COOPER INDUSTRIES INC FHOEM-900 Manuale Utente
USER MANUAL
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1.
FEATURES AND SPECIFICATIONS
1.1 Description
The OEM-900 is a credit card sized, board-level 902-928 MHz radio platform specifically designed for industrial
applications. Capable of accepting a wide range of input voltages, and able to operate across a broad temperature
range, this radio's strength lies in its ability to withstand ISM band interference while ensuring the integrity of each
data packet. This is accomplished via the OMNEX Iris data protocol that uses ARQ and Auto-Routing to move data
accurately in hostile RF conditions. While supporting transparent data communications as well as MODBUS RTU
and AB DF1 packet communications, the Auto-Routing feature allows the OEM-900 to build routing tables using
Allen-Bradley and MODBUS addresses. This feature enables the radio to further ‘assure’ communications between
PLC’s and devices in a system for both inbound and outbound messages. Each unit is also capable of acting as a
master, a slave and/or a store-and-forward repeater/slave.
applications. Capable of accepting a wide range of input voltages, and able to operate across a broad temperature
range, this radio's strength lies in its ability to withstand ISM band interference while ensuring the integrity of each
data packet. This is accomplished via the OMNEX Iris data protocol that uses ARQ and Auto-Routing to move data
accurately in hostile RF conditions. While supporting transparent data communications as well as MODBUS RTU
and AB DF1 packet communications, the Auto-Routing feature allows the OEM-900 to build routing tables using
Allen-Bradley and MODBUS addresses. This feature enables the radio to further ‘assure’ communications between
PLC’s and devices in a system for both inbound and outbound messages. Each unit is also capable of acting as a
master, a slave and/or a store-and-forward repeater/slave.
1.2 HopLink Features
1.2.1 HopLink Technology
OMNEX HopLink devices employ frequency hopping spread spectrum technology to provide optimum performance
under present FCC and ISC regulations. These devices are virtually immune to interference since they provide the
interference and range benefits of a narrow band receiver while utilizing the entire 902 - 928 MHz band. The radio
frequency hop pattern is pseudo random in nature and each transmission is 37 mSec in duration, after which it sits in
the receive mode for 37 mSec waiting for a response. The hop sequence repeats approximately every 2.3 sec.
under present FCC and ISC regulations. These devices are virtually immune to interference since they provide the
interference and range benefits of a narrow band receiver while utilizing the entire 902 - 928 MHz band. The radio
frequency hop pattern is pseudo random in nature and each transmission is 37 mSec in duration, after which it sits in
the receive mode for 37 mSec waiting for a response. The hop sequence repeats approximately every 2.3 sec.
OMNEX devices are designed to operate specifically in the 902-928 MHz band. Many manufacturers have
designed their ISM band equipment to operate in an ideal environment that the unlicensed bands are not. The
OMNEX radios are designed to co-exist with all other radios legally allowed to operate in these bands and will
generally outperform most other systems presently available.
designed their ISM band equipment to operate in an ideal environment that the unlicensed bands are not. The
OMNEX radios are designed to co-exist with all other radios legally allowed to operate in these bands and will
generally outperform most other systems presently available.
Special hopping sequence codes allow systems to co-exist with no overlap in frequencies. Many more units can co-
exist in one location with only a slight penalty in response time.
exist in one location with only a slight penalty in response time.
1.2.2 HopLink Data Integrity
HopLink products are designed for industrial applications. Every effort has been made to ensure that data over the
link is secure and fail-safe. In addition to CRC-16 error checking, a number of self-checking features have been
implemented. A special output on all HopLink Transceivers (LINK) indicates the status of the radio link and
provides a fail-safe means of shutting down remote equipment in case of a failure in the link
link is secure and fail-safe. In addition to CRC-16 error checking, a number of self-checking features have been
implemented. A special output on all HopLink Transceivers (LINK) indicates the status of the radio link and
provides a fail-safe means of shutting down remote equipment in case of a failure in the link
1.2.3 HopLink Family
The HopLink telemetry product line (TEX-900, REX-900, HS-900, and DX-900MA) includes both simplex and
duplex products incorporating a flexible array of Input and Output options. In addition, OMNEX provides packaged
remote control products for controlling overhead cranes, conveyers and other construction equipment.
duplex products incorporating a flexible array of Input and Output options. In addition, OMNEX provides packaged
remote control products for controlling overhead cranes, conveyers and other construction equipment.