Johnson Controls PCA3613, Руководство по установке

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Table 4: Cable length guidelines for recommended wire sizes for low-voltage (<30 V) Inputs
and Outputs
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
0.6 mm (22 AWG) stranded
copper
183 m (600 ft) twisted
wire
A
0.5 mm (24 AWG) stranded
copper
107 m (350 ft) twisted
wire
100 mV maximum voltage
drop
Depending on cable and
the connected input or
output device, you may
have to define an offset in
the setup software for the
input or output point.
1.0 mm (18 AWG) stranded
copper
229 m (750 ft) twisted
wire
0.8 mm (20 AWG) stranded
copper
137 m (450 ft) twisted
wire
0.6 mm (22 AWG) stranded
copper
91 m (300 ft) twisted
wire
B
0.5 mm (24 AWG) stranded
copper
61 m (200 ft) twisted
wire
100 mV maximum voltage
drop
Depending on cable 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
Maximum cable length versus load current
Use Figure 8 to estimate the maximum cable length relative to the wire size and the load current (in
mA) when wiring inputs and outputs.
Note: Figure 8 applies to low-voltage (<30 V) inputs and outputs only.
19 PCA3613 Advanced Application Programmable Controller Installation Instructions