Johnson Controls IOM3721, Руководство по установке

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Terminal Wiring Guidelines,
Functions, Ratings, and
Requirements
Input and Output Wiring Guidelines
Table 2 provides information and guidelines about the
functions, ratings, and requirements for the controller
input and output terminals; and references guidelines for
determining proper wire sizes and cable lengths.
In addition to the wiring guidelines in Table 2 , observe
these guidelines when wiring controller inputs and
outputs:
• Run all low-voltage wiring and cables separate from
high-voltage wiring.
• All input and output cables, regardless of wire size or
number of wires, should consist of stranded, insulated,
and twisted copper wires.
• Shielded cable is not required for input or output
cables.
• Shielded cable is recommended for input and output
cables that are exposed to high electromagnetic or
radio frequency noise.
• Inputs/outputs with cables less than 30 m (100 ft)
typically do not require an offset in the software setup.
Cable runs over 30 m (100 ft) may require an offset
in the input/output software setup.
Table 2: IOM3721 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 3 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 3 to determine wire size and cable lengths for cables.
6 IOM3721 Input/Output Module Installation Instructions