Elster Solutions REXUAI User Manual

Certification Exhibit

FCC ID: QZC-REXUAI
FCC Rule Part: 15.247

ACS Project Number: 15-0285

Manufacturer: Elster Solutions, LLC

Model: REXUAI

5015 B.U. Bowman Drive Buford, GA 30518 USA Voice: 770-831-8048 Fax: [phone]

Model REXUAI PCBA manual

General

The Model REXUAI printed circuit board assembly (PCBA) contains a frequency hopping spread spectrum radio
operating in the 916.0-927.6 MHz ISM frequency band plus a DSSS radio operating in the 2.4 GHz ISM band.
It also contains circuitry for electricity metering. When the REXUAI module is installed in a plastic housing it
forms a complete electricity meter. Installations of multiple REXUAI meters comprise part of an Advanced
Metering Infrastructure (AMI) system that utilizes a proprietary network architecture and protocol devised by
Elster Solutions.

Device specifications

Table 1: 900 MHz Radio Specifications

Classification Frequency Hopping Spread Spectrum
Maximum Output Power 250 mW
Frequency Band 916.0 - 927.6 MHz
Number of Channels 25
Channel Spacing 400 kHz
Mode EA LAN1
Data Rate 35.5 kbps
20 dB Occupied Bandwidth 250 KHz < BW < 400 KHz
99% Occupied Bandwidth 250 KHz < BW < 400 KHz
Max channel dwell time < 0.4 seconds within a 10 second period

EA LAN2
142 kbps
250 KHz < BW < 400 KHz
250 KHz < BW < 400 KHz

Table 2: 2.4 GHz Radio Specifications

Classification Digital Modulation
Maximum Output Power 100 mW
Frequency Band 2405 - 2470 MHz
Number of Channels 14
Channel Spacing 5 MHz
Mode ZigBee
Data Rate 250 kbps
6 dB Occupied Bandwidth 1.613 MHz
99% Occupied Bandwidth 2.44 MHz

FCC and Industry Canada Compliance

The radio module is manufactured directly onto the meter main circuit board, and the module is inserted into
the electronic housing of the meter at manufacture. It has no user-serviceable parts.

USER INFORMATION (PART 15.105)

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 guarantee 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: