Figure 5: Operate (OPR) Contactor and Reset Relay (RST) Wiring
5.2.9 Attenuator
An attenuator reduces the incoming signal levels from the controller. This has the effect of reducing the range at
which the machine may be controlled. Using an attenuator also makes the receiver less susceptible to
overloading and distortion caused by strong signals on other adjacent channels. All MP Series receiver/decoders
can use an external attenuator where varying levels of attenuation can be selected from a range of attenuators.
To obtain an external attenuator for your receiver/decoder, contact Cattron at www.cattron.com/contact.
Note: If your PRC is provided with the Model R2HN receiver which has a built-in attenuator, refer to Appendix
I – R2HN Receiver of this manual.
5.3 Installation
5.3.1 Getting Started
As previously instructed, study the customized schematic drawings for your installation. If there are any questions
concerning the drawings or installation requirements, contact Cattron at www.cattron.com/contact before
proceeding. If any additions or corrections are made during the installation, note the changes on the drawings in
red ink. Return the marked-up drawings to Cattron after the installation so that final prints may be prepared and
issued.
5.3.2 Choosing a Mounting Location
When selecting a location to install the receiver/decoder, there are a few items to consider. The receiver/decoder
must be installed in a location that allows easy access for maintenance and service. Adequate clearance must be
allowed to open the door for access. The location must also provide adequate RF reception.
Select a location to minimize any possible interference from RF sources such as motors. Ideally, the
receiver/decoder should be installed as close as practical to the controlled machine’s electrical cabinet.
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