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What Kind Of Signals Are You Sending?
Electrical noise is unwanted current or voltage in an electrical device or system. This noise can have a significant effect on applications requiring the communication of data via electrical wiring. Simply put, it messes up your encoder signal, and can give your controller or counter incorrect information.
Common environments that creates noise are:
• Having a long cable run on your encoder
• Not having the proper termination for your output signal
• Differing voltages of your input and output device
The original versions of the RXTX included a Repeater and a Converter. The RXTX Repeater helps to transmit (or repeat) the signal over long distances, or long cable runs. It also properly terminates differential signals to reduce signal distortion. Differential signals are A, A’, B, B’, Z, Z’. Single ended signals are just A, B, Z.
Although the preferred choice for transmitting encoder signals is using differential pairs, many older or even some current PLCs or controllers may require single ended inputs such as push-pull, open collector, or pull-up. Quite often a mix of signal requirements is needed in one application. The RXTX Converter will convert single ended output signals to differential line driver, or convert differential line driver signals to single ended.
The newest version of the RXTX is called the Splitter, allowing one signal to be “split” and sent to multiple devices. The RXTX Splitter has one input channel, and two output channels. Using one single ended or one differential input signal, it will produce two differential outputs.
RXTX - Repeater/Converter/Spiltter
We understand that this subject matter can be confusing, and is application specific, so please don’t hesitate asking for assistance when specifying the correct RXTX for your application.
All RXTX data sheets (Splitter, Converter, and Repeater) can be found at www.encoder.com in the “Accessories” section.
[PRINTER FRIENDLY VERSION]
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