The BRX Do-More PLC has its own line of remote input and output expansion units. You can add up to 8 I/O expansion units per controller (CPU) and 8 BRX expansion modules per expansion unit. This will make your system grow with your needs.
The remote I/O expansion units feature the following:
• All units have built-in Ethernet port, 10/100 Mbps
• MBIO units have onboard RS-485 port with removable 3-Pin connector
• Support for 8 expansion modules
• AC and DC powered units available
• AC powered units include an integral 24VDC auxiliary output power supply
• Power connector and serial port connector included
We will be looking at the BX-DMIO-M. This is the Do-More Ethernet Remote I/O supported protocol unit. We will discuss the hardware and then connect and configure the unit to work with our existing BRX Do-more PLC. Let's get started.

More information can be obtained on our website. This includes all of the links mentioned in this video.
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BRX Do-More PLC Ethernet Remote IO Controller BX-DMIO
Hardware Video
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Configuration and Programming Video
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The entire BRX Series PLC can be found at the following location:
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Here are the individual posts with video links:
Installing the Software
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Establishing Communication
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Numbering Systems and Addressing
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First Program
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Monitoring and Testing the Program
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Online Editing and Debug Mode
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Timers
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Counters
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Program Control
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Shifting Instructions
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Drum Instruction
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Data Logging
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Email – Text SMS Messaging Gmail
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Secure Email Communication
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AdvancedHMI Communication – Modbus TCP
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Analog IO – System Configuration
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PID with PWM Output
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PID Ramp Soak Profile
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BRX Do-More Simulator MQTT Publish-Subscribe
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BRX Do-More PLC MQTT Communications
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BRX Do-More PLC to Stride Field IO Modbus TCP
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There are several reasons why we are using the BRX Series Controller. Here are just a few.
- Standalone PLC with built-in I/O
- Built-in Data Logging
- Communication ability - Ethernet Port, RS232, RS485, USB - support for protocols such as Modbus RTU, Modbus TCP, ASCII, K-sequence (DirectLOGIC users), Custom Protocols (ASCII over serial, TCP or UDP over Ethernet)
- Built-in Analog input and output
- Integrated motion control
- High-speed counters
- Powerful instruction set (Video of Instructions in software)
- Ability to expand the system with a variety of modules
- Part of the Do-More series of PLCs which use the same free software. (Do-More Designer)
- Integrated simulator in the software capable of external communications for testing

The BRX series of programmable logic controllers consist of four different units. They differ depending on the Inputs and Outputs built into the unit and if it has the ethernet port.
No I/O Micro PLC unit – (BX ME)
10 Point Micro PLC unit – (BX 10/10E)
18 Point Micro PLC unit - (BX 18/18E)
36 Point Micro PLC unit - (BX 36/36E)
These CPUs (Central Processing Units) are also known as MPU (Multi-Processing Units) because of the communication capabilities.

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