Cable And Wire Length Guidelines; Cable Length Guidelines For Recommended Wire Size - Johnson Controls IOM1711 Installation Manual

Table 2: IOM17 and IOM27 terminal blocks, functions, ratings, requirements, and cables
Terminal
Terminal block label
label
OUTn
Universal
(Outputs)
(IOM27)
OCOMn
OUT NOn
RELAY
n
OCOMn
(Outputs)
(IOM27)
OUT NCn

Cable and wire length guidelines

Table 3 defines cable length guidelines for the
various wire sizes that may be used for wiring low-
voltage (<30 V) input and outputs.
10 IOM1711 and IOM2711 Input/Output Module Installation Guide
Function, ratings, requirements
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
10 mA maximum output current
Required an external load of 1,000 ohm or more.
Note: The Analog Output (AO) operates in the Voltage
Mode when connected to devices with impedances
greater than 1,000 ohm. Devices that drop below 1,000
ohm may not operate as intended for Voltage Mode
applications.
Analog Output - Current Mode (4–20 mA)
Requires and external load between 0 and 300 ohm.
Note: The Analog Output (AO) operates in the Current
Mode when connected to devices with impedances less
than 300 ohm. Devices that exceed 300 ohm may not
operate as intended for Current Mode applications.
Binary Output Mode - 24 VAC/DC Field-effect Transistor
(FET)
Connects OUTn to OCOMn when activated.
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current (hold current)
Universal Output (UO) Common
Isolated from all other terminal commons, including other UO
Commons.
Normal Open Contact
Connects OCOM to OUT NO when activated.
UL Listed (-0 model only)
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 (-2 model only): 6 (4) A N.O. or N.C. only, 240 VAC
Relay Common
Isolated from all other terminal commons, including other
Relay Commons.
Normal Closed Contact
Connects OCOM to OUT NC when activated.
UL Listed (-0 model only)
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 (-2 model only): 6 (4) A N.O. or N.C. only, 240 VAC
Cable length guidelines for
recommended wire size
Determine wire size and
maximum cable length
See Guideline A in Table 3.
See Guideline B in Table 3.
See Guideline B in Table 3.
Same as OUT
The Relay output terminals can
accommodate the following
maximum wire sizes:
Two wires per terminal:
1.3 mm (16 AWG) maximum wire
size
or
One wire per terminal:
2.0 mm (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.