PCA Series Controllers are programmable controllers that can communicate using BACnet/ IP, MS/TP, or N2 communications protocols, depending on the model. The PCA4911 Series controller communicates using BACnet/IP communications protocol, and is a BACnet Advanced Application Controller (B-AAC). The other PCA Series controllers can be switched between MS/TP and N2 Communications protocols and when used as MS/TP devices are BACnet Advanced Application Controllers (B-AACs).
Realtime Clock
26-Point Advanced Application Programmable Controller with 8 UI, 6 BI, 6 BO, and 6 AO; 24 VAC; SA Bus; FC Bus; Integral Real-time Clock; Improved Fast Persistence
Supply Voltage
24 VAC (nominal, 20 VAC minimum/30 VAC maximum)
50/60 Hz
Power Supply Class 2 (North America)
Power Consumption
24 VAC (nominal, 20 VAC minimum/30 VAC maximum), 50/60 Hz, Power Supply Class 2 (North America)
Ambient Conditions
Operating: 0°C to 50°C (32°F to 122°F); 10% to 90% RH noncondensing; Pollution Degree 2 Storage: -40°C to 80°C (-40°F to 176°F); 5% to 95% RH noncondensing
Controller Addressing
DIP switch set: valid field controller device addresses 4-127 (device addresses 0–3 and 128–255 are reserved)
Communications Bus
RS-485, field selectable between BACnet MS/TP and N2 communications: 3-wire FC Bus between the supervisory controller and FX-PC controllers 4-wire SA Bus between FX-PC controller, NS Series Network Sensors, and other sensor/ actuator devices, includes a lead to source 15 VDC supply power (from FX-PC controller) to bus devices
Processor
RX630 32-Bit Renesas microcontroller
Memory
16 MB Flash Memory and 8 MB RAM
Supercapacitor maintains power to the onboard real-time clock for a minimum of 72 hours when supply power to the controller is disconnected.
Terminations
Input/Output: Fixed Screw Terminal Blocks
FC Bus, SA Bus and Supply Power: 3-wire and 4-wire Pluggable Screw Terminal Blocks
FC Bus and SA Bus Port: RJ-12 6-pin Modular Jacks
Mounting
Horizontal on single 35 mm DIN rain mount (preferred), or screw mount on flat surface with three integral mounting clips on controller
Housing
Enclosure material: ABS and polycarbonate UL94 5VB; self-extinguishing; Plenum-rated Protection Class: IP20 (IEC529)
