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Embedded Micro Metering Module
SEM3 Sample Configuration
The SEM3 system is made up of the following components and options:
1. Controller – The controller is used to communicate the metered values to outside systems by way of a web page interface,
Modbus RTU, Modbus TCP, BACnet IP, and SNMP. One controller can manage up to 45 meter modules.
the system digital inputs for receiving pulse inputs for monitoring water and gas usage as well as a digital output for the
combined KWh output of the system being metered.
2. Meter Modules – There are two choices or the meter modules that are differentiated by accuracy specification. The accuracies
are 1% for the standard accuracy modules and ± 0.2% for the high accuracy modules. The accuracy is tested in accordance to
ANSI C12.20/0.5 by NRTL (Nationally Recognized Test Lab).
3. Meter Racks – The meter modules are designed to snap into the rack assemblies. The rack assemblies are sized by how many
modules will fit into each and come in 3, 9, 15 and 21 module configurations.
4. CT or Current Transformers – The SEM3 systems have solid core CTs or split core CTs for use with the system in the following
maximum amperage ranges 50, 125, 250, 400, 600, 800, 1200, 1600, and 2000 amps. These are maximum amperage ranges
for normal usage but will measure accurately down to 1% of the maximum range.
5. Communication Cables – The communication cables are designed like CAT 5 cables but are insulated for use in systems up to
600 volts. The cables are for two way communication from the controller to the rack/meter modules.
a Some applications will allow for more than 45 poles in one enclosure by adding a second controller. Two controllers can monitor up to 90 poles.
Sm@rtGear™ IE User Manual
The controller also has
a
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