Elster Solutions REXUA User Manual

Certification Exhibit

FCC ID: QZC-REXUA

IC: 4557A-REXUA

FCC Rule Part: 15.247

IC Radio Standards Specification: RSS-247

ACS Project Number: 15-0285

Manufacturer: Elster Solutions, LLC

Model: REXUA

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

Model REXUA PCBA manual

General

The Model REXUA printed circuit board assembly (PCBA) contains a frequency hopping spread spectrum radio
operating in the 902.4-927.6 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 REXUA module is installed in a plastic housing it
forms a complete electricity meter. Installations of multiple REXUA 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 902.4 - 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
Classification Frequency Hopping Spread Spectrum
Maximum Output Power 1 W
Frequency Band 902.4 - 927.6 MHz
Number of Channels 64
Channel Spacing 400 KHz
Mode NGC
Data Rate 50 kbps, 150 kbps or 200 kbps
20 dB Occupied Bandwidth 100 KHz < BW < 400 KHz for 50/150/200 kbps data rates
99% Occupied Bandwidth 100 KHz < BW < 400 KHz for 50/150/200 kbps data rates
Max channel dwell time < 0.4 seconds within a 20 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.