The H25 is the flagship of the BEI Sensors product line. It was designed from the ground
up for the industrial marketplace. The H25 offers features such as EMI shielding, 40 lb.
ABEC 7 bearings, matched thermal coefficients on critical components, and custom high-
efficiency optics. The encoder meets NEMA 4 and 13 requirements when ordered with
the shaft seal. Typical applications include machine control, process control, the wood
processing industry, oil well logging, industrial weighing, agricultural machinery, textile
equipment, web process control, robotics, and food processing.
Special Models of the H25 Incremental Encoder are available with one or more of the
following certifications. Consult factory for details.
EN 61000-6-4 and EN 61000-6-2
UL 12.0035X
UL 13.0071X
CENELEC
II 1 G Ex ia IIB/IIC T4
II 3 G Ex nA IIB T4 Gc
Class I, Group A,B,C & D;
Class II Group E, F & G
C
Class I, Zone 0, Group IIC
Class I, Div 2, Group A,B,C & D;
Class II, Div 2, Group F & G
Protection Level:
Reverse, overvoltage and output short circuit
(see note 5)
Frequency Response:
100 kHz, up to 1MHz with interpolation
option (see note 7)
Output Terminations:
(See table 1, back)
Note:
Consult factory for other electrical options
Mechanical Specifications
Shaft Diameter:
3/8” (1/2”as special feature)
Flat On Shaft:
3/8” Shaft: 0.80 long X 0.03” deep;
1/2” Shaft: 0.80 long X 0.04” deep (1/2’’ shaft w/flat must be
ordered as special feature)
Shaft Loading:
3/8” shaft: Up to 40 pounds axial and 35
pounds radial; 1/2” shaft: Up to 90 pounds axial and 80 pounds
radial
Shaft Runout:
0.0005 T.I.R. at midpoint regardless of
shaft diameter
Starting Torque at 25°C:
Without shaft seal 1.0 in-oz (max);
With shaft seal 2.5 in-oz (max); 1/2” shaft with shaft seal:
3.5 in-oz (max)
Bearings:
Class ABEC 7 standard, ABEC 5 for 1/2” shaft
Shaft Material:
416 stainless steel
Bearing Housing:
Die cast aluminum with protective finish;
stainless steel (special feature)
Cover:
Die cast aluminum; stainless steel (special feature)
Bearing Life:
2 X 10
8
revs (1300 hrs at 2500 RPM)
at rated load 1 X 10
10
revs (67,000 hrs at 2500 RPM) at
10% of rated load
Maximum RPM:
12,000 RPM nominal, 8000 RPM with
1/2” shaft (see Frequency Response, below) 30,000 RPM
available on units with 3/8” shaft—consult with factory
Moment of Inertia:
4.1 X 10
-4
oz-in-sec
2
; 5.2 X 10
-4
oz-in-sec
2
with 1/2” shaft
Weight:
13 oz typical, 14.5 oz typical with 1/2” shaft
Electrical Specifications
Code:
Incremental
Output Format:
2 channels in quadrature, 1/2 cycle index
gated with negative B channel
Cycles Per Shaft Turn:
1 to 72,000 (see table 2) For resolu-
tions above 3,600 see BEI for interpolation options
Supply Voltage:
5 to 28 VDC available
Current Requirements:
100 mA typical +output load,
250 mA (max)
Voltage/Output:
(see note 5)
15V/V: Line Driver, 5–15 VDC in, Vout = Vin
28V/V: Line Driver, 5–28 VDC in, Vout = Vin
28V/5: Line Driver, 5–28 VDC in, Vout = 5 VDC
28V/OC: Open Collector, 5–28 VDC in, OCout
Environmental Specifications
Enclosure Rating:
NEMA 4 & 13 (IP 66) when ordered with
shaft seal (on units with an MS connector) or a cable gland
(on units with cable termination).
Temperature:
Operating, 0º to 70º C; extended temperature
testing up to 105°C available; Storage, -25º to 90º C unless
extended temperature option called out.
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.
Use this diagram, working from left to right to construct your model number (example:
H25D-SS-2000-ABZC-28V/V-SM18).
All notes and tables referred to can be found on pages the back of this page.
H25 Incremental Ordering Options
H25
for assistance call 800-350-2727
OUTPUT
HAZARDOUS
AREA RATINGS:
TERMINATION
Blank = None
See Table 2
LOCATION:
EX = Intrinsically Safe
E = End
NI = Non-Incendive
See note 4
See note 1
S = Side
Contact factory for
HOUSING CONFIG.
NO. OF CHANNELS:
VOLTAGE/OUTPUT:
SHAFT SEAL
voltage options
X=
LETTER:
A = Single Channel
15V/V = 5–15 Vin/out
CONFIGURATION:
Express
OUTPUT
AB = Dual Quad. Ch.
28V/V = 5–28Vin/out
D=Square Flange
SS = Shaft Seal
Encoder
TERMINATION:
28V/5 = 5–28Vin/5Vout
E=2.50 Dia. Servo Mount
ABZ = Dual with Index
M12 = MS3112E12-10P
(Not avail. on H25G)
28V/OC = 5–28Vin/OCout
G=2.62 Dia. Servo Mount
AZ = Single with Index
M16 = MS3102R16S-1P
Blank = Shielded Bearing
See note 5
See dimensions
See note 3
See note 2
M18 =MS3102R18-1P
C = Pigtail Cable
EXPRESS ENCODERS:
Items highlighted with
are standard Express Encoders and ship in one to three days.
CS = Cable with seal
T2
and
T5
options are available as standard H25 Express Encoder model options.
Cable length specified in inches
(i.e. C18 = Pigtail 18” long)
TYPE:
H = Heavy Duty
25 = 2.500” Dia.
OPTIONAL
FACE MOUNTS
F1(E housing only),F2, F3,
or F4 Blank = None
CYCLES PER TURN:
(Enter Cycles)
COMPLEMENTS
C = Complementary
Outputs
Blank = None
See table 1 & note 9
SPECIAL
FEATURES:
S = Special
features specified
on purchase order
(consult factory)
See note 6
Tel: 805-716-0322 /800-350-2727
www.beisensors.com
Specification No. 02002-001 Rev C 08-17
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.
H25 Incremental Optical Encoder
Figure 1
Output Waveform
Notes
Tables
Table 1:
style will determine pinouts. For example, an encoder with
The connector
Incremental Output Terminations
The connector style will
M16 CONNECTOR
For example, an
DESIGNATED IN MODEL NO.
determine pinouts.
M14 CONNECTOR
CHANNELS
encoder with
ABC channels and an M18 connector uses the table to
ABZ
right.
the
PIN
PIN
ABC
M14 CONNECTOR
D
PIN
C
E
B
D
F
C
A
B
F
A
Table 1: Incremental Output Terminations
ABC channels and an M18 connector uses the table to the right.
E
WIRE COLOR
(2
2 AWG)
CONNECTOR
ABZ
ABC
ABZC
WIRE COLOR
DA 15P
1
CHANNELS DESIGNATED IN
A
MODEL NO.
YL
E
3
A
A
(22AWG)
CONNECTOR
1
ABZ
ABC
ABZC
BLUE
4
B
B
B
YEL
ORN
13
A
A
A
1
5
Z
—
Z
BLUE
14
B
B
B
W -l
Ye
1
0
—
A
A
ORN
15
Z
—
Z
W Bu
1
1
—
B
B
W-Yel
-l
10
—
A
A
W -r
On
1
2
—
—
Z
W-Blu
11
—
B
B
6
+ ( U P V LT G )
V S P LY O A E
Z
W-Orn
RED
12
—
—
BK
L
1
0 V (CIRCUIT COMMON)
RED
6
+V (SUPPLY VOLTAGE)
9
C S G O
COMMON)
e c p 2 )
AE R N C)
BLK
GRN
1
0V (CIRCUIT
U D ( G ( x e t H 0
S I L D
(CG)
( h e d
H20)
l n y
HED AN Sil d a
GRN
WHITE
9
CASE GROUND
R I
(except
e C b e O l )
WHITE
SHIELD DRAIN (Shielded Cable Only)
M16 CONNECTOR
B
PIN
C
A
D
B
E
C
D
F
E
G
F
G
D 1P
A5
A
CHANNELS DESIGNATED IN MODEL NO.
B
B
ABZ
ABC
Z
A
A
+ ( U P V
A
AGE)
V S P LY O
LT
B
B
—
B
Z
A
0 V
VOLTAGE)
COMMON)
(CIRCUIT
+V (SUPPLY
C S G O N ( G
B
( x e t H 0
AE RUD C) ecp 2)
—
0V (CIRCUIT COMMON)
CASE GROUND (CG) (except H20)
CHANNELS DESIGNATED IN MODEL NO.
A
A
M18 CONNECTOR
PIN
CHANNEL
A
CONNECTOR
A
M 18
B
B
PIN
CHANNEL
C
Z
A
A
D
+
B
B
V
E
C
Z
—
0
D
F
+V
V
E
G
—
CG
F
H
0V
A
G
I
CG
B
A
H
J
Z
I
J
PIN
CHANNEL
M 12 CONNECTOR
A
PIN
A
CHANNEL
A
B
A
B
B
C
B
Z
C
D
Z
+
V
D
E
+V
—
E
—
F
0
V
F
0V
G
CG
G
CG
H
H
A
A
B
B
J
J
Z
Z
K
K
M12 CONNECTOR
B
Z
Table
e
2:
2: Disc Resolutions for Incremental Encoder Models
