Johnson Controls Metasys FEC Series Installation Manual page 6

Table 2: FEC16 terminal blocks, functions, ratings, requirements, and cables
Terminal
Terminal block label
label
+15 V
UNIVERSAL
INn
(Inputs)
ICOMn
INn
BINARY
(Inputs)
ICOMn
BINARY
OUTn
(Output)
Power Selection Jumper
positioned to External
(EXT) power.
OCOMn
6 Metasys System FEC1611 and FEC1621 Field Equipment Controller 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 ohm Pull-down
Analog Input - Current Mode (4–20 mA)
Internal 100 ohm load impedance
Note: Current loop jumpers are fail-safe to maintain a
closed 4 to 20 mA current loop, even when the power to
the controller is interrupted or off. See
current loop jumpers.
Analog Input - Resistive Mode (0–600k ohm)
Internal 12 V, 15k ohm pull up
Qualified Sensors: 0-2k ohm 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 Input 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.
Binary Output - 24 VAC Triac (External Power Source)
Connects OUTn to OCOMn when activated.
External Power Source Requirements:
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
Binary Output Common (for OUTn terminal)
Note: Each Binary Output Common terminal (OCOMn) is
isolated from all other commons, including other Binary
Output Common terminals.
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 3.
See Guideline B in Table 3.
Universal Input
See Guideline A in Table 3.
See Guideline A in Table 3.
Same as (Universal) INn
See Guideline A in Table 3.
See Guideline C in Table 3.