Johnson Controls FAC4911 User Manual

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
Analog Output - Current Mode (4–20 mA)
Requires and external load between 0 and 300 ohm.
Note: The Analog Output (AO) operates in the
Current Mode when connected to devices with
impedances less than 300 Ω. Devices that exceed
below 300 Ω may not operate as intended for
Current Mode applications.
OCOMn Analog Output Signal Common for all Analog OUT
terminals.
Note: All Analog Output Common terminals
(OCOMn) share a common, which is isolated from
all other commons. One common screw terminal
point is provided for every two output screw
terminal points.
OUTn Binary Output - 24 VAC Triac Class 2, 24 V, 500 mA
(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)
OCOMn 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.
See Guideline C in Cable and wire
length guidelines.
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
or more.
See Guideline A in Cable and
wire length guidelines
OUTn
Binary Output - 24 VAC Triac (External Power Source
only)
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
See Guideline C in Cable and wire
length guidelines
CONFIGURABLE
(Output)
OCOMn Analog and Binary Output Signal Common All
Configurable Outputs (COs) defined as Binary Outputs
are isolated from all other commons, including other CO
commons.
Same as (Configurable) OUTn
Cable and wire length guidelines
The following table defines cable length guidelines for the
various wire sizes that may be used for wiring low-voltage
(<30 V) input and outputs.
Note: The required wire sizes and lengths for high-
voltage (>30 V) Relay Outputs are determined by the
load connected to the relay, and local, national, or
regional electrical codes.
FAC4911 Advanced Application Field Equipment Controller Installation Guide8

Johnson Controls FAC4911 Specifications

General

Brand	Johnson Controls
Model	FAC4911
Category	Controller
Language	English