E2 Motor Encoder

Operating Temperature, CPR < 2000

-40 to 100

C

Operating Temperature, CPR ≥ 2000

-25 to 100

C

Electrostatic Discharge, IEC 61000-4-2

± 4

kV

Vibration (10Hz to 2kHz, sinusoidal)

20

G

Shock (6 milliseconds, half-sine)

75

G

Max. Shaft Axial Play

±0.010

in.

Max. Shaft Runout

0.004 T.I.R.

in.

Max. Acceleration

250000

rad/sec²

For CPR ≤ 1250:
Max. RPM (1)
Max. A/B Frequency
e.x. CPR=1250, Max. RPM=14400
e.x. CPR=100, Max. RPM=60000

minimum value of ((18 x 10^6) / CPR) and (60000)
300

RPM
kHz

For CPR = 2000, 2048, 2500:
Max. RPM (1)
Max. A/B Frequency

minimum value of ((21.6 x 10^6) / CPR) and (60000)
360

RPM
kHz

For CPR = 4000, 4096, 5000:
Max. RPM (1)
Max. A/B Frequency

minimum value of ((43.2 x 10^6) / CPR) and (60000)
720

RPM
kHz

Typical Product Weight

0.56

oz.

Codewheel Moment of Inertia

8.0 x 10^-6

oz-in-s²

Hub Set Screw

#4-48

Hex Wrench Size

0.050

in.

Encoder Base plate Thickness

0.135

in.

3 Mounting Screw Size

#0-80

2 Mounting Screw Size

#2-56 or #4-40

3 Screw Bolt Circle Diameter

0.823 ± 0.005

in.

2 Screw Bolt Circle Diameter

0.750 ± 0.005

in.

Required Shaft Length (2)(3)
  With E-option (3)
  With H-option

0.445 to 0.575
0.445 to 0.805
> 0.445

in.
in.
in.

Index Alignment to Hub Set Screw

180 Typical

degrees

Hub Set Screw

2-3

in-lbs

Cover Screw

2-4

in-lbs

Base Mounting Screw (#0-80)

1-2

in-lbs

Base Mounting Screw (#2-56)

2-3

in-lbs

Base Mounting Screw (#4-40)

4-6

in-lbs

Adapter Plate Mounting Surface (#2-56 screws)

2-3

in-lbs

Adapter Plate Mounting Surface (#4-40 screws)

4-6

in-lbs

Supply Voltage

4.5

 5.0

5.5

V

Supply Current

27
54
72

33
62
85

mA
mA
mA

CPR < 500, no load 
CPR ≥ 500 and < 2000, no load
CPR ≥ 2000, no load

Low-level Output

0.25

0.5
0.5

V
V
V

IOL = 8mA max., CPR < 2000
IOL = 5mA max., CPR ≥ 2000
no load, CPR ≥ 2000

High-level Output

2.0
2.0

4.8
3.5

V
V
V
V

IOH = -8mA max. and CPR < 2000
IOH = -5mA max. and CPR ≥ 2000
no load and CPR < 2000
no load and CPR ≥ 2000

Output Current Per Channel

-8
-5

8
5

mA
mA

CPR < 2000
CPR ≥ 2000

Output Rise Time

110
50

nS
nS

CPR < 2000
CPR ≥ 2000, ± 5mA load

Output Fall Time

100
50

nS
nS

CPR < 2000
CPR ≥ 2000, ± 5mA load

1

Ground

2

Index

3

A channel

4

+5VDC power

5

B channel

E2 & H1 Material Change - 7191

8/22/2022

As part of our ongoing continuous improvement program, as well as considering the current state of the plastics industry supply chain disruptions, US Digital has decided to focus on the standardization of our plastic encoder components. Based on this, the E2 and the H1 encoder covers and bases will be changing from PBT 20% GF
(polybutylene terephthalate) to PC 20% GF (polycarbonate). This change has no impact on the form, fit and function of these encoders.

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E2, E5 Packaging - PCN 7190

8/31/2021

As part of our ongoing continuous improvement efforts, US Digital is implementing a change to the individual packaging options of our E2 and E5 kit encoders. It is important to note that this change will not affect the bulk packaging option, also known as our “B” packaging option.

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HUBDISK-1 Packaging Change Notification - PCN 6297

4/30/2018

As part of our ongoing continuous improvement efforts, US Digital is implementing a change to the packaging of our 1-inch Hubdisk assemblies.

We are replacing the current plastic tube packaging with a 25-count plastic tray. The tray is a two-piece design with a snap-on lid and anti-static coated for ESD-sensitive environments. This change is designed to enhance the ease of handling for our customers, easy removal of the individual hubdisk, and protection against potential damage due to long-term storage of hubdisk assemblies.

This change does not affect the form, fit, or function of the final product.

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Hub Set Screw Production Change - PCN 5367

7/20/2015

As part of our ongoing continuous improvement efforts, US Digital is implementing a change related to the production of our 5/16" (.313), 8mm (.315), 3/8" (.375), and 10mm (.394) HUBDISK assemblies. We are adding a low-strength threadlocker to the set screw during our assembly process to assist in securing the set screw in the hub during transportation. This will aid in the set screw retention of these specific hub sizes; ensuring the retention is sufficient and avoid the potential of them backing out of the hub assembly during transit. This change does not affect form, fit, or function.

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E2 Mold Update - PCN 5258

4/22/2015

As part of our ongoing continuous improvement efforts, and in order to enhance both function and appearance of the E2 product line, multiple improvements are being incorporated into a plastic component redesign.

• Download the revised E2 Assembly Instructions

• Download the revised E2 Mechanical Drawing

• Download the revised E2 Mechanical Drawing (options)

• Download the revised 3D models (samples)

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EM1 & EM2 Update - PCN 4199

1/14/2014

Based on our continuous process improvement program, US Digital is changing the current marking method for our EM1 and EM2 encoder modules to a serialization method. This change will allow for each module to have a unique code; the current marking method is based on a date code system that includes all encoder modules produced within a specific week/year. The serialization system will be based on a hexadecimal system.

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EM1 LED Die - PCN 1016

2/7/2013

As part of US Digital's continual assurance of supply strategy, we have qualified additional sources for our LED die used in our EM1 encoder module, which in turn impacts all of the following products:

EM1, E2, E3, E5, E6, H1, H15, H3, H5, H6, HB5M, HB6M, HD25, PE, S1, S2, S5, S6, T5 and T6

The device specification will remain the same, i.e. there will be no change to form, fit, or function of the product(s) as specified by US Digital. The appropriate quality and reliability testing have been performed on representative products to ensure normal parametric distribution, consistent with US Digital's quality and reliability standards.

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