Johnson Controls Metasys FAC4911 Installation Manual page 9

Table 3: I/O terminal blocks, functions, ratings, requirements, and cables
Terminal block label Terminal label Function, ratings, requirements
O
ANALOG
(Outputs)
OCOMn
OUTn
BINARY
(Output)
OCOMn
OUTn
CONFIGURABLE
(Output)
OCOMn
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
10 mA maximum output current
Requires an external load of 1,000 Ω or more.
Note: The Analog Output (AO) operates in the
Voltage Mode when connected may not operate as
intended for Voltage Mode applications.
.
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.
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.
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 Common (for OUTn terminal)
Note: Each Binary Output Common terminal
(OCOMn) is isolated from all other commons,
including other Binary Output Common terminals.
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
or more.
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
Analog and Binary Output Signal Common All
Configurable Outputs (COs) defined as Binary Outputs
are isolated from all other commons, including other CO
commons.
FAC4911 Advanced Application Field Equipment Controller Installation Guide
Determine wire size and
maximum cable length
See Guideline C in Table .
See Guideline C in Table .
See Guideline A in Table
See Guideline C in Table
Same as (Configurable) OUTn
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