Johnson Controls FEC26 Series Installation Manual page 8

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
+15 V
UNIVERSAL
INn
(Inputs)
ICOMn
INn
BINARY
(Inputs)
ICOMn
8 FEC26 Field Equipment Controllers Installation Guide
Function, ratings, 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 ohms Pull-down
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
Input current loop jumpers
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)
Binary Input - Dry Contact Maintained
Mode
1 second minimum pulse width
Internal 12 V. 15k ohms pull up
Universal Input Common for all Universal
Input terminals
Note: All Universal ICOMn terminals
are isolated from all other commons.
Binary Input - Dry Contact Maintained
Mode
0.01 second minimum pulse width
Internal 18 V. 3k ohms pull up
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 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.
Determine wire size and maximum cable
length
Same as (Universal) INn
Note: Use 3-wire cable for devices
that source power from the +15V
terminal.
See Guideline A in Table 4.
See Guideline B in Table 4.
Universal
section.
See Guideline A in Table 4.
See Guideline A in Table 4.
Same as (Universal) INn
See Guideline A in Table 4.