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 sine 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 set point value.
• 1 Opto-isolated output per channel + 3 general opto-isolated outputs.
• 1 Marker / Index /Home /Zero input per channel + 10 general inputs
• Provides the excitation to the encoders.
• Single ended or differential inputs, sinus or square encoder signals.
• PCI bus for PC.
• Driver for WIN98, WIN2000, NT, XP + examples in VB and Visual C.
• User can freeze the latch counters in real time upon sending a hardware pulse or via the software

4 Axis Encoder Interface Card Model EIC-325/PCI.

Introduction

The 4 Axis quadrature Encoder Interface Card was designed to accommodate most of the popular optical encoders available in the market, such as Dr. HEIDENHAIM®, RENISHAW®, HP®, and others.

The board supports either square-wave or sine output encoders, both linear and rotary types.

It can be directly connected to up to 4 encoders and will also provide necessary excitation to the encoders.

The card is equipped with four differential inputs for limit or home switches / marker / encoder index, etc., and 10 more for general use. Also there are four opto-isolated outputs that may be used for set-points, carry, marker, etc., and three outputs for general use.

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: 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 ports.
• Inputs / Outputs: All encoder Inputs (4xSinus, 4xCosin eand 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.
  • 500 Kpps (option for higher rate).
  • Sine 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 poly switch resetable fuse.

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.
  • PCI 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 and drivers for WIN98, WIN2000, NT, XP (OCX and DLL) with full example in VB and Visual C.
• The drivers are constantly updated on our web site.