Johnson Controls FEC26 Series Installation Guide

Input/Output Terminal Blocks, ratings
and requirements
The following table shows the input/output requirements
and ratings for the controllers.
Table 3: Terminal blocks, functions, ratings, requirements, and cables
Terminal block label Terminal label Function, ratings, requirements
Determine wire size and maximum cable
length
+15 V
15 VDC Power Source for active (3-wire)
input devices connected to the Universal
INn terminals.
Provides 100 mA total current
Same as (Universal) INn
Note: Use 3-wire cable for devices
that source power from the +15V
terminal.
Analog Input - Voltage Mode (0–10 VDC)
10 VDC maximum input voltage
Internal 75k ohms Pull-down
See Guideline A in Table 4.
Analog Input - Current Mode (4–20 mA)
Internal 100 ohms load impedance
Note: A current loop fail-safe jumper
can be positioned to maintain a
closed 4 to 20 mA current loop, even
when the power to the controller is
interrupted or off. See the Universal
Input current loop jumpers section.
See Guideline B in Table 4.
Analog Input - Resistive Mode (0–600k
ohms)
Internal 12 V. 15k ohms pull up
Qualified Sensors: 0–2k ohms
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 4.
INn
Binary Input - Dry Contact Maintained
Mode
1 second minimum pulse width
Internal 12 V. 15k ohms pull up
See Guideline A in Table 4.
UNIVERSAL
(Inputs)
ICOMn
Universal Input Common for all Universal
Input terminals
Note: All Universal ICOMn terminals
are isolated from all other commons.
Same as (Universal) INn
Binary Input - Dry Contact Maintained
Mode
0.01 second minimum pulse width
Internal 18 V. 3k ohms pull up
INn
Binary Input - Pulse Counter/
Accumulator Mode
0.01 second minimum pulse width
(50 Hz at 50% duty cycle)
Internal 18 V. 3k ohms pull up
BINARY
(Inputs)
ICOMn
Binary Input Common for all Binary Input
(IN) terminals
Note: All Binary ICOMn terminals
are isolated from all other commons,
except the Configurable Output (CO)
common (OCOMn) when the CO is
defined as an Analog Output.
See Guideline A in Table 4.
FEC26 Field Equipment Controllers Installation Guide8

Johnson Controls FEC26 Series Specifications

General

Brand	Johnson Controls
Model	FEC26 Series
Category	Controller
Language	English