US Digital

E7P OEM Optical Kit Encoder

Overview

  • Quick simple assembly
  • A and B quadrature TTL outputs
  • Fits shaft diameters from 0.118" (3mm) to 0.394" (10mm)
  • Frequency response DC to 60 kHz
  • 180 to 720 cycles per rev (CPR)
  • 720 to 2880 quadrature states per rev.
  • Accepts .020 axial shaft play
  • 5 V supply

 The E7P quick assembly optical incremental kit encoder is designed for high volume, low cost, mid-resolution OEM motion control applications. The E7P was designed as a big brother to the E4P encoder and offers higher...

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Product Specifications

ParameterDimensionUnits
Moment of Inertia 6.48 x 10-5 oz-in-s2
Required Shaft Length
  With E-Cover option
  With H-Cover option		 0.355 to 0.587
0.355 to 0.836
>=0.355		 in.
in.
in.
Bolt CircleOption to SpecifyScrews Included*Hex Tool Included*
0.750" - low profile #4-40 x 1/4" .050" hex driver
1.280" - low profile #4-40 x 1/4" .050" hex driver
1.280" 2-option standard #2-56 x 1/4" 5/64" hex wrench
1.812" G-option standard #4-40 x 1/4" 3/32" hex wrench

* The set of screws and hex tool included with each encoder depend on the option and bolt circle as shown above.

Although standard socket head cap screws will work when mounting the E7P, to maximize clearance between the codewheel and the top of the screw head, we recommend low profile socket head cap screws when using the holes on the E7P board. Both standard or low profile socket head cap screws will work with the G-option.

0.750" Bolt Circle / Low Profile #4-40 x ":

1.280" Bolt Circle / Low Profile #4-40 x ":

1.280" Bolt Circle / #2-56 x " (2-option):


Provides two #2-56 x " screws in place of two #4-40 x 1/4".

1.812" Bolt Circle / #4-40 x " (G-option):


Provides mounting ears on the base allowing for a 1.812" bolt circle.

t-option_0.gif

Provides a transfer adhesive (with peel-off backing) that may be used when mounting holes are not available. A centering tool is required when using transfer adhesive.

Compact (C-option):


Provides the lowest profile.

Extension in Shaft (E-option):


Provides an extension to the cover allowing for longer shafts of up to 0.836".

Hole in Housing (H-option):


Provides a 0.452" diameter hole to the cover allowing for shafts to pass through.

ParameterMin.Max.Units
Vibration (5 Hz to 2kHz) - 20 G
Shaft Axial Play - ±.020 in.
Off-axis Mounting Tolerance - 0.010 in.
Acceleration - 250,000 rad/sec²
Operating Temperature 0 85 C
Storage Temperature -40 85 C
Relative Humidity - 90 %
ParameterTorque
Base to Mounting Surface Screws 2-3 in.-lbs.
PartMaterial
Base, Cover 20% glass filled polycarbonate
Codewheel Aluminum

A leads B for clockwise shaft rotation, and B leads A for counterclockwise rotation viewed from the cover/label side of the encoder (see the AEDR page).

SpecificationsMin.Typ.Max.UnitsNotes
Supply Current - 21 27 mA
Supply Voltage 4.5 - 5.5 V
High Level Output 2.4 - - V loh = -2 mA
Low Level Output - - 0.4 V lol = 8 mA
Rise Time - 500 - ns Cl = 25 pF, Rl = 2.7 kΩ
Fall Time - 100 - ns
Frequency Response - - 60 kHz

For complete details see the AEDR page.

SpecificationsMin.Typ.Max.UnitsNotes
Supply Current - 22 30 mA
Supply Voltage 4.5 - 5.5 V
High Level Output 2.4 3.4 - V loh = -20 mA
Low Level Output - 0.2 0.4 V lol = 20 mA
Rise Time - 500 - ns
Fall Time - 100 - ns
Frequency Response - - 60 kHz

For complete details see the AEDR page.

ParameterTyp.Max.Units
Symmetry Error 16 75 deg.
Quadrature Error 12 60 deg.

timing_diagram_0.gif

CPR (N):

The number of Cycles Per Revolution.

One Shaft Rotation:

360 mechanical degrees, N cycles.

One Electrical Degree (e):

1/360th of one cycle.

One Cycle (C):

360 electrical degrees (e). Each cycle can be decoded into 1 or 4 codes, referred to as X1 or X4 resolution multiplication.

Symmetry:

A measure of the relationship between (X) and (Y) in electrical degrees, nominally 180e.

Quadrature (Z):

The phase lag or lead between channels A and B in electrical degrees, nominally 90e.

Position Error:

The difference between the actual shaft position and the position indicated by the encoder cycle count.

Cycle Error:

An indication of cycle uniformity. The difference between an observed shaft angle which gives rise to one electrical cycle, and the nominal angular increment of 1/N of a revolution.

Centering Tools (May need to order separately, only included with PKG3-packaging option).

Part #: CTOOL - (Shaft Diameter)

Description: This reusable tool provides a simple method for accurately centering the E7P base to the shaft. It is required when using the T-option.

Spacer Tools (Do not need to order separately, included with ALL packaging options).

Part #: SPACER-E7P

Description: Self-spacing tool for placement of hub. Round. Aluminum.

Screws

Part #: SCREW-2381

Description: 2-56 x 1/4" socket head cap screw

Quantity Required for Mounting: 2 per encoder

Part #: SCREW-9127

Description: 4-40 x 1/4" low profile socket head cap screw

Quantity Required for Mounting: 2 per encoder

Part #: SCREW-2394

Description: 4-40 x 1/4" socket head cap screw

Quantity Required for Mounting: 2 per encoder

4-pin Single-ended6-pin Differential
PinDescriptionPinDescription
1 +5VDC power 1 Ground
2 A channel 2 A channel
3 Ground 3 A- channel
4 B channel 4 +5VDC power
    5 B channel
    6 B- channel

Product Description

Restriction of Hazardous Substances

 The E7P quick assembly optical incremental kit encoder is designed for high volume, low cost, mid-resolution OEM motion control applications. The E7P was designed as a big brother to the E4P encoder and offers higher resolutions, a wider range of shaft diameters, and mounts to additional bolt circles. The E7P uses a 5 V supply and offers two TTL quadrature outputs. A single chip reflective encoder module incorporates an LED, monolithic detector and molded lenses. The phased array technology accepts far wider mechanical tolerance and misalignment than traditional aperture type encoders.

Two screws secure the base using one of three bolt circles. The precision machined aluminum spring-loaded reflective codewheel pushes on by hand using a spacing tool to securely grip the shaft while eliminating set screws. The cover snaps on to complete the assembly in seconds.

When mounting holes are not available, a centering tool and stick-on version is available. The T-option specifies a base with a transfer adhesive pre-applied. The backing is peeled off and the base is slid down the shaft guided by the centering tool.

The single-ended output version has a 4-pin connector and is designed to drive cables up to six feet long.

The differential output version has a 6-pin connector and is designed for driving longer cable lengths and maximizes noise immunity. The internal 26C31 differential line driver can source and sink 20 mA at TTL levels. The recommended receiver is industry standard 26C32. Maximum noise immunity is achieved when the differential receiver is terminated with a 110 Ω resistor in series with a .0047 μF capacitor placed across each differential pair. The capacitor simply conserves power. Otherwise power consumption would increase by approximately 20 mA per pair, or 40 mA for 2 pairs.

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.
Related Documentation

Purchasing

Configure and Purchase

1. CPR
2. Bore
3. Output


4. Cover




5. Base




6. Packaging




Product Part Number
Quantity Price
1 $43.50
10 $31.28
50 $24.32
100 $20.06
Over 100 Call for quote
Quantity
Unit Price

$43.50

Subtotal

$43.50

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

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