Andover Controls CONTINUUM NetController - Infinet (RS-485)

20 Andover Controls
Infinet (RS-485)
The NetController can be connected to other Andover Controls devices such as local
VAV controllers and display modules. These connections are accomplished using
any of the three Infinet RS-485 ports.
COMM 1, COMM 2 and COMM 4 include Infinet connections. A removable screw
terminal type connector is provided for the interconnection.
The
Infinet is a high-performance, token-passing local area network (LAN) designed
for Andover Controls
Infinet controllers where more than one controller can be the
network master at a time. It is the interface that all earlier models of the Andover
product line communicate through.
Infinet is physically wired using two conductor shielded twisted pair cable that
transmits data a rate of up to 19.2 KB/sec. Although
Infinet has a token-passing data
access system, it can have a combination of daisy-chained bus and star topology.
Cable lengths of up to 4,000-ft (1,219.2-m) daisy chained from
Infinet controller to
Infinet controller for every 31 Infinet controllers on one arm of a star are supported.
After 31 nodes or 4,000 ft (1,219.2 m) an
InfiLink 200 or InfiLink 210 signal repeater
is required to add more nodes to the network or further extend the cabling. Using an
InfiLink 210 allows you to extend the length of Infinet with fiber optic cable,
recommended for running cable between buildings and through noisy environments.
You can have a maximum of 127 nodes on one
Infinet with InfiLink 200 or 210 .
For more detailed information on the Infinet network, consult the
Andover Controls
Infinet Network Configuration Guide
, document number 30-3001-169.
Infinet Cable Specifications
Cables used to form the
Infinet should be 24-gauge, single-twisted-pair, tinned,
shielded copper wire. The cable should have nominal impedance of 100
Ω
and a
nominal velocity of propagation of 78%. Capacitance of
Infinet cable should be below
12.5 pF/ft between conductors and below 22 pF/ft between the conductor connected
to ground and the next conductor.
Recommended: Twisted pair Brand Rex H 9002
Twisted Pair Plenum Anixter 9J2401021