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Terminal wiring guidelines, functions, ratings, and requirements
Input and output wiring guidelines
Table 4 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 4, observe the following guidelines when you wire controller inputs and
outputs:
•
Run all low-voltage wiring and cables separately 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.
•
You do not need shielded cable for input or output cables.
•
It is best practice to use shielded cable for input and output cables that are exposed to high electromagnetic or
radio frequency noise.
•
Inputs and 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 4: IOM terminal blocks, functions, ratings, requirements, and cables (Part 1 of 2)
Terminal block
Terminal
label
label
UNIVERSAL
+ 15 V
(inputs)
(IOM5711)
+ 5 V
INn
ICOMn
Function, ratings, requirements
15 VDC power source for active (3-wire) input devices
connected to the universal INn terminals.
Provides 200 mA total current
5 VDC power source for active (3-wire) input devices
connected to the universal INn terminals.
Provides 50 mA total current
Analog input - Voltage Mode (0 VDC–10 VDC)
10 VDC maximum input voltage
Internal 75k ohm pull down
Analog input - Current Mode (4 VDC–20 mA)
Internal 100 ohm load impedance
Analog input - Resistive Mode (0 ohm–600k ohm)
Internal 11 V, 15k ohm pull up
Qualified sensors: 0k–2k ohm potentiometer, RTD (1k
Nickel [Johnson Controls sensor], 1k Platinum, and A99B
Silicon Temperature Sensor) NTC sensor (10k Type L, 10k
Johnson Controls Type II, 2.252k Type II)
Binary input - Dry Contact Maintained mode
1 second minimum pulse width
Internal 11 V, 15k ohm pull up
Universal input common for all universal input terminals
Note: All universal ICOMn terminals share a common,
which is not isolated from all other commons.
PEAK® IOM57 Input/Output Modules Installation Instructions
11
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 5.
See guideline B in Table 5.
See guideline A in Table 5.
See guideline A in Table 5.
Same as (universal) INn
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