901MB, 902MB, 903MB: Multi-Channel Modbus-RTU Discrete I/O Modules
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Product short description:
- Active-Low Inputs, Sinking Outputs (Low-Side Switching)
- 12 input and/or 12 output channels
- 0 to 35V DC I/O range
- 10 to 36V DC, 24V AC power
- Modbus-RTU high-speed RS-485
These modules provide twelve discrete input and/or output channels. Isolation separates the I/O, power, and network circuits. Network communication adheres to the industry-standard RS-485 Modbus-RTU protocol.
901MB, 902MB, 903MB: Multi-Channel Modbus-RTU Discrete I/O Modules Description
These modules provide twelve discrete input and/or output channels. Isolation separates the I/O, power, and network circuits. Network communication adheres to the industry-standard RS-485 Modbus-RTU protocol.
Both AC and DC power sources are supported with wide range, non-polarized, diode-coupled terminals.
The open-drain outputs are intended for current-sinking or low-side switching applications. The buffered inputs are active-low. These models are the complement of the 904, 905, and 906 units which have open-source, high-side output switches and active-high inputs.
Socketed pull-up resistors are easily removed or exchanged to satisfy your application requirements.
The 903MB model has twelve input/output points that may be used as inputs or outputs on a bit-by-bit basis. Outputs may be read back to verify output settings.
Combining flexible I/O types, wide I/O ranges, 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).
Learn about the 900MB Series and view all models >
901MB, 902MB, 903MB: Multi-Channel Modbus-RTU Discrete I/O Modules Features & Benefits
- Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
- Twelve I/O channels in a single inch-wide unit reduces system costs and saves panel space
- High-voltage, high-current, open-drain outputs enable direct (low-side) control of external devices
- High-voltage buffered inputs monitor discrete levels from a variety of industrial devices
- Tandem input/output circuitry (903 models only) connects input buffers with open-drain outputs for convenient loop-back monitoring of the output state
- Outputs have built-in over-temperature and over-current shut-down protection, plus active clamping circuits for switching inductive loads
- Watchdog timers provide a configurable fail-safe output state for use when host I/O communication is lost
- Three-way isolation eliminates potential ground loops between power, I/O, 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)
Manuals
901MB, 902MB, 903MB 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 900 Configuration Software: Windows 10 User Manual (Log in to download the file)
IntelliPack & Series 900MB Configuration Software Windows 7 or 8 User Manual (Log in to download the file)
Brochures
-
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. -
5034-214: RS232 to RS485 Serial Port Converter
Non-isolated RS232-to-RS485 serial port converter, RS232 port-powered, DB-9F to DB-9F. -
900C-SIP: Configuration Software Interface Package
- Configuration Software
- USB-to-RS232 Adapter
- RS232-to-RS485 Adapter
- Interface Cable
Additional information
Weight | 10 oz |
---|---|
Dimensions | 4.5 × 1.5 × 5 in |
Part Number | 901MB-0900: 12 input channels, 902MB-0900: 12 output channels, 903MB-0900: 12 input & 12 output channels |
Configuration | Windows Software Configuration |
Communication | Modbus-RTU, RS422/485 |
Product Series | BusWorks 900MB |
-
Description
901MB, 902MB, 903MB: Multi-Channel Modbus-RTU Discrete I/O Modules Description
These modules provide twelve discrete input and/or output channels. Isolation separates the I/O, power, and network circuits. Network communication adheres to the industry-standard RS-485 Modbus-RTU protocol.
Both AC and DC power sources are supported with wide range, non-polarized, diode-coupled terminals.
The open-drain outputs are intended for current-sinking or low-side switching applications. The buffered inputs are active-low. These models are the complement of the 904, 905, and 906 units which have open-source, high-side output switches and active-high inputs.
Socketed pull-up resistors are easily removed or exchanged to satisfy your application requirements.
The 903MB model has twelve input/output points that may be used as inputs or outputs on a bit-by-bit basis. Outputs may be read back to verify output settings.
Combining flexible I/O types, wide I/O ranges, 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).
Learn about the 900MB Series and view all models >
901MB, 902MB, 903MB: Multi-Channel Modbus-RTU Discrete I/O Modules Features & Benefits
- Standard Modbus RTU protocol with high-speed RS-485 communication (up to 115K bps)
- Twelve I/O channels in a single inch-wide unit reduces system costs and saves panel space
- High-voltage, high-current, open-drain outputs enable direct (low-side) control of external devices
- High-voltage buffered inputs monitor discrete levels from a variety of industrial devices
- Tandem input/output circuitry (903 models only) connects input buffers with open-drain outputs for convenient loop-back monitoring of the output state
- Outputs have built-in over-temperature and over-current shut-down protection, plus active clamping circuits for switching inductive loads
- Watchdog timers provide a configurable fail-safe output state for use when host I/O communication is lost
- Three-way isolation eliminates potential ground loops between power, I/O, 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 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 - 8500880Configuring 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 - 8500881Configuring 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
901MB, 902MB, 903MB 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 900 Configuration Software: Windows 10 User Manual (Log in to download the file)
IntelliPack & Series 900MB Configuration Software Windows 7 or 8 User Manual (Log in to download the file)
Brochures
-
Software
900C-SIP: Modbus RTU Configuration Software Information Page (Log in to download the file) -
Accessories
-
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. -
5034-214: RS232 to RS485 Serial Port Converter
Non-isolated RS232-to-RS485 serial port converter, RS232 port-powered, DB-9F to DB-9F. -
900C-SIP: Configuration Software Interface Package
- Configuration Software
- USB-to-RS232 Adapter
- RS232-to-RS485 Adapter
- Interface Cable
-
-
Additional information
Additional information
Weight 10 oz Dimensions 4.5 × 1.5 × 5 in Part Number 901MB-0900: 12 input channels, 902MB-0900: 12 output channels, 903MB-0900: 12 input & 12 output channels
Configuration Windows Software Configuration
Communication Modbus-RTU, RS422/485
Product Series BusWorks 900MB
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