BEI Sensors L25 Data Sheet

L25 Incremental Optical Encoder

Mechanical Specifications

Shaft Diameter: 1/4” nominal
Flat On Shaft: 0.80 long x 0.03 deep
Shaft Loading: up to 5 lbs. axial and 8 lbs. radial
Shaft Runout: .0005 T.I.R. maximum
Starting Torque at 25°C: 0.07 in-oz typical, 0.12 in-oz maximum without sealed

bearings; 0.50 in-oz typical, 1.0 in-oz maximum with sealed bearings

Bearings: Class ABEC 5
Shaft material: 416 stainless steel
Bearing Housing: Die cast aluminum with iridite finish
Cover: Drawn aluminum, 0.060” wall, protective finish standard. Die cast aluminum

with protective finish for EM, SM, ECS and SCS terminations

Bearing Life: 1 X 109 revs (6,700 hrs at 2500 RPM)
Maximum RPM: 10,000

Moment of Inertia: 4.1 x 10-4 oz-in-sec
Weight: 13 oz. typical

Electrical Specifications

Code: Incremental
Cycles Per Shaft Turn: 1 to 28,800
Voltage/Output: (see note 5)

15V/V: Line Driver, 5–15 VDC in, V
28V/V: Line Driver, 5–28 VDC in, V
28V/5V: Line Driver, 5–28 VDC in, V
28V/OC: Open collector, 5–28 VDC in, OC

Current Requirements: TTL: 175 mA maximum 125 mA typical
Output Format: 2 channels in quadrature = 27º electrical typical. Optional index

is typically gated 1/2 cycle wide (see figure 1)

The L25 is a lighter duty version of BEI’s H25 optical encoder.

Incorporating the same high quality optics and electronics as the H25,

Protection Level: Reverse, overvoltage and output short circuit (4469, 7272 only)
Frequency Response: 100 kHz (see note 7), up to 800 KHz with interpolation option
Output Terminations: (see table 1)

out
out

out

2

= V

in

= V

in

= 5 VDC

out

the L25 also offers low starting torque. Other features include ABEC

5 bearings, EMI shielding, a 1/4” diameter stainless steel shaft and

a drawn aluminum cover. Typical applications include use with light

machine tools, test and laboratory instrumentation, the biomedical

industry and flow metering.

Environmental Specifications

Enclosure Rating: NEMA 2 (IP43)
Temperature: Operating, 0º to 70º C; extended temperature testing available

(see note 8); storage; -25º to 90º C

Shock: 50 g’s for 11 msec duration
Vibration: 5 to 2000 Hz @ 20 G’s
Humidity: 98% RH without condensation

NOTES & TABLES: All notes and tables referred to in the text can be found on the

back of this page.

Model L25 Ordering Options FOR ASSISTANCE CALL 800-350-2727

Use this diagram, working from left to right to construct your model number (Example: L25G-F3-SB-2000-ABZC-28V/V-SC18).

L25 G

TYPE:

L = Heavy Duty

25 = 2.500” Dia.

HOUSING CONFIG. LETTER:

G=2.62 Dia. Servo Mount

See dimensions

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.

OPTIONAL FACE

MOUNTS

F1, F2, F3, or F4

Blank = None

SHAFT SEAL CONFIGURATION:

SB = Seal Integral

with Bearing

Blank = Shielded Bearing

Tel: [phone] | Fax: [phone]
7230 Hollister Ave., Goleta, CA 93117-2807 | www.beisensors.com

CYCLES PER TURN:

(Enter Cycles)

See table 2

NO. OF CHANNELS:

A = Single Channel
AB = Dual Quad. Ch.

ABZ = Dual with Index

AZ = Single with Index

See note 3

COMPLEMENTS

C = Complementary

Outputs

Blank = None

See note 4

VOLTAGE/OUTPUT:

15V/V = 5-15 V

28V/5 = 5-28V
28V/OC = 5-28V

= 5-28V

See note 5

OUTPUT

TERMINATION

LOCATION:

E = End

S = Side

28V/V

in/out

in/out

5V

/

in

out

OC

/

in

out

MS3102R16S-1P

C = Pigtail Cable

CS = Cable with Seal

specified in inches

(i.e. C18 = Pigtail

See table 1 & note 9

OUTPUT

TERMINATION:

M16 =

D15 = DA15P

Cable length

18” long)

Specification No. 02004-001 Rev.08-11

SPECIAL

FEATURES:

S= Special

features specified

on purchase order

(consult factory)

See table 6

L25 Incremental Optical Encoder

.125

.125

SC = 1.60
EC = 2.06

Ø 2.625

30°

45°

30°

2.06

0.20

DA15P

CONNECTOR

10-32 UNF-2B

0.188 Min. Deep
3 places equally spaced
on a Ø 1.875. bolt circle.

F1

4-40 UNC-2B

0.250 Min. Deep
4 places equally spaced
on a Ø 1.272 bolt circle.
(0.900 square, Ref.)

F2

4-40 UNC-2B

0.250 Min. Deep
4 places equally spaced
on a Ø 2.00 bolt circle.

F3

6-32 UNC-2B

F4

SIDE
CABLE (SC)
18" PIGTAIL

LEADS

STANDARD

(22AWG)

END

CABLE

(EC)

OPTIONAL

0.88

± 0.03

0.22

2.500

2.498

Ø

0.2497

0.2495

Ø

30°

45°

10-32 UNF-2B

0.188 Min. Deep
3 places equally spaced
on a Ø 1.875. bolt circle.

F1

4-40 UNC-2B

F2

0.22

30°

45°

10-32 UNF-2B

0.188 Min. Deep
3 places equally spaced
on a Ø 1.875. bolt circle.

F1

4-40 UNC-2B

0.250 Min. Deep

F2

30°

10-32 UNF-2B

0.188 Min. Deep
3 places equally spaced
on a Ø 1.875. bolt circle.

F1

30°

45°

10-32 UNF-2B

0.188 Min. Deep
3 places equally spaced
on a Ø 1.875. bolt circle.

F1

4-40 UNC-2B

0.250 Min. Deep
4 places equally spaced
on a Ø 1.272 bolt circle.
(0.900 square, Ref.)

F2

30°

45°

10-32 UNF-2B

0.188 Min. Deep
3 places equally spaced
on a Ø 1.875. bolt circle.

F1

4-40 UNC-2B

0.250 Min. Deep
4 places equally spaced
on a Ø 1.272 bolt circle.
(0.900 square, Ref.)

F2

4-40 UNC-2B

0.250 Min. Deep
4 places equally spaced
on a Ø 2.00 bolt circle.

F3

Notes and Tables

The connector style will determine pinouts. For example, an encoder with
ABC channels and an M18 connector uses the table to the right.

Table 1: Incremental Output Terminations

M14 CONNECTOR M16 CONNECTOR CHANNELS DESIGNATED IN MODEL NO.

PIN PIN ABZ ABC

EA AA
DB BB
CC ZA
BD +V (SUPPLY VOLTA GE)
FE —B
AF 0 V (CIRCUIT COMMON)

G CASE GROUND (CG) (except H20)

M18 CONNECTOR

PIN CHANNEL

AA
BB
CZ
D+V
E—

F0V
GCG
HA

IB

JZ

WIRE COLOR DA 15P CHANNELS DESIGNATED IN MODEL NO.

(22AWG) CONNECTOR

ABZ ABC ABZC

YEL 13 AAA
BLUE 14 BB B
ORN 15 Z— Z

W-Yel10— AA
W-Blu 11 —B B
W-Orn 12 —— Z

RED 6 +V (SUPPLY VOLTAGE)

BLK 10 V (CIRCUIT COMMON)

GRN 9 CASE GROUND (CG) (except H20)

WHITE SHIELD DRAIN (Shielded Cable Only)

M12 CONNECTOR

PIN CHANNEL

AA
BB
CZ
D+V
E—
F0V
GCG
HA
JB
KZ

Dimensions Figure 1

L25G - M16 or M18

SC = 1.60
EC = 2.06

SIDE
CABLE (SC)
18" PIGTAIL

LEADS

STANDARD

(22AWG)

END

CABLE

(EC)

OPTIONAL

Optional Face Mounts

30°

F1

10-32 UNF-2B

0.188 Min. Deep
3 places equally spaced
on a Ø 1.875. bolt circle.

.125

0.88

± 0.03

.125

2.500

Ø

2.498

0.2497

Ø

0.2495

45°

F2

4-40 UNC-2B

0.250 Min. Deep
4 places equally spaced
on a Ø 1.272 bolt circle.
(0.900 square, Ref.)

Ø 2.625

F3

4-40 UNC-2B

0.250 Min. Deep
4 places equally spaced
on a Ø 2.00 bolt circle.

Tables

Table 1–Incremental Output Terminations

The connector style will determine pinouts. For example, an encoder with ABC
channels and an M18 connector uses the table to the right.

Table 2–Disc Resolutions for Incremental Encoder Model L25

1, 2, 3, 5, 6, 7, 8, 10, 13, 16, 20, 24, 25, 26, 30, 32, 33, 34, 36, 37, 40, 45, 48, 50, 51, 56*, 60, 64, 66, 72, 75,
80, 86, 88, 90, 100, 102, 120, 122,125, 127, 128, 132, 144, 148, 150, 158, 160, 175, 176, 180, 187, 192, 200,
202, 204*, 217, 220, 240, 250, 254, 255, 256, 264*, 274, 280, 283, 288, 292, 300, 312, 320, 321, 325, 360,
366, 372, 375, 377, 380, 381, 384, 385, 393, 400, 430, 432, 450, 462, 480, 490, 500, 502, 508, 512, 522,
530, 550, 560*, 576, 598, 600, 604, 625, 628, 635, 638, 640, 660, 672, 676, 680, 687, 690, 700, 720, 725,
735, 740, 744, 748, 750, 762, 768, 780, 785, 800, 812, 825, 850, 864, 878, 888, 900, 912, 914, 938, 942,
955, 960, 1000, 1016, 1024, 1030, 1035, 1036, 1040, 1054, 1056, 1074, 1076, 1080,1088, 1100, 1101, 1125,
1136, 1200, 1237, 1250, 1257, 1270, 1280, 1300, 1314, 1332, 1333, 1390, 1400, 1414, 1427, 1440, 1484,
1500, 1562, 1570, 1596, 1600, 1650, 1666, 1718, 1745, 1774, 1800, 1840*, 1850, 1855, 1875, 1894, 1920,
1952, 1968, 1979, 1995, 2000, 2048, 2080, 2094, 2100, 2160, 2164, 2199, 2200, 2250, 2356, 2400, 2485,
2500, 2514, 2519, 2540, 3000, 3125, 3600, 4000, 4096, 5000

* AB or ABC output only. Note: Resolutions up to 72,000 are available.

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7230 Hollister Ave., Goleta, CA 93117-2807 | www.beisensors.com

0.22

CONNECTOR

POSITION

1.30 (SM16)

1.65 (SM18)

MS3102R16S-1P

OR

MS3102R18-1P

CONNECTOR

CONNECTOR

SM

EM

POSITION

2.50

30°

F4

6-32 UNC-2B

0.250 Min. Deep
3 places equally spaced
on a Ø 2.00 bolt circle.

Output Waveform

1 CYCLE

90 Deg.

A

B

Z

A

B

Z

CCW Rotation Viewing Face

HI

LO

Notes

1. 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.

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

4. 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 impedance (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
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 120 mA typical (plus load current). 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 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). 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
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 pull­ups. The 5V/OCR, 15V/OCR and 24V/OCR are often replaced by the 28V/V
in system upgrades. 3904, 3904R, 4469, 5V/V, 5V/OC, 5V/OCR, 9V/OC:
Intrinsically safe line driver and open collector outputs. These drivers are spe­cific to intrinsically safe encoders, and are installed per the appropriate control
drawings listed in Table 2.on this page.

6. 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.

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

8. 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 factors.
Consult with factory for more specific information.

9. Mating straight plug receptacles may be ordered from the factory:
For M12 use MS3116F12-10S, For M14 use MS3106F14S-6S
For M14/19 use MS3116J14-19S, For M16 use MS3106F16S-1S
For M18 use MS3106F18-1S, For M20 use MS3106F20-29S

= Vin). This driver is TTL compatible when

out

= Vin). TTL compatible when used

out