BEI Sensors HS35 Express 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
HS35 Absolute Encoder
0.50
0.45
0.75
Ш 2.25 Ш 3.50 Ш 1.90
1.50 0.54
0.07
COLLET
CLAMPING RING
0.2502
0.2500
DOWEL PIN
Ш
1.003
1.001 Ш
TETHER BLOCK
TYPE R1 (OPTIONAL)
SHAFT PENETRATION
ON BLIND SHAFT UNITS
1.50 MAX, .5 MIN
6.25
1.75
.81
1.36
.50
R.225 1.00
.45
.020
Ш 3.50
.218 Ш THRU
12 PLACES
ON A Ø 3.00 B.C.
1.75
.480
15°
10-32UNF-2B X .38 DEEP
(3) ON A Ø 3.000 B.C.
Ø 3.50
ENCODER
BORE
2.50
1.42
MS3112E14-19P
MS3112E14-19P
.58
15°
(typ)
15° (typ)
30°(typ)
.249
.247
.281 Ø C' BORE
.250 DP
.156 Ø THRU
.812 R
.125R
0.249
0.247
Ø .203 THRU
C’Bore Ø .359 x .250 DEEP
1.125R
1.75R 1.450
0.31
.96
.388 .50
.50 .45
.83 (REF)
1.10
dimensions
1.The rubber 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. For these excep-
tions, a felt shaft seal is recommended. Felt seals require very low starting torque
and can virtually eliminate frictional heat. Encoders ordered with felt shaft seals
will have an enclosure rating of IP50 and will have less than 1/10th the Starting
Torque specified under Mechanical Configurations.
2. 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 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 replace-
ment 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.
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.
3. 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.
* Products manufactured prior to April 2007 used the line driver IC number instead of voltage output in model number.
0.50
0.45
0.75
2.25 Ø 3.50 1.90
1.50 0.54
0.07
COLLET
CLAMPING RING
0.2502
0.2500
DOWEL PIN
Ø
NYLATRON GS
TETHER BLOCK
TYPE R1 (OPTIONAL)
SHAFT PENETRATION
ON BLIND SHAFT UNITS
1.50 MAX, .5 MIN
6.25
1.75
.81
1.36
.50
R.225 1.00
.45
.020
Ш 3.50
.218 Ш THRU
12 PLACES
ON A Ø 3.00 B.C.
1.75
.480
15°
10-32UNF-2B X .38 DEEP
(3) ON A Ø 3.000 B.C.
Ø 3.50
ENCODER
BORE
1.0000 /1.0007
2.50
1.42
MS3112E14-19P MS3112E14-19P
.58
15°
(typ)
15° (typ)
30°(typ)
.249
.247
.281 Ø C' BORE
.250 DP
.156 Ø THRU
.812 R
.125R
0.249
0.247
Ø .203 THRU
C’Bore Ø .359 x .250 DEEP
1.125R
1.75R 1.450
0.31
.96
.388 .50
.50 .45
.83 (REF)
1.10
0.50
0.45
0.75
2.25 Ø 3.50 1.90
1.50 0.54
0.07
COLLET
CLAMPING RING
0.2502
0.2500
DOWEL PIN
Ø
NYLATRON GS
TETHER BLOCK
TYPE R1 (OPTIONAL)
SHAFT PENETRATION
ON BLIND SHAFT UNITS
1.50 MAX, .5 MIN
6.25
1.75
.81
1.36
.50
R.225 1.00
.45
.020
Ш 3.50
.218 Ш THRU
12 PLACES
ON A Ø 3.00 B.C.
1.75
.480
15°
10-32UNF-2B X .38 DEEP
(3) ON A Ø 3.000 B.C.
Ø 3.50
ENCODER
BORE
1.0000 /1.0007
2.50
1.42
MS3112E14-19P
MS3112E14-19P
.58
15°
(typ)
15° (typ)
30°(typ)
.249
.247
.281 Ø C' BORE
.250 DP
.156 Ø THRU
.812 R
.125R
0.249
0.247
Ø .203 THRU
C’Bore Ø .359 x .250 DEEP
1.125R
1.75R 1.450
0.31
.96
.388
.50
.50 .45
.83 (REF)
1.10
TOLERANCES: .XX=±0.01, .XXX=±0.005
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 clock out sensor
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 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.
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 transceiver
in transmit mode. The recommended receiver is a MAX
491 transceiver in receive mode.
2. Controller provides a series of pulses (or differ-
ential 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 parity 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 transmission
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
Output Code and Terminations
12 Bit 12 Bit
MSB G
11
2
11
G
10
2 10
G
9
2 9
G
8
2
8
G
7
2 7
G
6
2 6
G
5
2
5
G
4
2 4
G
3
2 3
G
2
2
2
G
1
2 1
lSB
12
G
0
2 0
lSB
13
0V (CiRCuiT CoMMoN)
1
DiReCTioN oF CouNT
CASe GRouND
0V (CiRCuiT CoMMoN)
lATCH CoNTRol
+V (SuPPlY VolTAGe)
SHielD DRAiN
WHT/BlK A
WHT/BRN B
WHT/ReD C
WHT/oRN D
WHT/Yel e
WHT/GRN F
WHT/Blu G
WHT/Vio H
WHT/GRY J
WHT K
GRY/BlK l
GRY/BRN M
GRY/ReD N
GRY/oRN P
oRN R
GRN S
BlK T
Yel u
ReD V
BARe —
Parallel code TerminaTion
TyPe
Gray
Code
Natural
Binary Cable M14/19
Conn
1 Pin P is available for a tri-state option
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
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 infor-
mation 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.
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.
Notes Figures
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
MS Connector Termination R1 Tether Block and Pin R2 Tether Arm
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