The EIC-325 – a half-size PC card – was designed to accommodate the most popular industry standard optical encoders available in the market. It supports encoders with either square-wave or sinus output. As with all of our other PC add-on products, it was designed for industrial purposes and the most requested features are built on the board.

Main Features

• Four 24 bit up/down latch counters.
• Each counter can be programmable for preset value.
• Four opto-isolated outputs which can be used for set-points, carry or index/marker and three outputs for general use.
• Four differential inputs for connection of encoder's Index or limit switches and 11 single ended inputs for general use.
• Internal status register for rapid storing and clearing signals.
• Same board fits square-wave or sinus encoders.

Specification

Number of encoders: 2/4 per board.

• Multiple encoder pulses: 1, 2 or 4 (software selectable).
• Encoder type: Sinus or square wave types.
• Counters size: 24 bit up/down with latched buffer.
• Method of communication with PC bus: I/O addressing (16 addresses to select from).
• Inputs / Outputs: All encoder Inputs (4xSinus, 4xCosinus and 4xIndex) are differential.
• All general purpose inputs are TTL/CMOS compatible schmith trigger single ended.
• All outputs are opto-isolated.

Encoder Signals Specifications

• Square wave signal.
  • Square wave A phase and B phase shifted by 90°, single-ended or differential.
  • HTL 0.5-5v or TTL compatible.
  • 800 KHz max. quadrature rate.
  • Sinus wave signal:
    • Two incremental sinusoidal signals (Phase A and B Shifted by 90°).
  • Signal range:
  • Load:
    • 10 Kohm.
    • Current output encoders: 50 mA.
    • Voltage output encoders: 500 mV for Phases A,B and for the reference marker/ index pulse.
  • Excitation to the encoders: 5Vdc.
  • Light source current: max. 900 mA total. Protected by a polyswitch resetable fuse.
  • Max. frequency input: 600 KHz.

Encoder Counter Features

• 24 bit up/down counter + 24 bit latched buffer per counter.
• Independent programmable set-point for each counter.
• User may freeze the buffers without stopping the counters from counting.
• Independent operation mode for each axis.
  • Single / multiple encoder pulses.
  • Reset counter when index reached / by software.
• Independent selectable output options for each encoder:
  • Set-point reached.
  • Counter carry flag.
  • Index/Marker
• Independent selectable interrupts options for each axis:
  • Set-point reached.
  • Counters carry flag.
  • Index/Marker.
• General:
• Power:
  • +5V: 200mA max.
  • +12V: 100mA max.
  • -12V: 50mA max.
  • All supplied from ISA/PC-104 bus.
• Connectors
  • Encoders: Mini DIP 44 pin.
  • Outputs: DIP 9 pin.
  • PC-104 (option).
  • ISA edge connector.
• Environmental .
  • Operating temperature: 0-50° C (32-122° F).
  • Humidity: up to 80% non-condensing.
• Board dimensions - Half size PC card.
• Software included.
• A package to utilize the PC as a 4-axis sophisticated counter.
• Examples and source code on how to communicate with the board under DOS and drivers for WIN95/98 with full example in VB.
• Constantly updated on our web page.