The 3-CPU3 is the Central Processing Unit Module monitoring the status of all modules and providing the link for network communications. Although each local rail card contains their own microprocessor, the 3-CPU3 provides all inter-module communication and has the ability to download rail module operating parameters. Upon power up the 3-CPU3 automatically learns all local rail module attributes and locations. Site specific software is loaded into the 3-CPU3 which then downloads data to each local rail module. Firmware upgrades are also done from the 3-CPU3 eliminating the need to unplug chips on rail modules. The 3-CPU3 is fully compatible on the same network with the 3-CPU and 3-CPU1 modules. Specifications Agency Listings UL, ULC, CSFM, CE, LPCB EN54*. Mounting 2 - Left most local rail spaces Terminal Size 18-12 AWG (1.0mm² to 2.5mm²) Standby Current 155 mA Alarm Current 165 mA Contact Ratings Nonbypassable Alarm, Supervisory and Trouble Form ‘C’ 1A at 30 Vdc Data Down Loading RJ14 Jack Operating Environment 0°C - 49°C (32° F - 120° F); 93% at 40° C Non-Condensing