I/O terminal blocks, ratings, and
requirements
Table 3: I/O 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 IN
n
terminals.
Provides 100 mA total current
Same as (Universal)
IN
n
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 75kΩ pull-down
See Guideline
A
in Table .
Analog Input - Current Mode (4–20 mA)
Internal 100 Ω load impedance. See .
Note:
A current loop fail-safe jumper must be in
the Enable position to maintain a closed 4 to 20 mA
current loop. See .
See Guideline
B
in Table .
Analog Input - Resistive Mode (60–600kΩ )
Internal 12 V. 15k Ω pull-up
Qualified Sensors: 0–2kΩ potentiometer, RTD (1k Nickel
[ Johnson Controls sensor], 1k Platinum, and A99B Silicon
Temperature Sensor) Negative Temperature Coefficient
(NTC) Sensor
See Guideline
A
in Table .
IN
n
Binary Input - Dry Contact Maintained Mode
1 second minimum pulse width
Internal 12 V. 15kΩ pull-up
See Guideline
A
in Table .
UNIVERSAL
(Inputs)
ICOM
n
Universal Input Common
for all Universal Input
terminals
Note:
All Universal ICOM
n
terminals share a
common, which is isolated from all other commons,
except the SA bus common. One common screw
terminal point is provided for every two input screw
terminal points.
Same as (Universal)
IN
n
Binary Input - Dry Contact Maintained Mode
0.01 second minimum pulse width
Internal 18 V. 3k Ω pull-up
IN
n
Binary Input - Pulse Counter/Accumulator Mode
0.01 second minimum pulse width
(50 Hz at 50% duty cycle)
Internal 18 V. 3kΩ pull-up
BINARY
(Inputs)
ICOM
n
Binary Input Common
for all Binary Input (IN) terminals
Note:
All Binary ICOM
n
terminals share a common,
which is isolated from all other commons.
See Guideline
A
in Table .
FAC4911 Advanced Application Field Equipment Controller Installation Guide
8