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.
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.
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°).
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:
Counter carry flag.
Independent selectable interrupts options for each axis:
Counters carry flag.
+5V: 200mA max.
+12V: 100mA max.
-12V: 50mA max.
All supplied from ISA/PC-104 bus.
Encoders: Mini DIP 44 pin.
Outputs: DIP 9 pin.
ISA edge connector.
Operating temperature: 0-50° C (32-122° F).
Humidity: up to 80% non-condensing.
Board dimensions - Half size PC card.
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.