BEI Sensors H38 User Manual

H38 Incremental Optical Encoder

The H38 is an explosion

proof version of the field-

proven H25 encoder series.

The H38 is UL certified

for NEMA Class 4X

and 6 (outdoor non-

hazardous locations)

and Class 4X and 13

(indoor non-hazardous

locations). It is available with

Class 1, Group D, Division 1 or Class

2, Division 1 Group E, F, and G rating for use

in hazardous locations. It features a standard shaft seal, double bearing seals, and

a cast aluminum housing with hard anodized and dichromate sealed finish. The H38

is suitable for use in petroleum service industries, solvent refining operations, spray

painting applications, and explosive dust environments.

The H38 Incremental Encoder is avail able with the following certifications:

EN 55011 and EN 61000-6-2

U.S. Standards Class I, Group A,B,C & D;
Class II Group E, F & G

The Mine Safety and Health Administration (MSHA) is an organization
that operates in the United States and enforces compliance with safety

and health standards in the Nation’s mines. Consult factory for MSHA rated product.

CENELEC EEX ia IIC T4

Canadian Standards

C

Class I, Zone 0, Group IIC

Mechanical
Specifications

Shaft Diameter: 3/8” nominal
Shaft Loading: Up to 40 pounds

axial and 20 pounds radial applied
1/4” from housing

Shaft Runout: 0.0005 T.I.R.
Starting Torque at 25° C:

4.0 in-oz (max)

Bearings: Class ABEC 7 standard
Shaft Material: 303 stainless steel
Enclosure: Die cast aluminum, hard

anodized with dichromate sealed finish.
Shaft seals and sealed bearings are stan­dard to achieve environmental ratings.

Bearing Life: 2 X 10
2500 RPM) at rated load; 1 X 10
(67,000 hrs at 2500 RPM) at 10% of
rated load

Maximum RPM: 10,000 RPM
(see Frequency Response, below)

Moment of Inertia:

–4

4.1 X 10

oz-in-sec

Weight: 64 oz typical (approx 4 lbs)

Electrical
Specifications

Code: Incremental or Absolute
Output Format: 2 channels in quadra-

ture, 1/2 cycle index gated with negative
B channel, or Absolute to 13 bits
Cycles per Shaft Turn: 1 to 72,000

(see table 2, back page). For resolutions
above 3,600 see interpolation options
in the 2008 BEI Spec Guide on pages
36 and 37); Absolute to 8192 counts
per turn

Supply Voltage: 5 to 28 VDC available
Current Requirements: 100 mA typical

8

revs (1300 hrs at

2

10

revs

+output load, 250 mA (max)
Voltage/Output: (see note 3)

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

Protection Level: Reverse, overvoltage
and output short circuit (see note 3)

Frequency Response: 100 KHz, Up to
1MHz with interpolation option (see note 5)

Output Terminations: see Table 1,
back page

Termination Type: Compression type,
UL recognized. Accepts AWG 14 to 22,
stranded wire, strip 1/4”

Note: Consult factory for other
electrical options

out

=

out

=

out

= 5 VDC

out

Environmental
Specifications

Enclosure Rating: NEMA 4X & 6

(IP66), outdoor Non-Hazardous
locations, NEMA 4X & 13 (IP66),
indoor Non-Hazardous locations
Temperature: Operating, 0º to 70º C;

extended temperature testing available
(see note 6, back page); 80º C max for
UL and CEN approved units; storage;

-25º to 90º C.

Shock: 50 g’s at 11 msec
Vibration: 5 to 2000 Hz @ 20 g’s
Humidity: 100% RH
Hazardous Area Rating: Underwriters

Laboratories listed for use in hazardous
locations; Class I, Group C & D, Class II,

Groups E, F & G. NEC Class 2 circuits
only.

(All notes and tables referred to in the text can be
found on the back page.)

H38 Explosion Proof Ordering Options FOR ASSISTANCE CALL 800-350-2727

Use this diagram, working from left to right to construct your model number (example:H38D-2000-ABZC-28V/V-SC-CEN).
All notes and tables referred to can be found on the back of this page.

H38

TYPE:

H = Heavy Duty

38 = 3.75” Square

(see dimensions, back page)

HOUSING

CONFIGURATION:

D = Standard,

CYCLES PER TURN:

Enter Cycles,

See Table 2

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

NO. OF CHANNELS:

A = Single Channel
AB = Dual Quad. Ch.

ABZ = Dual with Index

AZ = Single with Index

See note 1

COMPLEMENTS:

C = Complementary Outputs,

VOLTAGE/OUTPUT:

15V/V = 5–15 V

28V/V = 5–28V

28V/5 = 5–28Vin/5V

28V/OC = 5–28Vin/OC

See note 3

Blank = None

See note 2

in/out

in/out

out
out

OUTPUT TERMINATION:

SC = Side Conduit, 1/2–14 NPSF

(dryseal) straight pipe threads

CERTIFICATION:

UL = Class I Group D Environments

CEN = UL Class I & II, Cenelec

IIB Environments

MSHA = Mine Safety and Health

Administration Certified

features specified

on purchase order

Specification No. 02051-001 Rev.10-13

SPECIAL

FEATURES:

S = Special

(consult factory)

See note 4

H38 Incremental Optical Encoder

4.57

0.26

2.84

0.3747

0.3745

0.38

.125

0.88

0.98

0.66

± 0.06

1/2-14NPSF (DRYSEAL)
STRAIGHT PIPE THREADS

2.499

2.496

0.32

Ø 0.390 (4X)

0.34 TWO FLATS
90°APART

3.75 SQUARE

2.828 SQUARE

Ø

Ø

Ø

Ø

LABYRINTH SEA L
ADDED FOR CLASS I I

2.8 4

0.374 7

0.374 5

0.3 8

Ø 0.62

1.5 0

0.12 5

0.31 2

. 125

0.88

± 0.06

2.49 9

2.49 6

0.32

Ø 0.390

(4)

3.75 SQUARE

2.828 SQUARE

Ø

Ø

4.57

LABYRINTH SEAL

Ø 2.84

0.3747

0.3745

0.38

Ø 0.62

1.50

.125

0.88

0.66

± 0.06

1/2-14NPSF (DRYSEAL)

2.499

2.496

0.32

Ø 0.390 (4X)

3.75 SQUARE

2.828 SQUARE

1

2

3

4

5

6

7

8

9

10

11

G V

CASE GND

4.57

0.26

2.84

0.3747

0.3745

0.38

.125

0.88

0.98

0.66

± 0.06

1/2-14NPSF (DRYSEAL)
STRAIGHT PIPE THREADS

2.499

2.496

0.32

Ø 0.390 (4X)

0.34 TWO FLATS
90°APART

3.75 SQUARE

2.828 SQUARE

Ø

Ø

Ø

Ø

Ø

Ø

4.57

LABYRINTH SEAL

Ø 2.84

0.3747

0.3745

0.38

Ø 0.62

1.50

0.14

0.312

.125

0.88

0.98

0.66

± 0.06

1/2-14NPSF (DRYSEAL)
STRAIGHT PIPE THREADS

(CEN) FRONT SCREWS ARE COVERED

2.499

2.496

0.32

Ø 0.390 (4X)

3.75 SQUARE

2.828 SQUARE

4.57

(CEN)

EARTHING

SCREW

0.26

2.84

0.3747

0.3745

0.38

.125

0.88

0.98

0.66

± 0.06

1/2-14NPSF (DRYSEAL)
STRAIGHT PIPE THREADS

2.499

2.496

0.32

Ø 0.390 (4X)

0.34 TWO FLATS
90°APART

3.75 SQUARE

2.828 SQUARE

Ø

Ø

Ø

Ø

Ø

Ø

(CEN) FRONT SCREWS ARE COVERED

0.32

Ø 0.390 (4X)

3.75 SQUARE

2.828 SQUARE

0.32

Ø 0.390 (4X)

0.34 TWO FLATS
90°APART

3.75 SQUARE

2.828 SQUARE

Dimensions

Notes

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

special order. Consult factory.

2. 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.

3. 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. Those 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
patible 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 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). 15V/V:
Multi-voltage Line Driver (4469*): 100 mA source/sink. Input volt­age 5 to 15 VDC +/- 5% standard (Note: V
patible when used with 5 volt. 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
is 120 mA typical. This replaces prior IC’s with designations of

UL

CEN

Rear View

out

8

7

6

5

4

3

2

V G

1

= Vin). This driver is TTL com-

+

/- 5% standard. Supply current

= Vin). TTL com-

out

1 1

0 1

9

D N G E S A C

3.75 SQUARE

Ø 0.390

(4)

0.32

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.

4. 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.

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

6. 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. Extended temperature
ranges can affect other performance factors. Consult with factory
for more specific information.

Encoder Installation:

1. Environment: Hazardous Locations — UL Complies with UL and

cUL Class Groups D, Div.1; CEN Complies with UL2 requirements
plus CENELAC/ATEX EEx d IIB T4.

2. WARNING: Open all circuits prior to connections of this product
to power and controller.

3. The installation must comply with NEC Class II circuits or with
the regulations of the country of use.

4. AWG 14 - 22 stranded wire stripped to .25

5. Use 105° C minimum rated cable/conductors housed within an

approved rigid conduit.

6. Conduit runs must have a sealing fitting certified to EN5Q018 as
EEx d IIB immediately at the entrance to the device.

7. Tightly close terminal block access cover prior to applying power.

8. For maximum bearing life, a flexible coupling is recommended

between encoder shaft and driving shaft.

During Use:

1. Keep terminal block access tightly secured during use.

2. DO NOT loosen two 5/16
Maintenance and Service:

1. There are no user serviceable parts inside. Encoder must be

returned to factory for service.

2. WARNING: Open all circuits to this product prior to opening
access cover to disconnect wires.

2.828 SQUARE

11

10

9

8

7

6

5

4

3

2

1

G V

CASE GND

”

[6.3mm} is recommended.

” set screws at opposite face.

(CEN)

EARTHING

SCREW

Tables

Table 1–Output Functions

TERMINAL INCREMENTAL GRAY CODE

PIN NO. OUTPUT OUTPUT*

1 CASE GRND. CASE GRND.
2 OV OV
3 +V +V
4 A G0
5 B G1
6 Z G2
7
8
9
10 SPARE G6
11 SPARE G7

Table 2 –

for Incremental Encoder

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.

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

www.beisensors.com

A
B
Z

Disc Resolutions

Model H38

8 BIT

G3
G4
G5