Terminal Wiring Guidelines, Functions, Ratings, And Requirements; Input And Output Wiring Guidelines - Johnson Controls IOM3731-0A Installation Instructions Manual

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.
Table 2: IOM3731-0A Terminal Blocks, Functions, Ratings, Requirements, and Cables
Terminal Block Terminal
Label Label
BINARY INPUT INn
ICOMn
BINARY OUTn
OUPUT(External
Power Source Only)
OCOMn
1 See Table 3 to determine wire size and cable lengths for cables.
IOM3731-0A Input/Output Module Installation Instructions
Function, Ratings, Requirements
Binary Input - Dry Contact Maintained Mode
0.01 second minimum pulse width Internal 18 V, 3k ohm pull
up
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 ICOMn terminals share a common, which
is isolated from all other commons, except the
Configurable Output (CO) common (OCOMn) when
the CO is defined as an Analog Output.
Binary Output - 24 VAC Triac (External Power)
Connects OUTn to OCOMn when activated.
External Power Source Requirements:
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
Binary Output Common (for OUTn terminal)
Note: Each Binary Output common terminal (OCOMn) is
isolated from all other commons, including other
Binary Output commons.
In addition to the wiring guidelines in
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, observe
Determine Wire Size and
Maximum Cable Length
See Guideline A in Table 3
See Guideline C in Table 3
1
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