Modular-I2CRJ45
by Austins Creations
I2C compatible board that handles multiple inputs via an RJ45 connection
Designed to be assembled in a modular format so multiple boards can easily fit next to each other
Features
- Comes with 8 port
- Expandable up to 32 ports
- Firmware supports multiple types of switches, contacts, encoders
- 12-24v DIY POE on the RJ45 connections for switches with basic LEDs
- 4 inputs per port
- Per port power switching via external DIP switches
- Each port has a 150mA poly fuse
- Will fit side by side in the same space as a normal I2CRJ45 board from SuperHouse
Using the product
Using your modular I2CRJ45 board is a fairly strightforward process. Each board has a set of screw terminals. These are for your 12-24v power input (12v is the recommended option). There are two terminals to allow for easy daisy chaining between other boards. The board Doesn't use power input on the IDC connector, only VCC (logic voltage; commonly 3.3v with the rack32 / oxrs black)
Don't hot swap your I2C cable
The 2*3 pin 2.54mm IDC cable isn't recommended to be removed or added when the system is powered. Always turn off power before changing things.
There are a total of 3 DIP switches built into the Board. The 2-way DIP switch on the right top is labeled lengthwise along itself I2C P/U: this is for your I2C pullup resistors. The device that is the furthest away from the main rack controller should have this enabled, ie: both switches turned on.
The other two DIP switches are 4-way. The lowest switch (closest to the 8 port RJ45) is the RST which connects the MCP (the one to the right of each DIP switch) to the main controller RST line. These should be on, but can be turned off when trying to solve debug problems.
The other three positions on those 4-way DIP switches are for setting the MCP address. Up to 8 MCPs can be on an I2C bus but they each need their own address. Position 0 starts at the top of the PCB.
| Position | 0X20 | 0X21 | 0X22 | 0X23 | 0X24 | 0X25 | 0X26 | 0X27 |
|---|---|---|---|---|---|---|---|---|
| 0 | off | on | off | on | off | on | off | on |
| 1 | off | off | on | on | off | off | on | on |
| 2 | off | off | off | off | on | on | on | on |
The ports are numbered:
| Top | 1 | 3 | 5 | 7 | |
| Bottom | 2 | 4 | 6 | 8 |
From looking at the ports in front of an assembly like it would be installed in a rack case.
Each Port has 8 pins they breakout as follows:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
|---|---|---|---|---|---|---|---|
| Input 1 | Input 2 | Input 3 | VDD | VDD | Input 4 | GND | GND |
VDD is your system voltage; AKA the power being feed by the Screw Terminals (12-24v)
Supported Firmware
- OXRS-SHA-StateController-ESP32-FW Github
- OXRS-SHA-StateMonitor-ESP32-FW Github
- OXRS-IO-SecurityMonitor-ESP32-FW Github
Additional Resources
- More info Github
Where to Buy
- Contact on Discord or WEBSITE