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

These modules drive four analog output channels and also feature four discrete outputs for on/off control. Isolation separates the output, power, and network circuits. Network communication adheres to the industry-standard RS-485 Modbus RTU protocol.

917MB, 918MB: DC Current/Voltage Modbus-RTU Output Modules with Discrete Outputs Description

These modules drive four analog output channels and also feature four discrete outputs for on/off control. Isolation separates the 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 analog outputs generate a signal based on communication from the host. They accommodate wide DC voltage or current ranges.

Discrete outputs provide simple on/off switching capability for external devices.

Combining analog outputs, on/off controllers, 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 make it reliable for both control room and distributed field I/O use in a broad range of temperature control applications.

Custom module configurations are also possible (consult factory for details).

Learn about the 900MB Series and view all models >

917MB, 918MB: DC Current/Voltage Modbus-RTU Output Modules with Discrete Outputs Features & Benefits

  • Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
  • 12-bit D/A yields 0.1% of span resolution and accuracy
  • Four outputs in a single inch-wide module reduces system costs and saves panel space
  • Four discrete outputs enable 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 failsafe output state for use when host I/O communication is lost
  • Three-way isolation eliminates potential ground loops between power, output and network circuitry
  • Self-diagnostics monitor microcontroller activity to detect operational failures (lock-up) and execute a reset to restore communication
  • Operating temperature: -25°C to 60°C (-13°F to 140°F), limit 917MB ambient to 50°C maximum for supply voltages less than 15V

Learn about the 900MB Series and view all models >

What is Modbus/RS485? An Introduction - 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.   Learn more: What is Ethernet/IP?
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

917MB, 918MB 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)

IntelliPack & Series 900MB Configuration Software Windows 7 or 8 User Manual (Log in to download the file)

IntelliPack & Series 900 Configuration Software: Windows 10 User Manual (Log in to download the file)

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

    900C-SIP: Configuration Software Interface Package

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

Additional information

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

917MB-0900: DC Current Output Module, 918MB-0900: DC Voltage Output Module

Configuration

Windows Software Configuration

Communication

Modbus-RTU, RS422/485

Product Series

BusWorks 900MB

  • Description

    917MB, 918MB: DC Current/Voltage Modbus-RTU Output Modules with Discrete Outputs Description

    These modules drive four analog output channels and also feature four discrete outputs for on/off control. Isolation separates the 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 analog outputs generate a signal based on communication from the host. They accommodate wide DC voltage or current ranges.

    Discrete outputs provide simple on/off switching capability for external devices.

    Combining analog outputs, on/off controllers, 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 make it reliable for both control room and distributed field I/O use in a broad range of temperature control applications.

    Custom module configurations are also possible (consult factory for details).

    Learn about the 900MB Series and view all models >

    917MB, 918MB: DC Current/Voltage Modbus-RTU Output Modules with Discrete Outputs Features & Benefits

    • Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
    • 12-bit D/A yields 0.1% of span resolution and accuracy
    • Four outputs in a single inch-wide module reduces system costs and saves panel space
    • Four discrete outputs enable 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 failsafe output state for use when host I/O communication is lost
    • Three-way isolation eliminates potential ground loops between power, output and network circuitry
    • Self-diagnostics monitor microcontroller activity to detect operational failures (lock-up) and execute a reset to restore communication
    • Operating temperature: -25°C to 60°C (-13°F to 140°F), limit 917MB ambient to 50°C maximum for supply voltages less than 15V

    Learn about the 900MB Series and view all models >

  • Tech Papers

    What is Modbus/RS485? An Introduction - 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.   Learn more: What is Ethernet/IP?
    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

    917MB, 918MB 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)

    IntelliPack & Series 900MB Configuration Software Windows 7 or 8 User Manual (Log in to download the file)

    IntelliPack & Series 900 Configuration Software: Windows 10 User Manual (Log in to download the file)

  • Software

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

    • 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
    • Compare

      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

    917MB-0900: DC Current Output Module, 918MB-0900: DC Voltage Output Module

    Configuration

    Windows Software Configuration

    Communication

    Modbus-RTU, RS422/485

    Product Series

    BusWorks 900MB