Terminal Wiring Guidelines, Functions, Ratings, And Requirements; Input And Output Wiring Guidelines - Johnson Controls F4-CV Series Installation Manual

Table 4: Supply power terminal block wiring
Description
1 Supply power terminal block
2 Supply power terminal header
3 Wires from Johnson Controls 24 VAC, class 2 power
transformer
4 COM (Brown wire)
5 24 VAC (Orange wire)
Note: The supply power wire colors may be different
on transformers from other manufacturers. Refer to
the transformer manufacturer's instructions and the
project installation drawings for wiring details.
Important: Connect 24 VAC supply power to
the controller and all other network devices so
that transformer phasing is uniform across the
network devices. Powering network devices with
uniform 24 VAC supply power phasing reduces
noise, interference, and ground loop problems.
The controller does not require an earth ground
connection. However, when grounding the
secondary of the 24 VAC transformer is required,
only one connection to ground must be made near
the transformer. See Figure 10.
Figure 10: Transformer grounding
Risk of Property Damage:
Do not apply power to the system before checking all
wiring connections. Improper wiring of this terminal
may cause a short circuit across the 24 VAC power
supply. A short circuit may result in a tripped circuit
breaker or blown fuse. If using a transformer with a
built-in fuse, the transformer may need to be replaced.
CAUTION
Risque de dommages matériels:
Ne mettez pas l'appareil sous tension avant d'avoir
vérifié toutes les connexions du câblage. Le câblage
inadéquat de cette borne peut causer un court-
circuit sur l'alimentation électrique de 24 V c. Un
court-circuit peut causer le déclenchement du
disjoncteur ou le grillage d'un fusible. Si vous utilisez
un transformateur avec un fusible intégré, vous
pourriez devoir remplacer le transformateur.
To wire the controller, complete the following steps:
1. Terminate wiring according to the appropriate figure
in Termination
2. Wire network sensors and other devices to the SA
Bus.
3. Ensure that the CVM03050 is assigned a device
address and the CVE03050 is assigned a controller
number, using the rotary switches. See .
4. Connect the controller to 24 VAC, Class 2 power.
Note: If you are using the CVM03050 controller with
the Wireless Field Bus System, refer to the WNC1800/
FX-ZFR182x Pro Series Wireless Field Bus System Bulletin
(LIT-12012378) or the FX-ZFR Series Wireless Field Bus
System Bulletin (LIT-12011660).
Terminal wiring guidelines, functions,
ratings, and requirements
This section provides further guidelines on input and
output wiring, maximum cable length versus load current,
and SA Bus and supply power wiring.

Input and Output wiring guidelines

Table provides information and guidelines about the
functions, ratings, and requirements for the controller
input and output terminals, and Table also references
guidelines for determining proper wire sizes and cable
lengths.
In addition to the wiring guidelines in Table , observe the
following guidelines when wiring controller inputs and
outputs:
• Run all low-voltage wiring and cables separate from
high-voltage wiring.
• All input and output cables, regardless of wire size or
number of wires, must consist of twisted, insulated,
and stranded copper wires.
• Shielded cable is not required for input or output
cables but is recommended for input and output cables
that are exposed to high electromagnetic or radio
frequency noise.
• Cable runs of less than 30 m (100 ft) often do not
require an offset in the input/output software setup.
• Cable runs over 30 m (100 ft) often require an offset in
the input/output software setup.
F4-CV Series VAV Terminal Equipment Controllers Installation Guide
ATTENTION
diagrams.
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