Tbus Infosheet

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Frequently Asked Questions

• What are the two types of buses in a computer?

  Types of computer buses A bus is either a parallel or serial bus, and either an internal bus (local bus) or an external bus (expansion bus). Internal bus vs. external bus An internal bus enables the communication between internal components, such as a video card and memory.

• How many bits are in a bus?

  Each wire in the bus carries a bit (s) of information, which means the more wires a bus has, the more information it can address. For example, a computer with a 32-bit address bus can address 4 GB of memory, and a computer with a 36-bit bus can address 64 GB of memory.

• What is the T-bus protocol?

  The T-bus protocol is a protocol that can be used flexibly by omitting specified conditions and offers the user flexibility in the execution, thus guaranteeing optimal use.

• How does a computer bus transmit data?

  A computer bus can transmit its data using either a parallel or serial method of communication. With a parallel bus, data is transmitted several bits at a time. However, with a serial bus, the data is transferred one bit at a time.

• What is the bus supervisor on the remote field bus?

  On the Remote Field Bus, the bus supervisor is the BACnet IP to BACnet MS/TP Router (hereafter called the BACnet Router), which works with the supervisory engine when a Remote Field Bus is installed. MS/TP Communications Bus Technical Bulletin 5

• What happens if an SA Bus does not have a bus supervisor?

  If an SA bus, FC bus, or Remote Field Bus does not have a bus supervisor, the master device with the lowest device address value on the bus and a specific baud rate selected starts the communication.

• What is the difference between local FC bus and SA Bus?

  On a local FC bus, the bus supervisor is the supervisory engine. On the local SA bus, the bus supervisor is a field controller. On the Remote Field Bus, the bus supervisor is the BACnet IP to BACnet MS/TP Router (hereafter called the BACnet Router), which works with the supervisory engine when a Remote Field Bus is installed.

• What is the remote field bus on a BACnet router?

  With the addition of a BACnet IP to BACnet MS/TP Router, the Remote Field Bus allows connection to remote equipment controllers over IP. This document is intended for the user who needs to know the rules, requirements, limits, specifications, and configuration of the MS/TP bus to design, wire, or troubleshoot an MS/TP application.