To wire the FX-PCV controller:
1. Terminate wiring per engineering drawings.
2. Wire network sensors and other devices to the FX-PCV'sSA Bus.
3. Wire the FC Bus in a daisy chain.
4. Ensure that the FX-PCV’s device address DIP switches are set to the appropriate device address.
(See
5. Connect the FX-PCV controller to 24 VAC, Class 2 power.
FX-PCV terminal functions, ratings, requirements, and wiring
guidelines
Input and Output wiring guidelines
Table 2 provides information about the functions, ratings, and requirements for the FX-PCV input
and output terminals; and references guidelines for determining proper wire sizes and cable
lengths.
In addition to the wiring guidelines in Table 2, observe these guidelines when wiring FX-PCV 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, should consist of twisted,
insulated, and stranded copper wires.
• Shielded cable is not required for input or output cables.
• Shielded cable is recommended for input and output cables that are exposed to high
electromagnetic or radio frequency noise.
• Cable runs that are less than 30 m (100 ft) typically do not require an offset in the input/output
software setup. Cable runs that are over 30 m (100 ft) may require an offset in the input/output
software setup.
Input and Output wiring guidelines tables
Table 2: I/O terminal blocks, functions, ratings, requirements, and cables
Terminal block
label
Terminal
labels
Function, ratings, and
requirements
To determine wire size
and maximum cable
length
UNIVERSAL
(Inputs)
+15 V
15 VDC Power Source
for active (3-
wire) input devices connected to the
Universal IN
n
terminals.
Provides 100 mA total current.
Same as (Universal)
IN
n
.
Note:
Use 3-wire
cable for devices
that source power
from the +15 V
terminal.
FX-PCV Programmable Variable Air Volume Box Controllers Installation Instructions
8