
In addition to the guidelines in Table 5, observe these guidelines when wiring the SA/FC Buses and
supply power:
• Run
all
low-voltage wiring and cables separate from high-voltage wiring.
• All FC and SA Bus cables, regardless of wire size, should be twisted, insulated, stranded copper
wire.
• Shielded cable is strongly recommended for all FC and SA Bus cables.
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
1
+15 V
15 VDC Power Source
for active (3-
wire) input devices connected to the
Universal INn terminals.
Provides 35 mA total current.
Same as (Universal)
IN
n
.
Note:
Use 3-wire
cable for devices
that source power
from the +15 V
terminal.
Analog Input - Voltage Mode (0–10
VDC)
10 VDC maximum input voltage
Internal 75k ohm Pulldown
See Guideline A in
Analog Input - Resistive Mode (0–
600k ohm)
Internal 12 V, 15k ohm pull up
Qualified Sensors: 0–2k
potentiometer,
RTD (1k Nickel [ Johnson Controls
®
sensor],
1k Platinum, and A99B Silicon
Temperature Sensor)
Negative Temperature Coefficient
(NTC) Sensor
10K Type L (10K JCI Type II is
equivalent to Type L) or 2.252K Type
II
See Guideline A in
UNIVERSAL
(Inputs)
IN
n
Binary Input - Dry Contact
Maintained Mode
1 second minimum pulse width
Internal 12 V, 15k ohm pull up
See Guideline A in
11
PCV1617 and PCV1632 VAV Box Controllers Installation instructions