Connect BACnet/IP Servers to a Modbus RTU Master

Easily connect up to 32 BACnet/IP Servers to a Modbus RTU Master





Product Description

Connect BACnet/IP Servers to a Modbus RTU Master
The 460MRSBC moves data between a Modbus RTU Master device and up to 32 BACnet/IP Server devices. The 460MRSBC module bundles your BACnet/IP data and makes it available as Modbus RTU data. The module provides complete Modbus RTU Slave and BACnet/IP Client capability.

How Do I Use the 460MRSBC in My Application?
To your Modbus RTU Master device the gateway acts as a Modbus RTU Slave. To your BACnet/IP Server devices the gateway acts as a BACnet/IP Client.

You can both send data to your BACnet/IP Server devices and read current status data. Data is mapped between a BACnet/IP device and Modbus RTU using BACnet/IP properties. Up to 1200 analog and 1600 binary objects can be mapped into or out of up to 512 contiguous registers and coils in the Modbus RTU Master.

It’s really that simple.

Why Use Real Time Automation as a Gateway Supplier?
The 460MRSBC provides an option to access BACnet/IP data on a Modbus RTU network. While there are certainly a number of other companies offering stand alone gateways, there is no one who provides the level of support and service that you receive from RTA.

When you call, a live person answers the phone. When you talk with sales, you will get honest answers and recommendations even if that means recommending someone else’s solution. When you get support, it is from an engineer who had a hand in the product’s development, and support doesn’t require a ticket or 24 hour wait. We are unashamed of the fact that we are a smaller company because that means you mean a lot more to us. Try the RTA difference today!

  • Manual
  • 3’ power cable with Flying leads
  • 5 Year Hardware Warranty
  • IPSetup software — Automatically locates RTA Gateway on the network
  • Unlimited Firmware Feature Upgrades for Life
  • CAT5 Cross over cable for direct connection to PC during programming
  • Complete, Unlimited Access to our Industry Leading Support Staff

Modbus RTU Slave Features

Modbus Operation Modes
Modbus RTU Slave

Function Codes Supported
1,2,3,4,5,6, 7,15 & 16

Byte and Word Swapping

Maximum Modbus RTU Master Connections

Contiguous Data Areas
200 Total - 100 reads & 100 writes

Data Area Limits
500 Contiguous Coils or 500 Contiguous Registers

BACnet/IP Client Features

BACnet/IP Operation Modes
BACnet/IP Client

Supported Object Types
Device, BI/BO/BV, AI/AO/AV, MI/MO/MV, Character String Value

Supported Service Codes
Read Property-A, Read Property Multiple-A, Write Property-A, Write Property Multiple-A, Device Dynamic Binding-A

Maximum Connections

Number Read/Write Scan Lines per Device
200 Total - 100 reads and 100 writes

Scan Line Support
Up to 128 Objects

Gateway Security

You can configure up to 9 different users access to diagnostic and configuration screens.


Set <, <=, >=, >, ==, !=, and Change-of-State rules on any data moving through the gateway. If alarm rule is triggered an email notification can be sent.

Translation Table

Allows for data manipulation during protocol translation. Scaling and other data format changes can occur in the gateway.

Status and Counters

Protocol specific status, counters and error messages are accessible within the gateways diagnostics page. They can also be delivered to a connected device.

Diagnostic Logging Page

Allows users to see and log start up sequences, protocol specific messages & error messages.


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