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L15 Incremental Optical Encoder

Mechanical Specifications

Shaft Diameter:

1/4 inch nominal

Shaft Loading:

Up to 5 pounds axial and 5 pounds radial

Shaft Runout:

0.002 T.I.R. at midpoint of shaft

Starting Torque at 25°C:

0.20 in-oz (max)

Bearings:

Sealed, instrument grade

Shaft Material:

416 stainless steel

Bearing Housing:

Aluminum with protective finish

Cover:

Drawn aluminum

Bearing Life:

1 X 10

revs (10,000 hrs at 1500 RPM)

Maximum RPM:

5,000 RPM nominal (see Frequency Response, below)

Moment of Inertia:

1.0 X 10

-4

oz-in-sec

Weight:

6 oz (max)

Output Format:

2 channels in quadrature, 1/2 cycle index gated with negative B channel

Cycles Per Shaft Turn:

24 to 40,640 (see Table 2 back page)

Supply Voltage:

5-28 VDC

Current Requirements:

100mA typical + output load 250mA (max), 150mA (max) with 28V/5

Voltage/Output:

28V/V: Line Driver, 5–28VDCin, Vout =Vin

28V/5: Line Driver, 5–28VDCin, Vout =5VDC

28V/OC: Open Collector, 5–28VDCin, OCout

Protection Level:

Reverse, overvoltage and output short circuit

Frequency Response:

100kHz (non-interpolated),Up to 1 MHz interpolated

Output Termination Pinouts:

see table on back page

Electrical Specifications

The L15 provides the industrial marketplace with a rugged high-

resolution encoder in a compact size 15 servo package. Engineered

with robust interpolative electronics, the L15 offers up to 40,640 cycles

per turn. Ideal for space or weight limited applications, these compact

encoders discount size without compromising performance.

The L15 encoder features 1/4-inch diameter stainless steel shaft and

can accommodate up to 5 pounds radial or axial load. The L15 encoder

package has field-proven ASIC electronics, sealed dual bearings and

BEI’s accurate code disk in an all metal housing to ensure ruggedness

and reliability.

The L15 Incremental Encoder is available with the

following certifications:

EN 55011 and EN 61000-6-2

Environmental Specifications

Enclosure Rating:

NEMA 3. (IP53)

Temperature:

Operating, 0º to 70º C; extended temperature testing available,

-40º to 85º ; storage, -40º to 90º C

Shock:

50 G’s for 11 msec duration (1/2 Sine)

Vibration:

20 to 2000 Hz @ 20 g’s

Humidity:

98% RH non-condensing

NOTES & TABLES:

All notes and tables referred to in the text can be found on

the back of this page.

L15 Incremental Ordering Options

L15

TYPE

L = Light Duty

15 = 1.5 inch

diameter

HOuSINg:

M = Standard

for assistance call 800-350-2727

Use this diagram, working from left to right to construct your model number (example: L15M-F25-256-ABZC-28V/V-SC18)

CHANNELS:

ABZ

ABZC

SPECIAL

FEATuRES:

S= Special

features specified

on purchase order

(consult factory)

FACE MOuNT:

F25 = Standard

RESOLuTION

NuMBER OF CYCLES:

1 to 2540

See Table 2, back page

See Figure 1,

back page

INTERPOLATION:

T2, T3, T4, T5, T8,

T10, T12, T16

VOLTAgE/OuTPuT:

28V/V = 5-28V

in/out

28V/OC = 5-28V

out

See note 5

See note 6

OuTPuT

TERMINATION:

SCS = Shielded, Jacketed Cable with Cable

Gland Seal and Cable length in inches

(i.e. SCS18 = Pigtail 18 inches)

See table 1, back page

tel: 805-968-0782 /800-350-2727 | fax: 805-968-3154 / 800-960-2726

7230 Hollister ave., Goleta, ca 93117-2807 |

www.beisensors.com

specification no. 02069 rev.08-11

These commodities, technology or software if exported from the United States must be in accordance with the Bureau of Industry, and Security, Export Administration regulations. Diversion contrary to U.S law is prohibited.

L15 Incremental Optical Encoder

Notes

Mounting is usually done either using the D-style square flange mount, E- or G-style servo

mounts, or one of the standard face mounts, F1 for example. Consult factory for additional

face mount options.

2.The

shaft seal is recommended in virtually all installations. The most common exceptions

are applications requiring a very low starting torque or those requiring operation at both high

temperature and high speed.

Non-standard index widths and multiple indices are available by special order.

Consult factory.

Complementary outputs are recommended for use with line driver type (source/sink)

outputs. When used with differential receivers, this combination provides a high degree

of noise immunity.

5. Output IC’s:

Output IC’s are available as either Line Driver (LD) or NPN Open Collector

(OC) types. Open Collectors require pull-up resistors, resulting in higher output source imped-

ance (sink impedance is similar to that of line drivers). In general, use of a Line Driver style

output is recommended. Line Drivers source or sink current and their lower impedance mean

better noise immunity and faster switching times.

Warning:

Do not connect any line driver

outputs directly to circuit common/OV, which may damage the driver. Unused outputs should

be isolated and left floating. Our applications specialists would be pleased to discuss your

system requirements and the compatibility of your receiving electronics with Line Driver

type outputs.

28V/V:

Multi-voltage Line Driver (7272*): 100 mA source/sink. Input voltage 5 to 28 VDC

+/- 5% standard (Note: V

out

= V

). This driver is TTL compatible when used with 5 volt sup-

ply. Supply lines are protected against overvoltage to 60 volts and reverse voltage. Outputs

are short circuit protected for one minute. Supply current is 120 mA typical (plus load cur-

rent). This is the recommended replacement for 3904R and 7406R open collector outputs

with internal pullup resistors. It is also a direct replacement for any 4469, 88C30, 8830 or

26LS31 line driver.

28V/5:

Multi-voltage Line Driver (7272*): 100 mA source/sink. Input voltage 5 to 28 VDC +/-

5% standard, internally regulated with 5V (TTL compatible) logic out. Supply lines are pro-

tected against overvoltage to 60 volts and reverse voltage. Outputs are short circuit protected

for one minute. Supply current is 90 mA typical (plus load current).

Note:

Limit encoder load

to 2.5W max at ambient. Example at 12 VDC: 2.5W/(+12VDC minus +5VDC) = 357 mA total

allowed current. Consult factory for your specific requirements.

15V/V:

Multi-voltage Line Driver (4469*): 100 mA source/sink. Input voltage 5 to 15 VDC

+/- 5% standard (Note: V

out

= V

). TTL compatible when used with 5 volt supply. Supply

lines are protected against overvoltage to 60 volts and reverse voltage. Outputs are short

circuit protected for one minute. Supply current is 90 mA typical (plus load current). This is a

direct replacement for the 4469 Line Driver.

28V/OC:

NPN Open Collector (3904*, 7273*). Current sink of 80 mA max. Current sourced

by external pull- up resistor. Output can be pulled up to voltage other than supply voltage (30

V max). Input voltage 5 to 28 VDC

/- 5% standard. Supply current is 120 mA typical. This

replaces prior IC’s with designations of 3904, 7406, 3302, 681 and 689.

5V/OCR, 15V/OCR, 24V/OCR:

Open Collector (3904R*, 7406R*, 7273R*): Current sink of

70 mA max. Includes internal pull-ups sized at approximately 100 ohms/volt. Max current

source is 10 mA. Supply current is 100 mA typical, 120 mA with internal pull-ups. The 5V/

OCR, 15V/OCR and 24V/OCR are often replaced by the 28V/V in system upgrades.

Special –S at the end of the model number is used to define a variety of non-standard

features such as special shaft lengths, voltage options, or special testing. Please consult the

factory to discuss your special requirements.

Higher frequency response may be available. Please consult with the factory.

Extended temperature ratings are available in the following ranges: -40 to 70°C, -40 to

85°C, –20 to 105°C and –40 to 105°C depending on the particular model. Some models

can operate down to -55°C. Extended temperature ranges can affect other performance fac-

tors. Consult with factory for more specific information.

* Products manufactured prior to April 2007 used the line driver IC number instead of voltage output in model number.

Tables

Table 1–

Output Functions

COLOR

RED

BLK

YEL

WHT/YEL

BLU

WHT/BLU

ORN

WHT/ORN

BARE

FUNCTION

+V (SUPPLY)

0 V (COMMON)

SHIELD DRAIN

Table 2–

L15 Disc Resolutions

(Other resolutions and interpolation

options available—consult factory.)

24 50 100 200 256

300

360 400

500

512 625 900 1000

1024 1200 1250 1440

1800 2000 2048 2500

2540

Figure 1

Output Waveforms

Dimensions

TOLERANCES: .XX=±0.02, .XXX=±0.005

tel: 805-968-0782 /800-350-2727 | fax: 805-968-3154 / 800-960-2726 | 7230 Hollister ave., Goleta, ca 93117-2807

www.beisensors.com

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