E4T Miniature Optical Kit Encoder

E4T Features

Push-on hub - spring loaded collet design
Minimum shaft length of .275 in.
Fits shaft diameters of .079 in. to .250 in.
100 to 1,000 cycles per revolution (CPR)
400 to 4,000 pulses per revolution (PPR)
Single +5V supply

See more info below

Configure the E4T

E4T Product Description

The E4T miniature transmissive optical encoder is designed to provide digital quadrature encoder feedback for high volume, limited space applications. The E4T is designed to be a drop-in replacement for the E4P and offers higher maximum speed and increased output drive. The E4T utilizes an innovative, push-on encoder disk that accepts shaft diameters of 2.0mm to .250 in.

The single-ended output version is connected using a 4-conductor, high retention, polarized, 1.25mm pitch connector. The differential output version uses a similar 6-pin connector. Mating cables and connectors (see the Cables/Connectors web page) are not included and are available separately.

Please Note: Due to the E4T's push-on hub design, it is recommended for use as a one-time installation.

Product Specifications

Environmental

PARAMETER	VALUE	UNITS
Operating Temperature	-20 to 100	C
Electrostatic Discharge, IEC 61000-4-2 Single-ended (-S option) Differential (-D option)	± 12 ± 7	kV
Vibration (10Hz to 2kHz, sinusoidal)	20	G
Shock (6 milliseconds, half-sine)	75	G

Mechanical

PARAMETER	VALUE	UNITS
Max. Shaft Axial Play	± .010	in.
Max. Shaft Runout (TIR)	.002	in.
Max. Acceleration	250,000	rad/sec²
Maximum RPM (1) Maximum A/B Frequency e.x. CPR = 200, Max. RPM = 30000	minimum value of ((6 x 10^6)/CPR) and (60000) 100	RPM kHz
Max. Codewheel Moment of Inertia	5.1 x 10^-7	oz-in-s²
Mounting Screw Size Default (D-option base) Metric (M-option base)	#3-48 x 3/16" M2.5, length 4mm
Screw Bolt Circle Diameter	.586 ±.005	in.
Minimum Shaft Length (2)	.275	in.
Maximum Shaft Length (2)	.395 (D option) / no limit (H option)	in.
Mounting Screw Torque	2-3	in-lbs
Technical Bulletin TB1001 - Shaft and Bore Tolerances		Download

(1) 60000 RPM is the maximum rpm due to mechanical considerations. The maximum RPM due to the module's maximum frequency response is dependent upon the module’s resolution (CPR).

(2) Including axial play.

Single-Ended Electrical

SPECIFICATIONS	MIN.	TYP.	MAX.	UNITS	NOTES
Supply Voltage	4.5	5.0	5.5	V
Supply Current		25	30	mA	CPR ≤ 500, no load
Supply Current		34	42	mA	CPR > 500, no load
Low-level Output			0.4	V	CPR ≤ 500, I_OL= 8 mA
			0.4	V	CPR > 500, I_OL= 5 mA
		0.035		V	no load
High-level Output	2.4			V	CPR ≤ 500, I_OH= -8 mA
	2.4			V	CPR > 500, I_OH= -5 mA
		4.0		V	no load
Output Rise Time		100		ns	no load
Output Fall Time		50		ns	no load

Differential Electrical

SPECIFICATIONS	MIN.	TYP.	MAX.	UNITS	NOTES
Supply Voltage	4.5	5.0	5.5	V
Supply Current		27	32	mA	CPR ≤ 500, no load
Supply Current		36	44	mA	CPR > 500, no load
Single-Ended Output Voltage High	4.75	5.0		V	Min. @ 25mA load, Typ. @ no load
Single-Ended Output Voltage Low		0.25	0.60	V	Typ. @ no load, Max. @ 4.5mA load
Differential Output Voltage	3.0	3.8		V	RL = 100 ohm
Differential Output Rise/Fall Time			20	ns

Phase Relationship

PARAMETER	MIN.	TYP.	MAX.	UNITS
Symmetry, S	105	180	255	electrical degrees
Quadrature Delay, Q	30	90	150	electrical degrees

(1) A leads B for clockwise shaft rotation, B leads A for counter clockwise shaft rotation viewed from the cover side of the encoder.

(2) Typical values represent the encoder performance at typical mounting alignment, whereas the maximum values represent the encoder performance across the range of recommended mounting tolerance.

Pin-Out

4-PIN SINGLE-ENDED (1)		6-PIN DIFFERENTIAL (2)
Pin	Description	Pin	Description
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

(1) 4-pin single-ended mating connector is CON-MIC4
(2) 6-pin differential mating connector is CON-MIC6

Options

Accessories

1. Centering Tool*

Part #: MCTOOL - (Shaft Diameter)
Description: This reusable tool is used to accurately center the E4T base on the shaft.

2. Spacer Tool*

Part #: SPACER-E4T
Description: This reusable tool is used to properly space the codewheel from the encoder.

*Both the MCTOOL and SPACER-E4T tools are included with all packaging options.

3. Screws

Part #: SCREW-348-188-PH
Description: Pan Head, Philips #3-48 UNC x 3/16"
Use: Base Mounting
Quantity Required: 2
Screws are included with default base option

Part #: SCREW-M25-4MM-BH
Description: Button Head Cap, M2.5 x 0.45 x 4mm
Use: Base Mounting
Quantity Required: 2
Screws are included with metric base option

Product Change Notifications

Title	Date	Description	Download
E4T and S4T Cover and Base Update - PCN 7192	3/3/2022	As part of our ongoing continuous improvement efforts, and to avoid any potential disruption to our supply chain, US Digital has decided to standardize our plastic material. Based on this, the E4T and S4T encoder cover and base will change from PBT (Polybutylene Terephthalate) to PC (polycarbonate).	Download
E4T, E8T Packaging - PCN 7195	2/15/2022	As part of our ongoing continuous improvement efforts, US Digital is implementing a change to our packaging options for our E4T and E8T kit encoders.	Download
Updated PCB for E4T and S4T - PCN 6466	1/29/2018	This notice is to inform our customers of a PCB design change that is being implemented for all of the E4T and S4T product lines. The new PCBs will improve overall product performance and enhance robustness of these product lines. The new PCBs can be identified by their blue color (instead of black) and have two mounting holes that mate with the base plate instead of one hole and one slot. This change has no impact on form, fit or function for either the E4T or S4T.	Download
E4T, S4T and E8T Laser Markings - PCN 6227	8/8/2017	This notification is to inform our customers of a change to product markings for the E4T, E8T, and S4T series of encoders. The new marking will be utilized across all three product lines. We are making this change to improve readability for our customers and to provide consistency across the product lines.	Download

Additional Information

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.

3D Model Downloads

Please configure your product first to download a 3D model.
(Note: The formats below will become links if there are 3D models available.)

SolidWorks Format
IGES Format
Parasolid Format
STEP Format

Product Configurator

For pricing, this product requires configuration.

Begin by completing either Option 1 or 2 below. Questions? Contact our support team.

Option 1: Configure the Product

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E4T Miniature Optical Kit Encoder

E4T Features

E4T Product Description

Product Specifications

Environmental

Mechanical

Single-Ended Electrical

Differential Electrical

Phase Relationship

Pin-Out

Options

H-OPTION (HOLE IN COVER)

M-OPTION (METRIC MOUNTING SCREWS)

Accessories

Product Change Notifications

Additional Information

Product Notes

Datasheets

Assembly Instructions & Videos

Press Releases

Related

3D Model Downloads

Related Products & Accessories

Centering Tool CTOOL & MCTOOL

SCREWS Thread Fasteners

SPACER Spacer Tool