10
CNT-SVX07D-EN
General wiring information
This chapter provides specifications and general information about wiring the Tracer ZN521 zone
controller. The controller requires wiring for:
•
Input/output terminals
•
AC power to the controller
•
Communication-link wiring, if the controller is to communicate with a building automation
system (BAS)
Input/output terminal wiring
All input/output terminal wiring for the Tracer ZN521 zone controller is application specific and
dependant on the configuration of the controller. Input/output terminal wiring must meet the
following requirements:
•
All wiring must comply with the National Electrical Code and local codes.
•
Use only 18 AWG, twisted-pair wire with stranded, tinned-copper conductors. (Shielded wire
is recommended.)
•
Binary input and output wiring must not exceed 1000 ft (300 m).
•
Analog input wiring must not exceed 300 ft (100 m).
•
Do not run input/output wires in the same wire bundle with any ac power wires.
For application-specific wiring information and diagrams, see
“Input/output functions and wiring
for typical applications,” p. 13
AC power wiring
WARNING
Hazardous Voltage!
Before making line voltage electrical connections, lock open the supply-power disconnect
switch. Failure to do so may cause death or serious injury.
CAUTION
Proper Grounding Required!
Make sure that the 24 Vac transformer is properly grounded. Failure to do so may result in
personal injury or equipment damage.
Notice:
Avoid damage to the controller!
Complete input/output wiring before applying power to the Tracer ZN521 zone controller.
Failure to do so may cause damage to the controller or power transformer due to inadvertent
connections to power circuits.
Important:
Do not share 24 Vac between controllers.
All wiring must comply with National Electrical Code and local codes.
The ac power connections are in the top left corner of the Tracer ZN521 zone controller (see
Figure 3
).
Summary of Contents for Tracer ZN521
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