Itron Inc. FNCCU4 Manual Do Utilizador
DRAFT
4
CCU4 Collector Field Installation and Service Guide
TDC-0359-000b 04/02
TDC-0359-000b 04/02
CCU4 Collector Components
Upper Housing
The upper housing contains the public network interface modem and the external power and
communications connectors. Each collector contains either a CDPD modem or a POTS (Plain
Old Telephone Service) dial-up modem, but not both at the same time. The upper housing can be
replaced to change the method of public network access.
communications connectors. Each collector contains either a CDPD modem or a POTS (Plain
Old Telephone Service) dial-up modem, but not both at the same time. The upper housing can be
replaced to change the method of public network access.
CDPD Modem
The CDPD modem provides switched data communication services between the collector and the
service providers internet connection/frame relay. CDPD communication provides two-way,
fully digital, 19.2 KBPS packet data networking services. Due to protocol overhead and security,
the effective data rate for CDPD is between 9 KBPS and 14 KBPS, and will drop during periods
of interference and high network utilization. The antenna for the CDPD modem is integrated into
the top cover of the collector. CDPD service is offered by major cellular vendors in most
metropolitan areas of North America.
service providers internet connection/frame relay. CDPD communication provides two-way,
fully digital, 19.2 KBPS packet data networking services. Due to protocol overhead and security,
the effective data rate for CDPD is between 9 KBPS and 14 KBPS, and will drop during periods
of interference and high network utilization. The antenna for the CDPD modem is integrated into
the top cover of the collector. CDPD service is offered by major cellular vendors in most
metropolitan areas of North America.
POTS Modem
The POTS modem is a dial-up modem operating at up to 56 KBPS. Electrical connection to the
modem is through the same modem interface board as used by the CDPD modem. The modem
is a transformer coupled device, which maintains the electrical isolation of the collector. Dial-up
internet service is offered by Internet Service Providers (ISPs) in most areas of North America.
modem is through the same modem interface board as used by the CDPD modem. The modem
is a transformer coupled device, which maintains the electrical isolation of the collector. Dial-up
internet service is offered by Internet Service Providers (ISPs) in most areas of North America.
Communications Connector
The communications connector is a transformer coupled connection (maintaining electrical
isolation) and is used on POTS versions of the collector to transmit data to the headend and
download software through POTS lines. The same connector is used in the meter shop to
establish an Ethernet connection, using different pins, during initial configuration and software
download.
isolation) and is used on POTS versions of the collector to transmit data to the headend and
download software through POTS lines. The same connector is used in the meter shop to
establish an Ethernet connection, using different pins, during initial configuration and software
download.
Power Connector
The collector input AC connector is a five position circular 3A/300V connector. Pins 2, 3 and 4
are voided for high voltage line to line clearance. The five position circular connector is mounted
on the collector housing, providing a watertight connection point for external power sources.
are voided for high voltage line to line clearance. The five position circular connector is mounted
on the collector housing, providing a watertight connection point for external power sources.
Central Housing
The central housing is where the main processor, the compact flash memory, and the power
supply reside. The housing is well shielded to prevent interference with the sensitive radio
section.
supply reside. The housing is well shielded to prevent interference with the sensitive radio
section.
Beneath the processor section, in the lower portion of the central housing, are the radio
transmitter and receiver.
transmitter and receiver.