Phidgets Encoder High Speed 4-Input (1047)

Part Number: 1047

The PhidgetEncoder Highspeed 4-Input can be used with a wide assortment of mechanical and optical encoders. The encoder should be of quadrature output type, indicating that there will be two quadrature output channels (usually labeled A and B) and an optional third output channel to signal when the index pin (a reference point for zero position or a complete revolution) has been reached.

Product Features:

Reads up to 4 encoders simultaneously.
Time Resolution of 1 μs.
Includes 4 Digital Inputs for detecting the state of switches and sensors.
Connects directly to a USB port on your PC.

The PhidgetEncoder Highspeed 4-Input is able to read four encoders simultaneously. Encoders are not powered up until all initialization of the device is complete. It is possible to enable some or all encoders, depending on how many of the channels are being used. This can also be used to reduce power consumption when certain encoders are not needed.
The PhidgetEncoder Highspeed 4-Input has the added ability to time the duration between a group of quadrature changes. The time is returned in microseconds. This time value can be used to calculate velocity and acceleration.
Both mechanical and optical encoders are available, with optical encoders dominating at > 100 counts per second. Review the data sheet for the encoder you are planning to use to ensure it is compatible with the PhidgetEncoder Highspeed 4-Input. Almost any incremental quadrature encoder will work but it is important to verify this before connecting it to the Phidget. Absolute encoders will not work with this device. Ideally, you should choose a quadrature encoder with a 5-pin output and the following pinout in order to be directly compatible with the 1047.

Product Specifications: Encoder:

Maximum Count Rate: 250,000 counts/second
Internal Output Pull-Up Resistance: 10 kilo Ohms
Software Update Rate (typical): 8 ms
USB Update Rate: 125 samples/second
Time Resolution: 1 μs

Current:

Max Device Current Consumption (all channels enabled): 500 mA
Min Device Current Consumption (all channels disabled): 30 mA
Maximum Current Consumption per Encoder: 200 mA
Maximum Current Consumption for all Encoders: 470 mA

Voltage:

Min/Max USB Supply Voltage: 4.75 - 5.35 VDC
Encoder Input Low Voltage: 1.4 V
Encoder Input High Voltage: > 1/8 V

Board:

Operating Temperature: 0 - 70C

Additional Links:
User Manual
Digital Input Primer
Encoder Primer
Programming Resources