This guide provides step‑by‑step instructions for installing the EBTRON EF‑N1000‑T ELF airflow and temperature measurement station with BACnet/Modbus output.
The EBTRON EF‑N1000‑T ELF (Electronic Low Flow) is a compact airflow and temperature measurement station designed for small ducts and VAV terminal box applications. It offers non‑isolated RS‑485 BACnet MS/TP or Modbus RTU output and operates in temperatures from -20°F to 120°F.
The document walks the installer through site preparation, probe mounting, 24 VAC power and RS‑485 wiring, DIP‑switch configuration for MAC address, baud rate, and network termination, as well as final start‑up checks and how to restore factory defaults.
| Power input voltage | 22.8 to 26.4 VAC |
|---|---|
| Power consumption | 5 VA |
| Operating temperature range | -20°F to 120°F |
| Network output | RS‑485 BACnet MS/TP or Modbus RTU |
The factory default is 76,800 bps, but it can be changed locally to 38,400, 19,200, or 9,600 bps using DIP switches 1‑4 on S1.
All devices must be connected in a daisy‑chain configuration; T‑connections and stubs are not permitted.