REV. 11-29-00
INDUSTRIAL AUTOMATION, INC.
8901 E. PLEASANT VALLEY RD., INDEPENDENCE, OH 44131, U.S.A. • (216) 642-1230 • FAX (216) 642-6037 • www.avtronencoders.com
INDUSTRIAL AUTOMATION, INC.
OPTION INSTALLATION LOCATION
ALL DIMENSIONS ARE IN INCHES
WITH METRIC EQUIVALENTS IN PARENTHESIS
M385
8 9 0 1 E . P L E A S A N T VA L L E Y R O A D
INDEPENDENCE, OHIO 44131-5508
T E L E P H O N E : ( 1 ) 2 1 6 - 6 4 2 - 1 2 3 0 • FA X : ( 1 ) 2 1 6 - 6 4 2 - 6 0 3 7
E - M A I L : t a c h s @ a v t r o n . c o m • W E B : w w w. a v t r o n e n c o d e r s . c o m
Inactive Design
Replaced by Model AV485
DESCRIPTION
INSTALLATION
The Avtron Model M385 Pulse Generator is a NEMA 56C
face mounted, zero-speed incremental rotary transducer,
designed for industrial environments. When mounted to a
machine shaft, it provides a specific number of electrical
pulses per revolution that are proportional to the shaft’s
rotation. The photoelectric sensing system and electronics
are protected by an O-ring sealed, cast aluminum housing.
Special installation procedures allow operation in particularly dirty environments.
The M385 is designed to face mount to a NEMA 56C accessory flange. A flexible, zero-backlash coupling should be
used to connect to the 5⁄8" steel shaft. Do not subject the
generator’s shaft to axial thrust. The coupling must have the
ability to absorb any shaft endplay.
The M385’s second output option is electrically independent
and totally isolated. For many applications, this feature provides a running spare output by simply interchanging the
military quality output connectors.
The available options for the M385, and how they are indicated in the M385 part number, are shown below:
CAUTION
Do not force or drive the coupling onto the shaft, or
damage to the bearings may result. The coupling
should slide easily on the shaft. Tighten the generator
mounting hardware prior to locking the coupling on
the shaft.
On installations where frequent large temperature swings
occur, and especially where moisture is a problem, special
venting of the housing should be considered. Consult the
factory for specific details.
CAUTION
MODEL STYLE PPR OPTIONS
M385 1 R 1024 B N 15
15
12 TO 15 VDC
C
MS CONNECTOR
L
90° MS CONNECTOR
N
WIRE LEADS
T
TERMINAL BOX
B
BIDIRECTIONAL
PPR (PULSES PER REVOLUTION)
R*
D
M385OPMAC
a- MS3101F18-1P
b- MS3106F18-1S
c-5ft. OF 1/2" FLEXIBLE METAL CONDUIT
FEATURES SUBJECT TO CHANGE WITHOUT NOTICE
3.12
0.6245
0.6250
(15.8623)
(15.8750)
0.13 MAX
(3.30)
4.25 MAX
(107.95)
b
b
2.08
MAX
(52.83)
a
(4.76)
3/16 SQ. KEY
(FURNISHED)
4.500
4.497
(114.300)
(114.224)
AVTRON STANDARD WARRANTY APPLIES. COPIES AVAILABLE UPON REQUEST.
1.28
2.00
3.00
0.38
4.75
5.50
c
c
(22.86)
3/8-16 UNC-2B X 0.90 DP
4 HOLES EQUALLY SPACED
ON A 5.875 DIA. (149.225)
1.094 DIA HOLE FOR
3/4" CONDUIT ENTRY
NEMA
TYPE 12
ENCLOSURE
1.12
2.00
c
"T"
INTERNAL TERMINAL
STRIP PREWIRED
ON GENERATOR SIDE
"N"
WIRE LEADS
FOR
CUSTOMERS
SUPPLIED
JUNCTION BOX
"L"
90˚ ELBOW
MS STYLE
CONNECTIONS
"C"
MS STYLE
CONNECTIONS
OPTION DETAILS
6.60 MAX
(167.64)
Encoder
Instructions
SINGLE OUTPUT
DUAL ISOLATED OUTPUTS
(ONE EACH SIDE)
SINGLE SHAFT (ONLY)
BASIC MODEL NUMBER
R*:RIGHT SIDE AS VIEWED FROM ANTI-DRIVE END
The M385 is often used for speed feedback in drive
systems, where any failure can cause a machine shutdown. While the M385 is designed for continuous mill
operation, it is important to follow proper procedures
with this unit.
REPAIR of defective units requires returning the unit
to the factory, where there is special test equipment.
Turnaround time is minimal, and charges are nominal
for out-of-warranty units.
DO NOT install M385 (or any other rotating equipment)
where liquids will be sprayed or hosed onto them. If
necessary, provide a shield.
DO NOT connect oscilloscope or any instrument common to any pulse generator connection other than
common.
WIRING CONSIDERATIONS
For bidirectional operation of the pulse generator, proper
phasing of the two output channels is important. Phase A
channel leads phase B channel for clockwise rotation as
viewed from the end-cap (anti-drive) end of the generator.
Interconnecting cables specified in the wiring diagrams
are based on typical applications. Refer to the system
drawing for specific cable requirements where applicable.
Physical properties of cable such as abrasion, temperature, tensile strength, solvents, etc., are dictated by the
specific application. General electrical requirements are:
stranded copper, 22 through 16 gauge, braid or foil with
drain wire, 0.05 µF maximum total mutual or direct capacitance, outer sheath insulator, 1,000 ft. maximum.
ENVIRONMENTAL CONSIDERATIONS
Special attention is to be given to conduit runs, interconnection wiring and NEMA type enclosure mounting. In those applications where ambient temperatures are controlled within
WIRING DIAGRAM
40°F and high humidity/washdown are not present, position
the flexible conduit with a slight sag to prevent any condensation from entering the pulse generator via the conduit.
In harsh environments, which include temperature extremes, high humidity, equipment washdown or atmospheric contamination, extra care is required for interconnection. Follow these steps to reduce potential problems:
FOR SINGLE ENDED APPLICATIONS
1. Always mount connection points, conduit couplings,
junctions boxes, etc., lower than actual generator.
2. Venting of generator is beneficial. One method is to take
conduit run outside of hostile area where practical.
OUTPUT OPTIONS
M385
3. For washdown areas, shroud or otherwise cover the
pulse generator to prevent direct water spray. Do not attach the shroud directly to the generator.
4. Keep conduit outputs and axis of rotation horizontal.
N
C&L
T
RED
BLUE
B
E
+V
B
GREEN
BLACK
D
A
A
COM
5. Purging of pulse generator should be reviewed with
Avtron.
FUNCTION
OPERATING VOLTAGE
PHASE B
PHASE A
COMMON
CABLE BELDEN #8723
OR EQUIVALENT
GROUND
M385 SPECIFICATIONS
FOR DIFFERENTIAL APPLICATIONS
+15 V OPERATING VOLTAGE
OUTPUT OPTIONS
OPERATING POWER....................................................... +12 TO +15 VDC ±10%, 55mA (N.L.), 125mA Max.
OUTPUT SIGNAL.............................................................. Two channels (A,B), in quadrature (two phase,
......................................................................................... bidirectional) with complements A,B
PULSES PER REVOLUTION.......................................... 240, 360, 600, 1024, 1200, 2048, 2500 standard.
......................................................................................... Other PPR’s available
WAVE SHAPE................................................................. PHASE A TO PHASE B TRANSITION SEPARATION.. VOLTAGE OUTPUT........................................................ ......................................................................................... M385
Square Wave
15% Minimum
High: Supply Voltage minus 1.6 Volt; -30 mA source
Low: 0.5 Volt Max.; 16mA Sink
FREQUENCY..................................................................... 75 KHz Maximum
MECHANICAL
SPEED RANGE............................................................... STARTING TORQUE....................................................... SHAFT INERTIA.............................................................. ACCELERATION ............................................................ COUPLING RECOMMENDED......................................... ......................................................................................... ......................................................................................... 0 to 3600 RPM (Continuous)
2.2 Oz-In. (Typical)
0.1 Oz-In.2
5,000 RPM/Sec.
Zero Backlash, Thomas Miniature Flexible or
equivalent. Where axial endplay exceeds ±0.020",
use Thomas CCX or equivalent
OPERATING TEMPERATURE.......................................... 0 to 140°F
WEIGHT............................................................................. 9 lbs.
NOTE: AVTRON STANDARD WARRANTY APPLIES. COPIES AVAILABLE UPON REQUEST.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
FUNCTION
N
C&L
T
BLACK
RED
A
B
COM
+V
GREEN
YELLOW
D
G
A
A
PHASE A
PHASE A
BLUE
GRAY
E
H
B
B
PHASE B
PHASE B
COMMON
OPERATING VOLTAGE
CABLE BELDEN #9773
OR EQUIVALENT
GROUND
NOTE: 5' FLEXIBLE CONDUIT STANDARD FOR ALL OUTPUT OPTIONS EXCEPT OPTION L.
M385WDMAC
WIRING CONSIDERATIONS
For bidirectional operation of the pulse generator, proper
phasing of the two output channels is important. Phase A
channel leads phase B channel for clockwise rotation as
viewed from the end-cap (anti-drive) end of the generator.
Interconnecting cables specified in the wiring diagrams
are based on typical applications. Refer to the system
drawing for specific cable requirements where applicable.
Physical properties of cable such as abrasion, temperature, tensile strength, solvents, etc., are dictated by the
specific application. General electrical requirements are:
stranded copper, 22 through 16 gauge, braid or foil with
drain wire, 0.05 µF maximum total mutual or direct capacitance, outer sheath insulator, 1,000 ft. maximum.
ENVIRONMENTAL CONSIDERATIONS
Special attention is to be given to conduit runs, interconnection wiring and NEMA type enclosure mounting. In those applications where ambient temperatures are controlled within
WIRING DIAGRAM
40°F and high humidity/washdown are not present, position
the flexible conduit with a slight sag to prevent any condensation from entering the pulse generator via the conduit.
In harsh environments, which include temperature extremes, high humidity, equipment washdown or atmospheric contamination, extra care is required for interconnection. Follow these steps to reduce potential problems:
FOR SINGLE ENDED APPLICATIONS
1. Always mount connection points, conduit couplings,
junctions boxes, etc., lower than actual generator.
2. Venting of generator is beneficial. One method is to take
conduit run outside of hostile area where practical.
OUTPUT OPTIONS
M385
3. For washdown areas, shroud or otherwise cover the
pulse generator to prevent direct water spray. Do not attach the shroud directly to the generator.
4. Keep conduit outputs and axis of rotation horizontal.
N
C&L
T
RED
BLUE
B
E
+V
B
GREEN
BLACK
D
A
A
COM
5. Purging of pulse generator should be reviewed with
Avtron.
FUNCTION
OPERATING VOLTAGE
PHASE B
PHASE A
COMMON
CABLE BELDEN #8723
OR EQUIVALENT
GROUND
M385 SPECIFICATIONS
FOR DIFFERENTIAL APPLICATIONS
+15 V OPERATING VOLTAGE
OUTPUT OPTIONS
OPERATING POWER....................................................... +12 TO +15 VDC ±10%, 55mA (N.L.), 125mA Max.
OUTPUT SIGNAL.............................................................. Two channels (A,B), in quadrature (two phase,
......................................................................................... bidirectional) with complements A,B
PULSES PER REVOLUTION.......................................... 240, 360, 600, 1024, 1200, 2048, 2500 standard.
......................................................................................... Other PPR’s available
WAVE SHAPE................................................................. PHASE A TO PHASE B TRANSITION SEPARATION.. VOLTAGE OUTPUT........................................................ ......................................................................................... M385
Square Wave
15% Minimum
High: Supply Voltage minus 1.6 Volt; -30 mA source
Low: 0.5 Volt Max.; 16mA Sink
FREQUENCY..................................................................... 75 KHz Maximum
MECHANICAL
SPEED RANGE............................................................... STARTING TORQUE....................................................... SHAFT INERTIA.............................................................. ACCELERATION ............................................................ COUPLING RECOMMENDED......................................... ......................................................................................... ......................................................................................... 0 to 3600 RPM (Continuous)
2.2 Oz-In. (Typical)
0.1 Oz-In.2
5,000 RPM/Sec.
Zero Backlash, Thomas Miniature Flexible or
equivalent. Where axial endplay exceeds ±0.020",
use Thomas CCX or equivalent
OPERATING TEMPERATURE.......................................... 0 to 140°F
WEIGHT............................................................................. 9 lbs.
NOTE: AVTRON STANDARD WARRANTY APPLIES. COPIES AVAILABLE UPON REQUEST.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.
FUNCTION
N
C&L
T
BLACK
RED
A
B
COM
+V
GREEN
YELLOW
D
G
A
A
PHASE A
PHASE A
BLUE
GRAY
E
H
B
B
PHASE B
PHASE B
COMMON
OPERATING VOLTAGE
CABLE BELDEN #9773
OR EQUIVALENT
GROUND
NOTE: 5' FLEXIBLE CONDUIT STANDARD FOR ALL OUTPUT OPTIONS EXCEPT OPTION L.
M385WDMAC
REV. 11-29-00
INDUSTRIAL AUTOMATION, INC.
8901 E. PLEASANT VALLEY RD., INDEPENDENCE, OH 44131, U.S.A. • (216) 642-1230 • FAX (216) 642-6037 • www.avtronencoders.com
INDUSTRIAL AUTOMATION, INC.
OPTION INSTALLATION LOCATION
ALL DIMENSIONS ARE IN INCHES
WITH METRIC EQUIVALENTS IN PARENTHESIS
M385
8 9 0 1 E . P L E A S A N T VA L L E Y R O A D
INDEPENDENCE, OHIO 44131-5508
T E L E P H O N E : ( 1 ) 2 1 6 - 6 4 2 - 1 2 3 0 • FA X : ( 1 ) 2 1 6 - 6 4 2 - 6 0 3 7
E - M A I L : t a c h s @ a v t r o n . c o m • W E B : w w w. a v t r o n e n c o d e r s . c o m
Inactive Design
Replaced by Model AV485
DESCRIPTION
INSTALLATION
The Avtron Model M385 Pulse Generator is a NEMA 56C
face mounted, zero-speed incremental rotary transducer,
designed for industrial environments. When mounted to a
machine shaft, it provides a specific number of electrical
pulses per revolution that are proportional to the shaft’s
rotation. The photoelectric sensing system and electronics
are protected by an O-ring sealed, cast aluminum housing.
Special installation procedures allow operation in particularly dirty environments.
The M385 is designed to face mount to a NEMA 56C accessory flange. A flexible, zero-backlash coupling should be
used to connect to the 5⁄8" steel shaft. Do not subject the
generator’s shaft to axial thrust. The coupling must have the
ability to absorb any shaft endplay.
The M385’s second output option is electrically independent
and totally isolated. For many applications, this feature provides a running spare output by simply interchanging the
military quality output connectors.
The available options for the M385, and how they are indicated in the M385 part number, are shown below:
CAUTION
Do not force or drive the coupling onto the shaft, or
damage to the bearings may result. The coupling
should slide easily on the shaft. Tighten the generator
mounting hardware prior to locking the coupling on
the shaft.
On installations where frequent large temperature swings
occur, and especially where moisture is a problem, special
venting of the housing should be considered. Consult the
factory for specific details.
CAUTION
MODEL STYLE PPR OPTIONS
M385 1 R 1024 B N 15
15
12 TO 15 VDC
C
MS CONNECTOR
L
90° MS CONNECTOR
N
WIRE LEADS
T
TERMINAL BOX
B
BIDIRECTIONAL
PPR (PULSES PER REVOLUTION)
R*
D
M385OPMAC
a- MS3101F18-1P
b- MS3106F18-1S
c-5ft. OF 1/2" FLEXIBLE METAL CONDUIT
FEATURES SUBJECT TO CHANGE WITHOUT NOTICE
3.12
0.6245
0.6250
(15.8623)
(15.8750)
0.13 MAX
(3.30)
4.25 MAX
(107.95)
b
b
2.08
MAX
(52.83)
a
(4.76)
3/16 SQ. KEY
(FURNISHED)
4.500
4.497
(114.300)
(114.224)
AVTRON STANDARD WARRANTY APPLIES. COPIES AVAILABLE UPON REQUEST.
1.28
2.00
3.00
0.38
4.75
5.50
c
c
(22.86)
3/8-16 UNC-2B X 0.90 DP
4 HOLES EQUALLY SPACED
ON A 5.875 DIA. (149.225)
1.094 DIA HOLE FOR
3/4" CONDUIT ENTRY
NEMA
TYPE 12
ENCLOSURE
1.12
2.00
c
"T"
INTERNAL TERMINAL
STRIP PREWIRED
ON GENERATOR SIDE
"N"
WIRE LEADS
FOR
CUSTOMERS
SUPPLIED
JUNCTION BOX
"L"
90˚ ELBOW
MS STYLE
CONNECTIONS
"C"
MS STYLE
CONNECTIONS
OPTION DETAILS
6.60 MAX
(167.64)
Encoder
Instructions
SINGLE OUTPUT
DUAL ISOLATED OUTPUTS
(ONE EACH SIDE)
SINGLE SHAFT (ONLY)
BASIC MODEL NUMBER
R*:RIGHT SIDE AS VIEWED FROM ANTI-DRIVE END
The M385 is often used for speed feedback in drive
systems, where any failure can cause a machine shutdown. While the M385 is designed for continuous mill
operation, it is important to follow proper procedures
with this unit.
REPAIR of defective units requires returning the unit
to the factory, where there is special test equipment.
Turnaround time is minimal, and charges are nominal
for out-of-warranty units.
DO NOT install M385 (or any other rotating equipment)
where liquids will be sprayed or hosed onto them. If
necessary, provide a shield.
DO NOT connect oscilloscope or any instrument common to any pulse generator connection other than
common.