Aclara Power-Line Systems Inc. Y72553-1 Manual Do Utilizador

T W A C S

- O R I O N

f o r U M T P r o d u c t s U s e r G u i d e

System Overview

Electric Meter Transceiver (EMTR-3)

The EMTR-3 is an electronic module assembly (EMA) that is installed in a

TWACS-enabled meter. The EMTR-3 is connected to the UMT transponder

during meter/transponder integration. The EMTR-3 adds functionality to the host

UMT. It does not communicate over the power line but provides data on-command

to the UMT when queried.

The EMTR-3 can communicate with up to seven ORION

transmitters. Data from

the ORION

transmitter is relayed to the EMTR-3 at each communication session.

This data is relayed upon request to the UMT via I

C communication and is

accessed by the TNS across the TWACS network.

The EMTR-3 listens (for 2.5 seconds) for communication from an ORION

transmitter. Then, for 2.5 seconds the EMTR-3 listens for an HHTR-3. This pattern

cycles continuously.

Figure 2.2

Electric Meter Transceiver (EMTR-3)

EGULATORY

ATA

This equipment has been tested and found to comply with the limits for a Class

B digital device, pursuant to Part 15 of the FCC Rules. These limits are

designed to provide reasonable protection against harmful interference in a

residential installation. This equipment generates, uses and can radiate radio

frequency energy and, if not installed and used in accordance with the

instructions, may cause harmful interference to radio communications.

However, there is no guaranteee that interference will not occur in a

particular installation. If this equipment does cause harmful interference to

radio or television reception, which can be determined by turning the

equipment off and on, the user is encouraged to try to correct the

interference by one or more of the following measures: reorient or reloact the

receiving antenna, increase the separation between the equipment and

receiver, connect the equipment into an output on a circuit different from

that to which the receiver is connected, consult the dealer or an experience

radio/TV technician for help.

Operation is subject to the following two conditions: (1) This device may not

cause harmful interference. and (2) this device must accept any interference

received, including interference that may cause undesired operation.

DRAFT