BEI Sensors H25X Absolute Shaft Encoder - Manual (Page 2)

Tel: 805-968-0782 /800-350-2727 | Fax: 805-968-3154 / 800-960-2726 | 7230 Hollister Ave., Goleta, CA 93117-2807
www.beisensors.com
H25X Absolute Optical Encoder
M14/19
Gray Code Natural Binary Connector Cable
14 BiT 15 Bit 14 BiT 15 Bit
MSB G
13
G
14
2 13 2 14 A WHT/BlK
G
12
G
13
2 12 2 13 B WHT/BRN
G
11
G
12
2 11 2 12 C WHT/ReD
G
10
G
11
2 10 2 11 D WHT/oRN
G
9
G
10
2
9
2
10
e WHT/Yel
G
8
G
9
2
8
2
9
F WHT/GRN
G
7
G
8
2 7 2 8 G WHT/BlU
G
6
G
7
2 6 2 7 H WHT/Vio
G
5
G
6
2 5 2 6 J WHT/GRY
G
4
G
5
2 4 2 5 K WHT
G
3
G
4
2 3 2 4 l GRY/BlK
G
2
G
3
2
2
2
3
M GRY/BRN
G
1
G
2
2
1
2
2
N GRY/ReD
lSB14 G
0
G
1
2 0 2 1 P GRY/oRN
lSB15 DiR G
0
DiR 2 0 R *
CoNTRol CoNTRol
CASe GRoUND S GRN
oV (CiRCUiT CoMMoN) T BlK
lATCH DiR/lATCH lATCH DiR/lATCH U *
+V (SUPPlY +V (SUPPlY +V (SUPPlY +V (SUPPlY V ReD
VolTAGe) VolTAGe) VolTAGe) VolTAGe)
SHielD DRAiN — BARe
Serial Synchronous Interface (SSI)
MS STYLE
CONNECTOR
1.30 (SM 14/19)
1.38
Ø 2.500
0.100
.100 MIN
Ø 2.275
1.2500
1.2495
0.300
EM CONNECTOR
POSITION
SM CONNECTOR
POSITION
2.50
0.255
0.30 Ø 2.52
MAX
1.2500
1.2495
2.064 TYP
2.650
SQUARE
NOTE: SHAFT SEAL NOT
AVAILABLE ON H25 G
Ø 0.218 4 HOLES
(Ø 2.919 B.C. REF)
1.032 0.21 R
0.3747
0.3745
0.88 ± 0.03
0.34
2.500
2.498
Ø 2.625
0.125
0.125
6-32 UNC-2B
0.250 Min. Deep
3 places equally spaced
on a Ø 2.00 bolt circle.
F4
10-32 UNF-2B
0.188 Min. Deep
3 places equally spaced
on a Ø 1.875 bolt circle.
F1
Ш
Ш
Ш
Ш
30° 30°
MS STYLE
CONNECTOR
1.30 (SM 14/19)
1.38
Ø 2.500
0.100
.100 MIN
Ø 2.275
1.2500
1.2495
0.300
EM CONNECTOR
POSITION
SM CONNECTOR
POSITION
2.50
0.255
0.30 Ø 2.52
MAX
1.2500
1.2495
2.064 TYP
2.650
SQUARE
NOTE: SHAFT SEAL NOT
AVAILABLE ON H25 G
Ø 0.218 4 HOLES
(Ø 2.919 B.C. REF)
1.032 0.21 R
0.3747
0.3745
0.88 ± 0.03
0.34
2.500
2.498
Ø 2.625
0.125
0.125
6-32 UNC-2B
0.250 Min. Deep
3 places equally spaced
on a Ø 2.00 bolt circle.
F4
10-32 UNF-2B
0.188 Min. Deep
3 places equally spaced
on a Ø 1.875 bolt circle.
F1
Ш
Ш
Ш
Ш
30° 30°
MS STYLE
CONNECTOR
1.30 (SM 14/19)
1.38
Ø 2.500
0.100
.100 MIN
Ø 2.275
1.2500
1.2495
0.300
EM CONNECTOR
POSITION
SM CONNECTOR
POSITION
2.50
0.255
0.30 Ø 2.52
MAX
1.2500
1.2495
2.064 TYP
2.650
SQUARE
NOTE: SHAFT SEAL NOT
AVAILABLE ON H25 G
Ø 0.218 4 HOLES
(Ø 2.919 B.C. REF)
1.032 0.21 R
0.3747
0.3745
0.88 ± 0.03
0.34
2.500
2.498
Ø 2.625
0.125
0.125
6-32 UNC-2B
0.250 Min. Deep
3 places equally spaced
on a Ø 2.00 bolt circle.
F4
10-32 UNF-2B
0.188 Min. Deep
3 places equally spaced
on a Ø 1.875 bolt circle.
F1
Ш
Ш
Ш
Ш
30° 30°
MS STYLE
CONNECTOR
1.30 (SM 14/19)
1.38
Ø 2.500
0.100
.100 MIN
Ø 2.275
1.2500
1.2495
0.300
EM CONNECTOR
POSITION
SM CONNECTOR
POSITION
2.50
0.255
0.30 Ø 2.52
MAX
1.2500
1.2495
2.064 TYP
2.650
SQUARE
NOTE: SHAFT SEAL NOT
AVAILABLE ON H25 G
Ø 0.218 4 HOLES
(Ø 2.919 B.C. REF)
1.032 0.21 R
0.3747
0.3745
0.88 ± 0.03
0.34
2.500
2.498
Ø 2.625
0.125
0.125
6-32 UNC-2B
0.250 Min. Deep
3 places equally spaced
on a Ø 2.00 bolt circle.
F4
10-32 UNF-2B
0.188 Min. Deep
3 places equally spaced
on a Ø 1.875 bolt circle.
F1
Ш
Ш
Ш
Ш
30° 30°
H25XD - Square Flange H25XE - 2.50 Servo Mount
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 instal-
lations. The most common exceptions are applications
requiring a very low starting torque or those requiring
operation at both high temperature and high speed.
3. 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.
4. 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 cur-
rent and their lower impedance mean better noise immu-
nity 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
in
). This driver is 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 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% stan-
dard, 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 typi-
cal (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.
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 typi-
cal. This replaces prior IC’s with designations of 3904,
7406, 3302, 681 and 689.
5. 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.
6. Higher frequency response may be available. Please
consult with the factory.
7. Extended temperature ratings are available in the follow-
ing 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.
8. Mating straight plug receptacles may be ordered from
the factory: For M14/19 use MS3116J14-19S,
For M16 use MS3106F16S-1S
For standard pinouts, refer to the facing page.
* Products manufactured prior to April 2007 used the line driver IC number instead of voltage
output in model number.
Notes
SSI output provides effective synchronization
in a closed-loop control system. A clock pulse
train from a controller is used to clock out sen-
sor data: one bit of position data is transmitted
to the controller per one clock pulse received
by the sensor. The use of a differential driver
permits reliable transmission of data over long
distances in environments that may be electri-
cally noisy. The encoder utilizes a clock signal,
provided by the user interface, to time the
data transmission. Receiving electronics must
include an appropriate receiver as well as line
terminating resistors.
Features :
•
Synchronous transmission
•
Transmission lengths to 1000 feet
•
Accepts clock rates from 100 KHz to 1.8 MHz
Data Transmission Sequence
1. Output driver of the encoder is a MAX 491 trans-
ceiver in transmit mode. The recommended receiver is
a MAX 491 transceiver in receive mode.
2. Controller provides a series of pulses (or dif-
ferential pulse pairs) on the CLOCK input lines.
3. On the first HIGH-to-LOW CLOCK transition, the
encoder latches its data at the current position and
prepares to transmit.
4. Controller reads data on the falling edge of the
next 15 clock cycles.
5. The first bit is a START bit and is always HIGH.
6. Next comes 13 data bits beginning with the
most significant bit (MSB) and ending with the par-
ity bit. On 12 bit encoders, bit 13 is LOW. When
parity is not ordered, parity is LOW.
7. After the last CLOCK HIGH-to-LOW transition,
a minimum of 40 microseconds must pass before
the beginning of the next CLOCK series.
interfacing long Data lines
Cable impedance can create a transmission
delay, in effect, shifting the phase relationship
between the clock pulse and the data. If this
phase shift exceeds 180°, then the wrong bit
position will be sampled by the receiver. As a
result, the maximum allowable clock frequency
is a function of the cable length. For 24 AWG,
stranded, 3 pair cable (BEI part number 37048-
003 or equivalent) the group delay is 1.36ns/ft.
The table below shows the maximum transmis-
sion rate allowable as a function of cable length
to ensure a phase shift of less than 90°.
Ordering SSI : HOW TO SPECIFY SSI OUTPUT IN THE ENCODER MODEL
NUMBER: Use the designation, S3 between the
Code Format designation
and the Connector designation. Example: H25D-SS-12GC-S3-CW-SM18
Cable length (ft) 50 100 200 300 500 1000
Max Freq (kHz) 1800 900 500 300 200 100
CLOCK, Maximum (kHz) =
92,000 / Cable Length (ft)CW
7230 Hollister Avenue | Goleta, CA 93117-2891 | Tel: (805) 968-0782 | Fax: (805) 968-3154
0539
CONNECTOR*
DATA+ A
FUNCTION
YEL
CABLE
1
H40
TERM BOARD
DATA- H WHT/YEL 7
CLOCK+ B BLU 2
CLOCK- I WHT/BLU 8
DIRECTION CONTROL C ORN 3
ENABLE (OPTIONAL) J WHT/ORN 9
SUPPLY VOLTAGE (+V) D RED 4
CIRCUIT COMMON (0V) F BLK 5
CASE GROUND G GRN 6
Max. Frequency (KHz)
Cable Length (feet) 50
1800
100
900
500
200
300
300
200
500
100
1000
1 2 12 13 14 15
START
BIT MSB MSB-1 LSB12 LSB13 Parity
(Optional) DATA+
CLOCK+
START
BIT
NEXT CLOCK
START OF
4
2
1
3
9
6
8
7
5
H38
1RB90 A
SPECIFICATION ADDENDUM, Serial Synchronous Interface SSI):
SSI output provides effective synchronization in a closed-loop control system. A clock
pulse train from a controller is used to shift out sensor data: one bit of position data is
transmitted to the controller per clock pulse received by the sensor. The use of a
differential driver permits reliable transmission of data over long distances in
environments that may be electrically noisy. The encoder utilizes a clock signal,
provided by the user interface, to time the data transmission. Receiving electronics must
include an appropriate receiver as well as line terminating resistors. An optional parity
bit is available to validate the transmitted data.
Features:
Synchronous transmission
RS422/485 compatible
Transmission lengths to 1000 feet
Accepts clock rates from 100 KHz to 1.8 MHz
Parity bit option is available
Data Transmission
Sequence:
1. Data from the encoder is sent with a MAX 491 transceiver in transmit mode. It is
recommended to use any RS-422/485 compatible receiver and provide a termination resistor
based on the RS-422/485 specification for your specific voltage and DATA line length.
2. The CLOCK signals are RS-422/485 compatible, differential TTL, with 180 Ohm termination
resistors internal to the encoder. A series of pulses from the controller, on the CLOCK
lines, advances the data.
3. On the first HIGH-to-LOW CLOCK transition, the encoder latches its data at the current
position and prepares to transmit. The DATA signal during this transition is a START bit,
which is always HIGH.
4. The encoder shifts data to the DATA line on each LOW-to-HIGH clock transition, beginning
with the MSB. The controller reads data on the HIGH-to-LOW transiton of the next 12 clock
cycles ending with the LSB. The parity bit (if parity option is specified) is clocked out on
the 14th clock cycle. When the parity option is used, the 13th bit output is a logic LOW on
a 12 bit Encoder or the LSB of a 13 bit Encoder.
5. Parity is even. The sum of all data bits and the parity bit is even.
6. After the last CLOCK LOW-to-HIGH transition, a minimum of 30 microseconds must pass
before the beginning of the next CLOCK series.
SPECIFICATION ADDENDUM
Serial Synchronous Interface (SSI)
REVISIONS
DESCRIPTION
DIMENSIONS ARE IN INCHES
APPLY AFTER FINISH
REMOVE BURRS AND BREAK ALL
SHARP EDGES .010 MAX
ALL DIA. TO BE WITHIN .010
ANGLES ± 0 30'
.XXX ±.005
.XX ±.01
TOLERANCES ON 63
UNLESS OTHERWISE SPECIFIED
APPR
ENGR
CHECKED
SCALE: NONE
SIZE
A
TITLE
1RB90
FSCM NO.
KRB redrawn 04/06/05 DATE
LTR
924-02087-001
DWG NO.
SHEET: 1/2
APPR DATE
REV
A
924-02087-001
BEI I N D U S T R I A L E N C O D E R D I V I S I O N
B E I T E C H N O L O G I E S , I N C.
BEI TECHNOLOGIES, INC. ANY REPRODUCTION, USE OR DISCLOSURE
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
OF THIS DOCUMENT WITHOUT WRITTEN CONSENT OF
BEI TECHNOLOGIES, INC. IS EXPRESSLY PROHIBITED.
12-24VDC (300mA MAX)
SIZE FSCM NO.
SCALE: NONE
DWG NO.
A
SHEET: 2/2
BEI I N D U S T R I A L E N C O D E R D I V I S I O N
B E I T E C H N O L O G I E S , I N C.
924-02087-001
REV
Interfacing Long Data Lines:
Cable impedance creates a transmission delay, shifting the phase relationship between the clock pulse and the data. If this pulse shift exceeds 180 , then the wrong bit position will be sampled
by the receiver. The maximum allowable clock frequency, therefore, is a function of the cable
length. For 24 AWG, stranded, 3 pair cable (BEI part number 37048-003 or equivalent) the group
delay is 1.36nS/ft. The table below shows the maximum transmission rate allowable as a function
of cable length to ensure a phase shift of less than 90 .
CLOCK: Maximum (KHz) = 92,000/Cable Length (ft)
*Connector is a MS3102E18-1P, 10-pin connector on the encoder body and mates to an MS3106F18-1S connector or can be used with a standard cable/connector assembly, BEI P/N: 924-31186-18XX.
(XX = cable length in feet, ie. 10 = 10 feet)
Direction Control: Standard is CW for increasing count when viewed from the shaft end. Direction Control (Pin C) is normally HIGH (or N/C) and is pulled up internally to the positive supply voltage. To reverse the count direction,
Pin C must be pulled to LO (0V)
SSI Compatible Serial Code (S3):
20us Max
SSI Compatible Output with Parity Option Timing Diagram:
40us Min
30us Min
Encoder: H25D - SS - 12GC - S3 - SM18 - S
Example Model Number:
Specials:
-S = Parity Bit
To specify
SSI Output
A ECO_500 4/13/05
30
40
SSi Timing
M18
Conn
M14/19
Conn
Cable
Conn
DATA + A A Yel
DATA- H B WHT/Yel
CloCK+ B C BlU
CloCK- i D WHT/BlU
DiR CoNTRol C R oRN
CASe GRoUND G S GRN
CiRCUiT CoMMoN F T BlK
+V SUPPlY VolTAGe D V ReD
SHielD DRAiN — — BARe
SSI Output Termination Table
Direction of Count: Standard is CW increasing when viewed from the
shaft end. Pin R is normally HI (or N/C) and is pulled up internally to +V.
To reverse the count direction, Pin R must be pulled LO (COMMON ).
Latch control: Encoder outputs are active and provide continuous
parallel position information when Pin U is HI (or N/C). Pin U is pulled up
internally to +V. When Pin U is LO (COMMON) the encoder outputs are
latched at the logic state that is present when the latch is applied and
will stay latched until Pin U is no longer grounded.
Dir/Latch on 15-Bit Encoders: Due to a limited number of connector
pins, either direction of count or latch is available on pin U. Direction
standard of latch specified as -S special.
M18 Connector is a MS3102R18-1P, 10-pin connector on the
encoder body and mates to an MS3106F18-1S connector or can be
used with a standard cable/connector assembly, BEI P/N 924-31186-
18XX (Where XX = 10, 20 30 or 50 for a 10, 20, 30, or 50 foot length).
This is the preferred connector for SSI output.
M14/19 Connector is a MS3112E14-19P, 19-pin connector on the
encoder body and mates to an MS3116J14-19S or equivalent. * DIR Control - ORN, LATCH - YEL, 15 bit LSB-GRY/YEL
2 Units Manufactured before April 2007 are LSB Justified
Figures Dimensions
ONE REVOLUTION
CW Increasing Count Viewing Shaft
CW Increasing Count Viewing Shaft
ONE REVOLUTION
ETC. THRU LSB (GO)
ETC. THRU LSB (20)
ONE REVOLUTION
CW Increasing Count Viewing Shaft
CW Increasing Count Viewing Shaft
ONE REVOLUTION
ETC. THRU LSB (GO)
ETC. THRU LSB (20)
Figure 1
Gray Code
Figure 2
Natural Binary
Parallel Code (14 & 15 Bit)
2