Concept
RP-IO BACnet MS/TP Support
The RP-IO modules are designed for connection to a BACnet MS/TP (RS-485) network and can only communicate with automation servers using the BACnet MS/TP protocol.
The RP-IO modules have an RS-485 port with a 3-pole removable screw terminal block that is used for connection to the BACnet MS/TP (RS-485) network and MS/TP communication with the automation server (AS-P or AS-B). Connecting to an IP network is not supported as the RP-IO modules do not have Ethernet ports. For more information, see RP-IO Module Communication Port .
You need to configure a unique MS/TP address for the device during installation using the address DIP switches on the device. For more information, see MS/TP DIP Switches .
As part of the commissioning process for the device, you also need to configure the baud rate for the automation server BACnet MS/TP (RS-485) bus. For more information, see MS/TP Communications Baud Rate .
The RP-IO modules can be mixed with b3 BACnet devices on the BACnet MS/TP (RS-485) network. For more information, see RS-485 Communications .
The RP-IO modules are not isolated and connection of the I/O modules to a network comprised of isolated RS-485 interfaces is not recommended. The RS-485 application guidelines provide additional details. For more information, see RS-485 Communications .
A mix of up to 50 devices per RS-485 Com port can be connected to an automation server.
Hardware Overview
RP-IO Modules
RP-IO Models
RS-485 Communications
Wiring
RP-IO Module Communication Port
MS/TP Communications Baud Rate
Configuring MS/TP Network Settings
MS/TP DIP Switches
Configuring the MS/TP Address