How to Connect I/O Modules and RevPi Gates

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 Connect using PiBridge:

  • Up to 5 expansion modules (e.g. our I/O modules). Of these 5 expansion modules, 1 module may be a RevPi Gate.
PLEASE NOTE
RevPi I/O modules and RevPi Gates may only be connected on the left side with the black PiBridge connector. If you connect the modules on the right side (the Connect connector), your devices can be destroyed.
PLEASE NOTE
RevPi Gate modules may only be positioned at the end of a chain, therefore to the far left. If you place it 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.

  • Insert PiBridge, as shown, on the PiBridge connector of the devices you would like to connect.

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 Connect 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 recieve 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 recieve 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 recieve 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 recieve 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