🌐 ASHRAE 135 BACnet MS/TP RS-485 (9600 to 76800 Baud, Max 32-64 Nodes / Segment)

BACnet MS/TP Baud Rate & Token Ring Calculator

Size commercial Building Automation System (BAS) field controller networks under ANSI/ASHRAE Standard 135: calculate RS-485 daisy-chain token passing latency (milliseconds for token circulation across 32 to 64 VAV/FCU controllers at 38,400 or 76,800 baud), select 120-ohm end-of-line (EOL) termination resistors, and BAS engineering margins.

1. Project & Operating Inputs

BACnet MS/TP Field Controllers (Node Count e.g. 48 VAV Controllers)

Network Baud Rate (Baud e.g. 38,400 Baud Standard Rate)

Customer Bid Price for Supplied, Wired & Mapped DDC Network ($)

DDC Controllers, Low-Capacitance Shielded 24 AWG Wire, EOLs & Tech ($)

2. Financial Breakdown & Yield

ASHRAE 135 BACNET MS/TP

Turnkey BAS Controls Contract Profit

Building Automation Integrator Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost