Johnson Controls CVM03050, Installation Manual

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Table 5: 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
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
10 mA maximum output current
External 1k to 50k ohm load required
See Guideline A in Table 6.
CO-n
Binary Output 24 VAC Triac
Connects CO-n to CO-C when activated.
External Power Source:
30 VAC maximum voltage to load
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
See Guideline C in Table 6.
Analog Output Signal Common : All Configurable
Outputs defined as Analog Outputs share a
common, which is isolated from all other commons
except the Binary Input common.
CONFIGURABLE
(Outputs)
CO-C
Binary Output Signal Common : All Configurable
Outputs defined as Binary Outputs are isolated
from all other commons, including other
Configurable Output commons.
Same as (Configurable) CO-n .
BO-n
Binary Output - 24 VAC Triac (Internal Power)
Sources internal 24 VAC power (24~ HOT)
See Guideline C in Table 6.
BINARY
(Outputs)
BO-C
Binary Output - 24 VAC Triac (Internal Power)
Connects BO-n to 24~ BO-C when activated.
Internal Power Source:
30 VAC maximum voltage to load
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
See Guideline C in Table 6.
Cable and wire length guidelines
Table 6 defines cable length guidelines for the various wire sizes that may be used for wiring low-voltage (<30 V) input
and outputs. The required wire sizes and lengths for high-voltage (>30 V) Relay Outputs are determined by the load
connected to the relay, and local, national or regional electrical codes.
Table 6: Cable length guidelines for recommended wire sizes
Guideline Wire size/gauge and type
Maximum cable length and
type
Assumptions
1.0 mm (18 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
0.5mm (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.
M4-CVM VAV Box Controllers Installation Guide 8