
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
Binary Output Signal Common
:
All Configurable Outputs defined
as Binary Outputs are isolated from
all other commons, including other
Configurable Output commons.
1
Table 3 defines cable length guidelines for the various wire sizes that may be used for input and output wiring.
Table 3: Cable length guidelines for recommended wire sizes
Guideline
Wire size/Gauge and
type
Maximum cable
length and type
Assumptions
1.5 mm (16 AWG)
stranded copper
457 m (1,500 ft) twisted
wire
0.8 mm (20 AWG)
stranded copper 297 m
(975 ft) twisted wire
297 m (975 ft) twisted
wire
0.6 mm (22 AWG)
stranded copper 183 m
(600 ft) twisted wire
183 m (600 ft) twisted
wire
A
N/A (24 AWG) stranded
copper 107 m (350 ft)
twisted wire
107 m (350 ft) twisted
wire
100 mV maximum
voltage drop
Depending on the
cable length and the
connected input or
output device, you may
have to define an offset
in the setup software
for the input or output
point.
1.5 mm (18 AWG)
stranded copper
229 m (750 ft) twisted
wire
0.8 mm (20 AWG)
stranded copper 297 m
(975 ft) twisted wire
137 m (450 ft) twisted
wire
0.6 mm (22 AWG)
stranded copper 183 m
(600 ft) twisted wire
91 m (300 ft) twisted
wire
B
24 AWG stranded copper
107 m (350 ft) twisted
wire
61 m (200 ft) twisted
wire
100 mV maximum
voltage drop
Depending on the
cable length and the
connected input or
output device, you may
have to define an offset
in the setup software
for the input or output
point.
C
See Figure 8 to select
wire size/gauge.
Use stranded copper
wire.
See Figure 8 to
determine cable
length.
Use twisted wire cable.
N/A
Termination diagrams
A set of Johnson Controls termination diagrams provides details for wiring inputs and outputs to
the controllers. See the figures in this section for the applicable termination diagrams.
13
PCV1617 and PCV1632 VAV Box Controllers Installation instructions