The PAC2 enables efficient control of lighting and other systems such as HVAC and security, and has been specifically designed for the Crestron automation enclosure and the Crestron lighting system (although other Crestron processors can also be used).
The PAC2 occupies one module space in single-width enclosures and two module spaces in double-width enclosures.
NOTE: Crestron recommends that the control processor be mounted within a separate CAEN enclosure to create a simplified low voltage wiring center.
Cresnet® Distribution
The built-in Cresnet Hub/Repeater serves as a repeater, splitter, and wiring block. The hub allows for 252 or more devices (touchpanels, keypads, etc.); 32 per segment (A-
H)and distribution up to 3000 feet of Cresnet cable run per segment. There are eight independent segments, each with four Cresnet connectors wired in parallel.
In addition, there is a master NET port on the bottom panel. The eight NET (A-H) activity LEDs illuminate when a device on the respective segment transmits data. When powered by the internal power supply, a maximum of 50 watts (DC) is available for all connected network devices. The LEDs indicate communication on the Cresnet link.
Memory Expansion
The on-board 36MB memory is enhanced with a 4GB expansion slot that supports off-the-shelf Type II compact flash memory and the IBM Microdrive® hard disk drive, for
on-board storage of program and touchpanel files, room and equipment profiles, upgrades, databases, and schedules. Memory is non-volatile to protect against power loss.
Ethernet and e-Control®2
The unique Crestron dual bus system, with its high speed I/O bus architecture, provides blazing fast throughput, system wide. The two 40Mb/s Y-BUS expansion slots offer the option of installing any of the CNX-series cards and all C2-series control cards listed in the Crestron Product Catalog. The 300Mb/s Z-BUS expansion slot is designed for super high speed control card applications such as 10/100 Ethernet, available via the Crestron single-port C2ENET-1 or dual-port C2ENET-2 cards.
The PAC2 also provides true secure network communications, which is required for today's corporate networks, automated residence systems, and the Internet. The Dual Port 10/100BaseT Ethernet card (C2ENET-2) supports dynamic and static IP addressing and full duplex TCP/IP and UDP/IP. It offers a WAN port for Internet and remote-location communications and a LAN port for local in-home or in-office use. A built-in firewall delivers network security with the Network Address Translator (NAT) and router functions. The built-in Web server uses memory storage on a compact flash card for remote access and control.
Backup and Override
The PAC2 provides external connections for both a back- up processor and emergency override closure signals. In the absence of Cresnet, a signal is generated to switch power and communication of the Cresnet system to the back-up processor. When the override connection receives a contact closure, a signal is passed to the lighting modules via the fifth wire of the module interconnect cable, and the lights are turned on to a programmed preset emergency level. They remain at this level until that contact closure is removed.
The Backup Net Input connector allows a backup control system to automatically take control of the Cresnet network in the unlikely event of an internal processor failure. The exclusive, built-in Cresnet watchdog switches over when the CPU fails.
