Mounting Features And Dimensions - Johnson Controls FX-PCA4911 Installation Manual

FX-PCA4911 model information
(including point type counts)
Table 2: FX-PCA4911 model information (including point type counts)
Communication Protocol
Modular Jacks
Point Types
Universal Input (UI)
Binary Input (BI)
Analog Output (AO)
Binary Output (BO)
Configurable Output (CO)
Mounting
Observe the following guidelines when mounting a
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
controller in a panel or enclosure:
• Mount the controller so that the enclosure walls do
not obstruct cover removal or ventilation through the
controller.
Signals Accepted
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
Dry Contact Maintained Mode
Pulse Counter/Accumulator Mode (High
Speed), 100 Hz
Analog Output, Voltage Mode, 0–10 VDC
Analog Current Mode, 4–20 mA
24 VAC Triac
Analog Output, Voltage Mode, 0–10 VDC
Binary Output Mode, 24 VAC Triac
• Mount the controller so that the power transformer
• Do not install the controller in an airtight enclosure.
Figure 2: Controller Mounting Positions

Mounting Features and Dimensions

See Figure 3 for mounting dimensions in millimeters and
inches. Inches are listed in parenthesis. Figure 3 also
illustrates the DIN rail channel and the mounting clips in
an extended position.
FX-PCA4911 Advanced Application Controller Installation Guide
BACnet/IP
6-Pin SA Bus with four communicating
sensors
Number of Points
10
6
4
4
4
and other devices do not radiate excessive heat to the
controller.
3