VAV Controller—Variable Air Volume (VAV) Controller 23
The I/O wiring and N2 Bus must be clean, without electrical noise
transients from nearby lightning, heavy equipment switching, or inductive
loads being driven.
For the N2 Bus, the Transient Eliminator, model TE/JC04C12, made by
Advanced Protection Technologies (APT) is recommended. Refer to the
Metasys Network Technical Manual (FAN 636), the N2 Communications
Bus Technical Bulletin (LIT-636018) for more information.
I/O and
Communication
Lines Wiring
Transient Noise
Precautions