Johnson Controls FX-PCX3721, Руководство по установке

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Table 3: FX-PCX3721 Terminal Blocks, Functions, Ratings, Requirements, and Cables
Determine Wire Size and
Maximum Cable Length
1
Function, Ratings, Requirements Terminal
Label Terminal Block
Label
See Guideline A in Table 4 Binary Input - Dry Contact Maintained Mode
0.01 second minimum pulse width Internal 18 V, 3k ohm
pull up
IN n BINARY INPUT
Binary Input - Pulse Counter/Accumulator Mode
0.01 second minimum pulse width
(50 Hz at 50% duty cycle)
Internal 18 V, 3k ohm pull up
Binary Input Common for all Binary Input (IN) terminals
Note: All Binary ICOM n terminals share a common, which
is isolated from all other commons, except the Configurable
Output (CO) common (OCOM
n ) when the CO is defined
as an Analog Output.
ICOM n
1 See Table 4 to determine wire size and cable lengths for cables.
Cable and Wire Length
Guidelines
Table 4 defines cable length guidelines for the various
wire sizes that may be used for wiring low-voltage (<30V)
input and outputs.
Table 4: Cable Length Guidelines for Recommended Wire Sizes for Low-Voltage (<30V) Inputs and Outputs
Assumptions Maximum Cable
Length and Type Wire Size/Gauge and Type Guideline
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.
457 m (1,500 ft) twisted
wire
1.5 mm
2
(18 AWG) stranded copper
A
297 m (975 ft) twisted wire 0.8 mm (20 AWG) stranded copper
183 m (600 ft) twisted wire 0.6 mm (22 AWG) stranded copper
107 m (350 ft) twisted wire N/A (24 AWG) stranded copper
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.
229 m (750 ft) twisted wire
1.5 mm
2
(18 AWG) stranded copper
B
137 m (450 ft) twisted wire 0.8 mm (20 AWG) stranded copper
91 m (300 ft) twisted wire 0.6 mm (22 AWG) stranded copper
61 m (200 ft) twisted wire N/A (24 AWG) stranded copper
N/A See Figure 8 to determine
cable length. Use twisted
wire cable.
See Figure 8 to select wire size/gauge.
Use stranded copper wire
C
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 (<30V) inputs and
outputs only.
7 FX-PCX3721 Expansion Input/Output Module Installation Instructions