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US Digital

EDAC2 Encoder Digital to Analog Converter

Overview

  • Converts any incremental encoder into an analog position sensor
  • 12 bit analog resolution
  • 0 to 4.095V or 0 to 10V unipolar output voltage operation
  • ± 4.095 or ± 10V bipolar output voltage operation
  • Reset can be configured to zero or mid-range voltage
  • Simple DIP switch defined programming
  • DIN rail mounting is available
  • TTL logic level output bit to indicate direction of rotation or linear movement

The EDAC2 converts the A and B quadrature output of an incremental...

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Product Specifications

Unless otherwise specified, all accuracy measurements assume operation within temperature range 0C to 70C.

ParameterMin.Typ.Max.UnitsNotes
Voltage Out to Encoder 4.8 5.0 5.2 Volts Under 100mA load
Input Supply Voltage 12 -
 16 Volts
Supply Current -
-		 110
255		 -
-		 mA
mA		 12V input, no encoder load
12V input, 250mA encoder load
Full Scale Output Error - Analog Output -0.5
-1.5		 0.25
±0.25		 0.5
1.5		 % full scale
% full scale		 0 - 4.095V output range
0 - 10V output range
Integral Non-linearity Error - Analog Output -3.0
-8.0		 ±1.0
±3.0		 3.0
8.0		 mV
mV		 0 - 4.095V output range
0 - 10V output range
Offset Error - Analog Output -6.0
-6.0		 ±1.0
±1.0		 6.0
6.0		 mV
mV		 0 - 4.095V output range
0 - 10V output range
Quadrature Encoder Inputs*
   Logic Low
   Logic High
0
2.0
0.4
5.0
0.8
5.75
Volts
Volts
Direction Bit Output
   Logic Low
   Logic High
-
2.4
-
-
0.4
-
Volts
Volts
8mA (sinking current)
-4mA (sourching current)
Analog Output Load Impedance 2000 - - Ohms

* Diode clamped to ground and +5V, 5kΩ pullup to +5V.

ParameterMin.Typ.Max.Units
Operating Temperature 0 - 70 C
Encoder Current* 0 - 250 mA
Quadrature Input Frequency 0 - 400 kHz

* +5VDC power for external encoder.

The EDAC2 is programmed by eight DIP switches in either an up or down position.

SwitchNameUp ↑Down ↓  Explanation
0 Not Used - - -
1 Reset Mid-range Zero Reset voltage level
2 Range Limit Range Limit Rollover Sets counting mode
3 Count Multiplier 1X 4X Enables quadrature counting
4 Analog Voltage 4.095V 10V Sets full scale output voltage
5 Reverse A / B B / A Swaps increasing count direction
6 Index Reset No Reset Ignores the index or resets on index
7 Output Mode Unipolar Bipolar 0 to +VDC or ±VDC output

Encoder Input:

PinDescription
1 Ground
2 Index
3 A channel
4 +5VDC power
5 B channel

Analog Output:

PinDescription
1 Ground
2 +VDC output
3 Direction

Power Input:

PinDescription
Center 13 to 16VDC
Outer Barrel Ground

Product Description

The EDAC2 converts the A and B quadrature output of an incremental encoder into a voltage that is proportional to the encoder position. The output from the encoder causes an internal 12-bit counter to count up or down. The output of the counter is fed into a 12-bit DAC that converts the 12-bit position count value to an analog voltage.

Eight DIP switches are provided to select various options. The user can choose unipolar output mode with 0 to 4.095V or 0 to 10V output, bipolar output mode with ±4.095V or ±10V output, 1X or 4X counting, reset on index, reverse rotation, midrange reset and range limit counting. Full scale output in 10V mode is actually 9.962V.

The EDAC2 has an internal counter that may be reset in one of three ways: by pressing the reset button, power cycling the unit or enabling the reset on encoder index. The reset may be configured to either mid-range or zero volts.

The EDAC2 also provides a TTL logic level output bit, which changes state to indicate direction of a rotary encoder shaft rotation or linear encoder direction of travel.

Power for the EDAC2 is provided by an external power supply which also provides +5VDC to an external encoder through the encoder input connector. A three position screw terminal block provides the analog output connections and logic level direction bit output.

Product Notes
  • Cables and connectors are not included and must be ordered separately.
  • US Digital warrants its products against defects in materials and workmanship for two years. See complete warranty for details.
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Purchasing

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Product Part Number
Quantity Price
1 $123.95
10 $96.55
50 $87.15
100 $82.00
Over 100 Call for quote
Quantity
Unit Price

$123.95

Subtotal

$123.95

For your convenience, use the above part number to order via phone 800.736.0194

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