PiBridge is a backplane bus by which all the modules belonging to the Revolution Pi family can be connected.
The following add-ons can be connected to your RevPi Core using PiBridge:
- Up to 10 expansion modules (e.g. our I/O modules). Of these 10 Extension modules, 2 may be RevPi Gates modules.
PLEASE NOTE
RevPi Gate modules may only be positioned at the end of a chain, therefore to the far left or to the far right. It you place them in the middle of the chain, module recognition will not function properly and the system will not start up after being turned on but go into error status. The PiCtory configuration programme will also not allow such alignments.
The data is transmitted by signal lines from one module via the PiBridge to the other module.
The various signal lines have the following tasks:
| Pin | Abbreviation | Description | Function |
| Position recognition | These signal lines control the initial module and position recognition. RevPi Core thereby recognises on which side a module is connected. |
||
| A1 | SNIFF1a | Left select | |
| B1 | SNIFF1b | Right select | |
| A2 | SNIFF2a | Left Side acknowledge | |
| B2 | SNIFF2b | Right Side acknowledge | |
| Data Ground | |||
| A3 | GND | Common Ground | Data Ground (common use with PIN B3). |
| B3 | GND | Common Ground | Data Ground (common use with PIN A3). |
| Ethernet channels | These signal lines manage RevPi Gate data traffic | ||
| A4 | LRX- | Left receive Data negative | Received data that is sent from the device on the left (data wire A). |
| B4 | RTX- | Right transmit Data negative | Transmission data that is sent to the device on the right (data wire A). |
| A5 | LRX+ | Left receive Data positive | Received data that is sent from the device on the left (data wire B). |
| B5 | RTX+ | Right transmit Data positive | Transmission data that is sent to the device on the right (data wire B). |
| A6 | LTX- | Left transmit Data negative | Transmission data that is sent to the device on the left (data wire A). |
| B6 | RRX- | Right receive Data negative | Received data that is sent from the device on the right (data wire A). |
| A7 | LTX+ | Left transmit Data positive | Transmission data that is sent to the device on the left (data wire B). |
| B7 | RRX+ | Right receive Data positive | Received data that is sent from the device on the right (data wire B). |
| Data Ground | |||
| A8 | GND | Common Ground | Data Ground (common use with PIN B8). |
| B8 | GND | Common Ground | Data Ground (common use with PIN A8). |
| RS485 channels | These signal lines serve the exchange of status and configuration data and the I/O module data exchange. | ||
| A9 | RS485+ | RS485 positive | |
| B9 | RS485+ | RS485 positive | |
| A10 | RS485- | RS485 negative | |
| B10 | RS485- | RS485 negative | |