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EI-300 Encoder Interface System
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| The EI-300 Series of optical encoder interface boards provide the industrial equipment designer with a comprehensive yet simple set of modules to interface virtually any optical encoder with the user’s equipment. Most of the features found on the interface boards can be field configured. This allows most design decisions to be deferred until the encoder is installed.
Most installations begin by selecting the EI-301 to interface to the encoder and customer’s equipment. Other modules are then selected to provide the desired result. Interconnection between all the EI-300 Series boards is established with ribbon cables. For example, if the EI-301 is used with the EI-309 14-Bit Analog Output Board, then an incremental encoder output signal will be converted to an analog voltage representing either rate or position. Boards of the EI-300 Series can be mounted side-by-side or stacked on standoffs. They can also be mounted on industrial standard DIN rails. Connection to customer wiring is accomplished with screw terminal blocks. Although not part of the EI-300 series, a stand-alone Backstep Filter board BF-1D was developed to filter out any backward encoder movement signals going to the motion control equipment. |
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EI-301 Input/Output Board
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| This board is the basic building block of the EI-300 Series. It will accept 4 inputs (differential or single ended from 5V to 18V). Three of these inputs are normally from the encoder (A,B,Z) and the forth input (X) is from the customer's circuit. All input voltages are converted to 5V TTL levels for use by other EI-300 boards attached to the I/O board. The EI-301 also has 4 outputs (differential or single ended, open collector, resistor pull-up or active pull-up 5V to 24V). These outputs are controlled by other boards in the EI-300 Series. In certain applications where the customer desires to convert the encoder's output voltage, the EI-301's inputs can be jumpered across to the output drivers directly. Most of the input and output configurations can be changed in the field. There are also on-board voltage regulators to provide a source of regulated 5 volts for use by electrical components on the EI-300 series boards. | ||||||
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EI-309 14-Bit Analog Output Board
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| This board accepts quadrature input signals from an EI-301 and converts them to an analog output signal that can represents either the rotational position of the encoder or the velocity and direction that the encoder shaft is turning. The resolution is 14 bits and the output can be either +5V, +10V, ± 5V, ± 10V, or 4-20 ma. Output range can be scaled to match customer requirements. | ||||||
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EI-317 Programmable Logic Interface Board
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| This board is used for high speed translation of encoder signals to special output formats. One of the major implementations of this board is encoder count translation. For example, a high count per revolution encoder input signal can be converted to a smaller count per revolution output signal, or to a different output format. | ||||||
