Table of Contents
Advertisement
Wired Controllers—Communication Wiring
Wiring Installation (Tracer ZN520)
Tracer ZN520 controllers are LonTalk
interface with the Trane Tracer Summit building
management system. Reference the unit wiring diagram
or submittals.
Ground shields at each Tracer ZN520, taping the opposite
end of each shield to prevent any connection between the
shield and anther ground. Refer to the most recent version
of Trane publication CNT-SVX04A-EN (Tracer ZN520 Unit
Controller: Installation, Operation and Programming
Guide) for the communication wiring diagram.
Communication wire must conform to the following
specification:
1. Shielded twisted pair 18 AWG
2. Capacitance 23 (21–25) picofarads (pF) per foot
3. Listing/Rating—300 V 150C NEC 725-2 (b) Class 2 Type
CL2P
4. Trane Part No. 400-20-28 or equivalent, available
through Trane BAS Buying Group Accessories catalog.
Note: Communication link wiring is a shielded, twisted
pair of wire and must comply with applicable
electrical codes.
Follow these general guidelines when installing
communication wiring on units with a Tracer ZN520
controller:
•
Maintain a maximum 5000 ft. aggregate run.
•
Install all communication wiring in accordance with
the NEC and all local codes.
•
Solder the conductors and insulate (tape) the joint
sufficiently when splicing communication wire. Do not
use wire nuts to make the splice.
•
Do not pass communication wiring between buildings
because the unit will assume different ground
potentials.
•
Do not run power in the same conduit or wire bundle
with communication link wiring.
Note: You do not need to observe polarity for LonTalk
communication links.
Device Addressing
LonTalk devices are given a unique address by the
manufacturer. This address is called a Neuron ID. Each
Tracer ZN520 controller can be identified by its unique
Neuron ID, which is printed on a label on the controller's
logic board. The Neuron ID is also displayed when
communication is established using Tracer Summit or
Rover service tool. The Neuron ID format is
00-01-64-1C-2B-00.
UV-SVN02C-EN
®
devices that
Wire Characteristics
Controller communication-link wiring must be low
capacitance, 18-gage, shielded, twisted pair with stranded,
tinned-copper conductors. For daisy chain configurations,
limit the wire run length to 5,000 ft. Truck and branch
configurations are significantly shorter. LonTalk wire
length limitations can be extended through the use of a
link repeater.
Recommended Communication Wiring
Practices
The following guidelines should be followed while
installing communication wire.
•
LonTalk is not polarity sensitive. Trane recommends
that the installer keep polarity consistent throughout
the site.
•
Only strip away two inches maximum of the outer
conductor of shielded cable.
•
Make sure that the 24 Vac power supplies are
consistent in how they are grounded. Avoid sharing
24 Vac between LonTalk UCMs.
•
Avoid over-tightening cable ties and other forms of
cable wraps. A tight tie or wrap could damage the
wires inside the cable.
•
Do not run LonTalk cable alongside or in the same
conduit as 24 Vac power.
•
In an open plenum, avoid lighting ballasts, especially
those using 277 Vac.
•
Do not use a trunk and branch configuration, if
possible. Trunk and branch configurations shorten the
distance cable can be run.
Wiring Installation (Tracer UC400)
This section provides information about wiring the UC400
controller. For more detailed information, refer to BAS-
SVX02D-EN (Installation, Operation, and Maintenance:
Tracer UC400 Programmable Controller), or the most
recent revision.
65
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
