Fec Terminal Functions, Ratings, Requirements, And Wiring Guidelines - Johnson Controls FEC26 Installation Instructions Manual

FEC Terminal Functions, Ratings,
Requirements, and Wiring Guidelines
Input and Output Wiring Guidelines
Table 1 provides information and guidelines about the
functions, ratings, and requirements for the FEC 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
these guidelines when wiring FEC inputs and outputs:
• Run all low-voltage wiring and cables separate
from high-voltage wiring.
Table 1: I/O Terminal Blocks, Functions, Ratings, Requirements, and Cables (Part 1 of 3)
Terminal Block Terminal
Label Labels
UNIVERSAL +15 V
(Inputs)
INn
ICOMn
BINARY INn
(Inputs)
ICOMn
FEC26 Extended Temperature Field Equipment Controller Installation Instructions
Function, Ratings, and 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 Pulldown
Analog Input - Current Mode (4-20 mA)
Internal 100 ohm load Impedance
Note: A current loop fail-safe jumper can be positioned
to maintain a closed 4-20 mA current loop even when
power to the controller is interrupted or off. See Binary
Output Source Power Selection Jumpers.
Analog Input - Resistive Mode (0-600k ohm)
Internal 12 V, 15k ohm pull up
Qualified Sensors: 0-2k 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 IN terminals
Note: All Universal ICOMn terminals share a common,
which is isolated from all other commons.
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.
• 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.
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 2.
See Guideline B in Table 2.
See Guideline A in Table 2.
See Guideline A in Table 2.
Same as (Universal) INn.
See Guideline A in Table 2.
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