Table 1 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 1, 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.
| Terminal block label | Terminal label | Function, ratings, requirements | Determine wire size and maximum cable length |
|---|---|---|---|
|
UNIVERSAL
(inputs) (IOM5711) |
+ 15 V |
15 VDC power
source for active (3-wire) input devices connected
to the universal INn terminals. Provides 200 mA total current |
Same as (universal)
INn
Note: Use 3-wire cable for devices that source power
from the + 15 V terminal.
|
| + 5 V |
5 VDC power
source for active (3-wire) input devices connected
to the universal INn terminals. Provides 50 mA total current |
||
| IN n |
Analog input -
Voltage Mode (0 VDC–10 VDC)
10 VDC maximum input voltage Internal 75k ohm pull down |
See guideline A in Table 1. | |
|
Analog input -
Current Mode (4 VDC–20 mA)
Internal 100 ohm load impedance |
See guideline B in Table 1. | ||
|
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) |
See guideline A in Table 1 . | ||
|
Binary input -
Dry Contact Maintained mode
1 second minimum pulse width Internal 11 V, 15k ohm pull up |
See guideline A in Table 1. | ||
| ICOM n |
Universal input
common for all universal input terminals Note: All universal ICOMn terminals share a common,
which is not isolated from all other commons.
|
Same as (universal) INn | |
|
Analog
(outputs) (IOM5731) |
OUT n |
Analog output -
Voltage mode (0 VDC–10 VDC)
10 VDC maximum output voltage 10 mA maximum output current Requires an external load of 1,000 ohm or more. Note: The AO operates in the Voltage mode when it is
connected to devices with impedances greater then 1,000 ohm.
Devices that drop below 1,000 ohm may not operate as intended
for Voltage mode applications.
|
See guideline A in Table 1 . |
| OCOM n |
AO
common
Note: All analog OCOMn terminals share a common,
which is not isolated from all other commons.
|
Same as OUT | |
|
RELAY
(outputs) (IOM5731) |
OUT NO n |
Normal open
contact
Connects OCOM to OUT NO when activated. UL Listed 1/4 hp 120 VAC, 1/2 hp 240 VAC 360 VA Pilot Duty at 120/240 VAC (B300) 3 A Non-inductive 24 VAC–240 VAC CE Marking 24 VAC, 6 (4) amperes N.O. or N.C. only, SELV CE Marking 6 (4) A N.O. or N.C. only, 240 VAC |
The relay
output terminals can accommodate the following maximum wire sizes:
Two wires per terminal: 1.5 mm2 (16 AWG) maximum wire size or One wire per terminal: 2.5 mm2 (12 AWG) maximum Note: You must determine the required wire size for the
high-voltage (>30 V) terminals according to relay ratings,
the applied load, and the local, national, or regional
electrical codes.
|
| OCOM n |
Relay
common
Isolated from all other terminal commons, including other Relay Commons. |
||
| OUT NC n |
Normal closed
contact
Connects OCOM to OUT NC when not activated. UL Listed 1/4 hp 120 VAC, 1/2 hp 240 VAC 360 VA Pilot Duty at 120/240 VAC (B300) 3 A Non-inductive 24–240 VAC CE Marking 6 (4) A N.O. or N.C. only, 240 VAC Note: OUT1 through OUT4 and OUT5 through OUT8 are groups
that must be powered by compatible voltage levels. Isolation
insulation exists within the two groups. For example, 24 V I/O
can connect to OUT1 through OUT4, and high voltage I/O can
connect to OUT5 through OUT8.
Note: You cannot mix voltage levels within the
groups.
|