1–2
EPM 4
5
00 SUB METER – INSTRUCTION MANUAL
APPLICATIONS
CHAPTER 1: OVERVIEW
1.2
Applications
1.2.1
Stand-Alone Meter
The GE
Energy
EPM4
5
00 can be installed as a stand-alone device that is locally accessed
via the LCD or remotely accessed via modem. A modem can be installed in each meter
allowing the meter(s) to be read remotely.
1.2.2
Metering System
The GE
Energy
EPM4
5
00 family of meters are ideally designed to comprise a metering
system within a residential/commercial building or industrial site. This metering system
can measure electrical usage for each tenant, cost center, or common area space and
communicate this information over the building's power wires or dedicated
communication wiring (RS485). A metering system is comprised of two or more EPM4
5
00
meters and at least one communication transponder (see figure below). The transponder
collects metering data from multiple meters via AC power lines. For larger sites, additional
transponders may be required. Multiple transponders can communicate via a data link
network using RS485 or via a wireless network.
The metering data can be accessed from the transponder or network of transponders
using a telephone modem or local RS232 connection to a PC for data transfers.
FIGURE 1–1: Overview of Scan Transponder Functionality
709712A1.CDR
