Johnson Controls Metasys FAC4911, Installation Manual, Page: 3 / 24

FAC4911 model information
(including point type counts)
Table 2: FAC4911 model information (including point type counts)
Communication Protocol BACnet/IP
Engines Engines NAE55, NAE85, ODS
Modular Jacks
6-Pin SA Bus with four communicating
sensors
Point Types Signals Accepted Number of Points
Universal Input (UI)
Analog Input, Voltage Mode, 0–10 VDC
Analog Input, Current Mode, 4–20 mA
Analog Input, Resistive Mode, 0–2k ohm,
resistance temperature detector (RTD)
(1k NI [Johnson Controls], 1k PT, A99B SI),
negative temperature coefficient (NTC) (10k
Type L, 2.252k Type 2)
Binary Input, Dry Contact Maintained Mode
10
Binary Input (BI)
Dry Contact Maintained Mode
Pulse Counter/Accumulator Mode (High
Speed), 100 Hz
6
Analog Output (AO)
Analog Output, Voltage Mode, 0–10 VDC
Analog Current Mode, 4–20 mA
4
Binary Output (BO) 24 VAC Triac 4
Configurable Output (CO)
Analog Output, Voltage Mode, 0–10 VDC
Binary Output Mode, 24 VAC Triac
4
Mounting
Observe the following guidelines when mounting a
field controller:
• Ensure the mounting surface can support the
controller, DIN rail, and any user-supplied
enclosure.
• Mount the controller horizontally on 35 mm DIN
rail whenever possible.
• Mount the controller in the correct mounting
position (Figure 2).
• Whenever possible in wall-mount applications,
mount the controller on a hard, even surface.
• Use shims or washers to mount the controller
securely and evenly on the mounting surface.
• Mount the controller in an area free of corrosive
vapors and observe the ambient conditions
requirements in Technical specifications .
• Provide sufficient space around the controller for
cable and wire connections, easy cover removal,
and good ventilation through the controller (50
mm [2 in.] minimum on the top, bottom, and
front of the controller).
• Do not mount the controller on surfaces prone to
vibration, such as ductwork.
• Do not mount the controller in areas where
electromagnetic emissions from other
devices or wiring can interfere with controller
communication.
Observe these additional guidelines when mounting
a field controller in a panel or enclosure:
• Mount the controller so that the enclosure walls
do not obstruct cover removal or ventilation
through the controller.
• Mount the controller so that the power
transformer and other devices do not radiate
excessive heat to the controller.
• Do not install the controller in an airtight
enclosure.
FAC4911 Advanced Application Field Equipment Controller Installation Guide 3