Terminal Wiring Guidelines, Functions, Ratings, And Requirements; Input And Output Wiring Guidelines - Johnson Controls IOM3711 Installation Instructions Manual

Terminal Wiring Guidelines,
Functions, Ratings, and
Requirements

Input and Output Wiring Guidelines

Table 3 provides information and guidelines about the
functions, ratings, and requirements for the expansion
module input and output terminals; and references
guidelines for determining proper wire sizes and cable
lengths.
Table 3: IOM37 Terminal Blocks, Functions, Ratings, Requirements, and Cables
Terminal Block Terminal
Label Label
UNIVERSAL +15 V
(Inputs)
INn
ICOMn
IOM3711 Input/Output Module Installation Instructions
Function, Ratings, Requirements
15 VDC Power Source for active (3-wire) input devices
connected to the Universal INn terminals.
Provides 100 mA total current
Analog Input - Voltage Mode (0–10 VDC)
10 VDC maximum input voltage
Internal 75k ohm Pull-down
Analog Input - Current Mode (4–20 mA)
Internal 100 ohm load impedance
Analog Input - Resistive Mode (0–600k ohm)
Internal 12 V. 15k ohm pull up
Qualified Sensors: 0-2k ohm potentiometer, RTD (1k Nickel
[Johnson Controls® sensor], 1k Platinum, and A99B Silicon
Temperature Sensor) Negative Temperature Coefficient
(NTC) Sensor (10k Type L, 10k JCI Type II, 2.252k Type
II)
Binary Input - Dry Contact Maintained Mode
1 second minimum pulse width
Internal 12 V. 15k ohm pull up
Universal Input Common for all Universal Input terminals
Note: All Universal ICOMn terminals share a common,
which is isolated from all other commons.
In addition to the wiring guidelines in
these guidelines when wiring expansion module 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 3, observe
Determine Wire Size and
Maximum Cable Length
Same as (Universal) INn
Note: Use 3-wire cable for
devices that source
power from the +15 V
terminal.
See Guideline A in Table 4.
See Guideline B in Table 4.
See Guideline A in Table 4.
See Guideline A in Table 4.
Same as (Universal) INn
10