FEC16 Extended Temperature Field Equipment Controller Installation Instructions 7
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:
•Runall 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 1: I/O Terminal Blocks, Functions, Ratings, Requirements, and Cables (Part 1 of 2)
Terminal Block
Label Terminal
Labels Function, Ratings, and Requirements Determine Wire Size and
Maximum Cable Length1
UNIVERSAL
(Inputs) +15 V 15 VDC Power Source for active (3-wire) input devices
connected to the Universal INnterminals.
Provides 100 mA total current.
Same as (Universal) INn.
Note: Use 3-wire cable for
devices that source power
from the +15 V terminal.
INnAnalog Input - Voltage Mode (0-10 VDC)
10 VDC maximum input voltage
Internal 75k ohm Pulldown
See Guideline A in Table 2.
Analog Input - Current Mode (4-20 mA)
Internal 100 ohm load Impedance
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 Universal Input
Current Loop Jumpers.
See Guideline B in Table 2.
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)
See Guideline A in Table 2.
Binary Input - Dry Contact Maintained Mode
1 second minimum pulse width
Internal 12 V, 15k ohm pull up
See Guideline A in Table 2.
ICOMnUniversal Input Common for all Universal IN terminals
Note: All Universal ICOMnterminals share a common,
which is isolated from all other commons.
Same as (Universal) INn.
BINARY
(Inputs) INnBinary Input - Dry Contact Maintained Mode
0.01 second min. pulse width
Internal 18 V, 3k ohm pull up
See Guideline A in Table 2.
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
ICOMnBinary Input Common for all Binary Input (IN) terminals
Note: All Binary ICOMnterminals 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.
