Home / Control Panels / Accessories / Central Processing Units (CPU) / Edwards EST 3-CPU1 Edwards EST 3-CPU1 Central Processor Module Request a Quote This product is already on your Quote Request Browse your Quote Request Brand: EST FireAlarm.com Part #: 39580 Categories: Accessories, Central Processing Units (CPU) Manufacturer Part #: 3-CPU1 Description Specifications Resources Resources Description The 3-CPU1 controls all the communications and processing of information for modules located in its cabinet. Token ring network communications between CPU modules in other cabinets is also processed by the 3-CPU1. Network communications is RS-485 when the 3-RS485 card is installed in 3-CPU1 connector J2, and fiber optic when the 3-FIB module is connected to J2 of the 3-CPU1. Information Weight 0.80 lbs Brand Edwards, EST ResourcesUnity / EST3 Johnson Controls. Data Sheet. 2002. EST3 Edwards Systems Technology. Installation and Service Manual. 1999.