scope:

This document describes the design of an Open UMCS including hardware, software, and networking.

PURPOSE

This document describes an Open-systems approach for the design of a Utility Monitoring and Control System (UMCS) in accordance with UFGS 25 10 10 LonWorks Utility Monitoring and Control System (UMCS). A UMCS is a supervisory management system that may be used to achieve utility cost, energy, and manpower savings for electrical systems, heating, ventilating, and air-conditioning, water and sanitary sewer systems, process equipment, lighting, chillers, boilers, and other utility systems and equipment. The UMCS is intended to openly interoperate with systems and subsystems installed in accordance with UFGS 23 09 23 LonWorks® Direct Digital Control for HVAC and Other Building Systems and accompanying UFC 3-410-02 LonWorks® Direct Digital Control for HVAC and Other Local Building Systems.

The Open systems approach specified by UFGS 25 10 10 and UFGS 23 09 29 and described in this document is based on the use of LONWORKS® technology, in particular the use of the LONWORKS® Network Services (LNS®) network operating system to provide an infrastructure for network tools and UMCS applications and the use of ANSI/CEA-709.1-C (sometimes referred to as LonTalk®; hereafter CEA-709.1) to ANSI/CEA-852 (hereafter CEA-852) routers to provide connectivity between the UMCS network and the building control network.

The UMCS is designed to work with Open building-level systems and is intended to be as Open as possible, but may have proprietary (closed) elements. It's important to note that the government's definition of a proprietary system is one that requires sole-source procurement for system modifications, and the UMCS as specified in UFGS 25 10 10 and this UFC does not.

APPLICABILITY

This UFC and accompanying UFGS 25 10 10 'LonWorks Utility Monitoring and Control System' are for use on all USACE and AFCESA projects. The NAVFAC standard is to use BACnet® for its DDC communication protocol and NAVFAC systems should use UFGS 23 09 23.13 20 'BACnet Direct Digital Control Systems for HVAC'. NAVFAC allows the use of LonWorks for upgrades and additions to legacy systems.

At the discretion of and with approval from the assigning government agency (such as the responsible Corps of Engineers District), the design of the UMCS may deviate from the standards defined in this UFC. When deviating from the guidance, systems based on an Open communications protocol are recommended and proprietary procurement or single-vendor systems are discouraged.