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
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.
Mechanical Drawings
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 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 | |
| 34 | 42 | mA | CPR > 500, no load | ||
| Low-level Output | 0.4 | V | CPR ≤ 500, IOL= 8 mA | ||
| CPR > 500, IOL= 5 mA | |||||
| 0.035 | V | no load | |||
| High-level Output | 2.4 | V | CPR ≤ 500, IOH= -8 mA | ||
| CPR > 500, IOH= -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 | |
| 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
H-OPTION (HOLE IN COVER)
The H-option adds a 0.295" diameter hole in the cover for the shaft to pass through.
M-OPTION (METRIC MOUNTING SCREWS)
Provides alternate metric M2.5, length 4mm screws. When M-option is NOT specified the default is #3-48 x 3/16" screws.
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
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.
Configuration Options |
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| E4T | - | CPR (Cycles Per Revolution) 100 108 120 125 128 144 200 248 250 256 296 300 360 400 500 512 720 800 1000 | - | Bore Size 079 (2.0mm) 091 (2.3mm) 098 (2.5mm) 118 (3.0mm) 125 (1/8") 156 (5/32") 157 (4.0mm) 188 (3/16") 197 (5.0mm) 236 (6.0mm) 250 (1/4") | - | Output S (Single-Ended) D (Differential) | - | Cover D (Default) H (Through-Hole) | - | Base D (Default) M (Metric Screws) | - | Packaging B (Encoders packaged in bulk. Every order includes one centering tool and spacer tool. An additional set of tools is included for each 100 encoders ordered.) 1 (Encoders packaged individually. Every order includes one centering tool and spacer tool. An additional set of tools is included for each 100 encoders ordered.) 2 (Encoders packaged individually. Every order includes one centering tool and spacer tool per encoder.) | |||||||||||||||||||||||||||||||||||||||
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PLEASE NOTE: This chart is for informational use only. Certain product configuration combinations are not available. Visit the E4T product page for pricing and additional information. |
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