OM-CP-RF Series Operations Manual
Omega Engineering, Inc.
Revised 04/07/05
Page 12 of 18
Figure 5. RFExtender as a wireless communication interface
In either configuration, the RFExtender functions like an extension cable between the
logger interface and the PC. The primary difference between the two setups is the logger
interface that is connected to the RFExtender. Figure 4 uses an RFC101A, and is therefore
limited by the one-way communication between the OM-CP-RF data logger and the
RFC101A. Just like using the RFC101A by itself, this setup requires that the logger be
brought back to the PC and connected to an IFC110 interface cable to launch, download, or
configure the logger. Figure 5 allows two-way communication through the IFC110 and thus
can allow full use of the data logger features.
The setup in Figure 4 is necessary when several transmitters must send their data to the
same RFExtender. The data is received by the RFC101A, and retransmitted or “repeated” to
the PC. Figure 5 is appropriate when only one data logger needs to be used with a particular
RFExtender. The data logger is configured to transmit data packets over the serial cable
instead of through the wireless transmitter, and the RFExtender transmits the serial data
back to the PC. This setup has two advantages: the logger can be launched, downloaded,
and configured without bringing it back to the PC, and the IFC110 interface cable is less
expensive than the RFC101A.
Complex RFExtender System
It is possible to use more than two RFExtenders in a system with more than two nodes.
This type of setup will be an extension of the two simple setups demonstrated above. Refer
to Figure 6 for an example of a complex system.
The setup in Figure 6 shows an RFExtender connected to a PC that can receive data from
8 other transceivers. Each of the remote transceivers can either communicate serially with
one logger via an IFC110 or receive wireless data from multiple OM-CP-RF series
transmitters through an RFC101A. For this system to function properly, each transceiver
must be set up to receive data only from the proper location. This is accomplished by
assigning each transceiver a unique module address to identify itself, and a receiver address
mask to identify the module addresses from which it will receive data.
Module Address and Receiver Address Mask
The module address provides a unique identification of the individual transceivers. It
consists of 4 hexadecimal digits, which can be divided between a “system number” and a
Summary of Contents for OM-CP-RF Series
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