485 Adapter
      • Interface Cable
       
      Select options
  • Additional information

    Additional information

    Weight 16 oz
    Dimensions 13 × 12 × 3 in
    Part Number

    913MB-0900: 4 current input channels, 914MB-0900: 4 voltage input channels

    Configuration

    Windows Software Configuration

    Communication

    Modbus-RTU, RS422/485

    Product Series

    BusWorks 900MB