ABB BSM50N User manual

— MN1240_October 2021
October 2021
—
Brushless Servo Motors
Installation and Operating Manual

Any trademarks used in this manual are the property of their respective owners.
Note: Baldor Electric Company, became ABB Motors and Mechanical, Inc. on March 1, 2018.
Nameplates, Declaration of Conformity and other collateral material may contain the company
name of Baldor Electric Company and the brand names of Baldor-Dodge and Baldor-Reliance as
well as the company name of ABB until such time as all materials have been updated to reect our
new corporate identity of ABB.

Table of Contents
Section 1
General Information ............................................. 1-1
Overview .......................................................1-1
Safety Notice ....................................................1-1
Section 2
Installation .................................................... 2-1
Overview .......................................................2-1
Location ...................................................... 2-1
Alignment ......................................................2-1
Receiving .......................................................2-2
Storage ........................................................2-2
Unpacking ......................................................2-2
Handling ........................................................2-2
Repairs.........................................................2-2
Prevent Electrical Noise ............................................2-2
Shaft Loads .................................................... 2-3
Life Determination ................................................2-5
Speed and Torque.................................................2-7
Holding Brake ....................................................2-7
Electrical Connections..............................................2-8
Motor Lead Termination ............................................2-9
Strain Relief (Mounted at Terminal Box).................................2-9
Feedback Termination..............................................2-9
Feedback Devices................................................2-13
Brushless Servo Motor Identification ..................................2-15
iMN1240

ii MN1240

1-1MN1240
Section 1
General Information
Overview
This manual contains general procedures that apply to ABB Motor products.
Be sure to read and understand the Safety Notice statements in this manual.
For your protection, do not install, operate or attempt to perform maintenance
procedures until you understand the Warning and Caution statements.
A Warning statement indicates a possible unsafe condition that can cause harm to
personnel.
A Caution statement indicates a condition that can cause damage to equipment.
Important: This instruction manual is not intended to include a comprehensive listing
of all details for all procedures required for installation, operation and maintenance.
This manual describes general guidelines that apply to most of the motor products
shipped by ABB. If you have a question about a procedure or are uncertain about any
detail, Do Not Proceed.
Please contact your distributor for more information for clarication.
Before you install, operate or perform maintenance, become familiar with the following:
• NEMA Publication ICS16, Motion/Position Control Motors; Controls; and
Feedback Devices.
• The National Electrical Code
• Local codes and Practices
Safety Notice:
This equipment contains high voltage! Electrical shock can cause serious or fatal injury.
Only qualied personnel should attempt installation, operation and maintenance of
electrical equipment. Be sure that you are completely familiar with NEMA publications
ICS16 and MG-2, safety standards for construction and guide for selection,
installation and use of electric motors and generators, the National Electrical Code
and local codes and practices. Unsafe installation or use can cause conditions that
lead to serious or fatal injury. Only qualied personnel should attempt the installation,
operation and maintenance of this equipment.
WARNING: Do not use these motors in the presence of flammable or combustible vapors
or dust. These motors are not designed for atmospheric conditions that require
explosion proof construction.
WARNING: Do not touch electrical connections before you first ensure that power has been
disconnected. Electrical shock can cause serious or fatal injury. Only qualified
personnel should attempt the installation, operation and maintenance of this
equipment.
WARNING: Be sure the system is properly grounded before applying power. Do not apply
power before you ensure that all grounding instructions have been followed.
Electrical shock can cause serious or fatal injury. National Electrical Code and
Local codes must be carefully followed.
WARNING: Avoid extended exposure to machinery with high noise levels. Be sure to wear
ear protective devices to reduce harmful effects to your hearing.
WARNING: The holding brake alone does not guaranty personnel safety. Use structural
measures such as protective fences or a second brake to secure personnel
safety.
WARNING: This equipment may be connected to other machinery that has rotating parts or
parts that are driven by this equipment. Improper use can cause serious or fatal
injury. Only qualified personnel should attempt to install, operate, or maintain
this equipment.

1-2MN1240
Safety Notice Continued
WARNING: Do not by-pass or disable protective devices or safety guards. Safety features
are designed to prevent damage to personnel or equipment. These devices can
only provide protection if they remain operative.
WARNING: Avoid the use of automatic reset devices if the automatic restarting of equipment
can be hazardous to personnel or equipment.
WARNING: Be sure the load is properly coupled to the motor shaft before applying power.
The shaft key must be fully captive by the load device. Improper coupling can
cause harm to personnel or equipment if the load decouples from the shaft
during operation.
WARNING: Use proper care and procedures that are safe during handling, lifting, installing,
operating and maintaining operations. Improper methods may cause muscle
strain or other harm.
WARNING: Servo permanent magnet motors can induce voltage and current in the motor
leads by rotating the motor shaft. Electrical shock can cause serious or fatal
injury. Therefore, do not couple the load to the motor shaft until all motor
connections have been made. During any maintenance inspections, be sure the
motor shaft will not rotate.
WARNING: Before performing any motor maintenance procedure, be sure that the equipment
connected to the motor shaft cannot cause shaft rotation. If the load can cause
shaft rotation, disconnect the load from the motor shaft before maintenance is
performed. Unexpected mechanical rotation of the motor parts can cause injury
or motor damage.
WARNING: Disconnect all electrical power from the motor windings and accessory devices
before disassembly of the motor. Electrical shock can cause serious or fatal
injury.
WARNING: Ensure all electrical connections are securely made. High voltage may be present
and high motor speeds may result from a broken connection.
WARNING: Pacemaker Danger − Magnetic and electromagnetic fields in the vicinity of
current carrying conductors and permanent magnet motors can result in a
serious health hazard to persons with cardiac pacemakers, metal implants and
hearing aids.
WARNING: Dangerous movements can occur when a motor is improperly connected or
a fault occurs. Be careful during start−up, troubleshooting and maintenance
procedures to avoid injury.
WARNING: Severe burn is possible. The motor winding can reach 155 degrees C during
operation. Do not touch motor without protective clothing or allow sufficient
time for motor to cool to avoid burns.
Caution: To prevent premature equipment failure or damage, only qualified maintenance
personnel should perform maintenance.
Caution: Do not lift the motor and its driven load by the motor lifting hardware. The motor
lifting hardware is adequate for lifting only the motor. Disconnect the load from
the motor shaft before moving the motor.
Caution: To prevent equipment damage, be sure that the control is fused for the maximum
motor rated amps listed on the rating plate.
Caution: If a HI POT test (High Potential Insulation test) must be performed, follow
the precautions and procedure in NEMA MG-1 and MG-2 standards to avoid
equipment damage.
Caution: Do not perform dielectric withstand tests on any feedback device or motor
control as damage may result.
Caution: Motor housings get very hot during normal operation. Do not touch the motor
after use until it has had sufficient time to cool. Severe burns may result from
touching the motor after use.
Caution: Do not use the holding brake to stop motion. This will cause premature brake
wear and failure. The brakes are not designed to stop a rotating load. The servo
drive inputs should always be used to stop motor shaft rotation.
Caution: The AC servo motor is not intended to be connected directly to the AC mains. Do
not connect AC Mains directly to BSM AC Servo Motors.
If you have any questions or are uncertain about any statement or procedure, or
if you require additional information please contact your ABB respresntative or an
Authorized ABB Service Center.

1-3MN1240

2-1 MN1240
Section 2
Installation
Overview
Installation should conform to the National Electrical Code as well as local codes
and practices. When other devices are coupled to the motor shaft, be sure to install
protective devices to prevent accidents. Some protective devices include, coupling,
belt guard, chain guard, shaft covers etc. These protect against accidental contact
with moving parts. Machinery that is accessible to personnel should provide further
protection in the form of guard rails, screening, warning signs etc.
Location
The motor should be installed in an area that is protected from direct sunlight,
corrosives, harmful gases or liquids, dust, metallic particles, and vibration. Exposure
to these can reduce the operating life and degrade performance. Be sure to allow
clearance for ventilation and access for cleaning, repair, service and inspections.
Ventilation is extremely important. Be sure the area for ventilation is not obstructed.
Obstructions will limit the free passage of air. Motors get warm and the heat must
be dissipated to prevent damage. These motors are not designed for atmospheric
conditions that require explosion proof operation. They must NOT be used in the
presence of ammable or combustible vapors or dust. The motor must be securely
installed to a rigid foundation or mounting surface to minimize vibration and maintain
alignment between the motor and shaft load. Failure to provide a proper mounting
surface may cause vibration, misalignment and bearing damage. For mounting
dimensions, refer to http://www.baldor.com/products/servo_motors.asp and provide
adequate clearance.
Alignment
Accurate alignment of the motor with the driven equipment is extremely important.
1. Direct Coupling
For direct drive, use exible couplings if possible. Consult the drive or equipment
manufacturer for more information. Mechanical vibration and roughness during
operation may indicate poor alignment. Use dial indicators to check alignment. The
space between coupling hubs should be maintained as recommended by the coupling
manufacturer.
2. End-Play Adjustment
The axial position of the motor frame with respect to its load is also extremely
important. The motor bearings are not designed for excessive external axial thrust
loads. Improper adjustment will cause failure.
Figure 2-1 Mounting Orientation
These mounting orientations
are allowed.

2-2MN1240
Receiving
Each ABB Motor is thoroughly tested at the factory and carefully packaged for
shipment. When you receive your motor, there are several things you should do
immediately.
1. Observe the condition of the shipping container and report any damage
immediately to the commercial carrier that delivered your motor.
2. Verify that the part number of the motor you received is the same as the part
number listed on your purchase order.
Storage
If the motor is not put into service immediately, the motor must be stored in a clean,
dry and warm location. If the parts are not put into service immediately, store them
in a clean, dry and warm location. The motor must be protected from moisture and
condensation. Storage area should be a dust free environment, maintained −25 degC
to +85 degC and less than 90% relative humidity non−condensing.
Unpacking
Each ABB motor is packaged for ease of handling and to prevent entry of contaminants.
1. To avoid condensation inside the motor, do not unpack until the motor has
reached room temperature. (Room temperature is the temperature of the room
in which it will be installed). The packing provides insulation from temperature
changes during transportation.
2. When the motor has reached room temperature, remove all protective wrapping
material from the motor.
Handling
Use proper care and procedures that are safe during handling, lifting, installing,
operating and maintenance operations. Improper methods may cause muscle strain
or other harm.
Repairs
ABB will not share any responsibility for damage caused by customer attempt to
repair or modify a motor. Consult ABB for any service.
Prevent Electrical Noise
Electro-Magnetic-Interference (EMI), commonly called “electrical noise” may adversely
affect motor performance by introducing stray signals. Effective techniques to reduce
or prevent EMI include AC power lters, cable shielding, separating signal wires from
power wires and good grounding techniques.
Effective AC power ltering can be achieved by using properly installed “Isolated AC
Power Transformers” or “AC Line Filters”. Other techniques are:
• Install motor cables and signal wires in separate conduits.
• Do not route motor cables and signal wires in parallel. Separate cables by at
least 1 foot for every 30 feet of run.
• Cross signal and power wires at 90 degree angles to prevent inductive noise
coupling.
• Do not route signal wires over the vent openings of the servo drives.
• Ground all equipment using a single point ground system.
• Keep wires as short as possible.
• Ground both ends of the encoder cable and use twisted pair wires.
• Use shielded motor cables to prevent EMI from other equipment.

2-3 MN1240
Shaft Loads
The motors can be damaged by excessive shaft loads. This may shorten the motor’s
service life. The motor warranty is also voided for excessive shaft load related failures.
The maximum allowable radial force (Fradial max ) depends on the shaft load. It is
determined by (distance x force) and the output shaft design (plain shaft or shaft with
keyway). When motor shaft has both a radial load and an axial load, axial load rating
= 44% of radial load rating listed.
Figure 2-2 Radial Load Capacity
(Radial Force)
Notes:
1) Solid lines are based on L10 = 20,000 hours.
2) Dashed lines are based on 104load peaks
at 110% of rated torque.

2-4MN1240
Figure 2-3 Radial Load Capacity Continued
BSM132
1
20 40 60 80 100 120 140
2 3 45 0
DISTANCE"X"(mm)
0
0
)N(ECROF
).SBL(ECROF
80 160 240 320 400 480 560
320 640 1280 1600 1920
0
DISTANCE"X"(INCHES)
960 2240
5
0
0
0
R
P
M
2
8
0
0
R
P
M
BRUSHLESS SERVO MOTORS
THRUST LOAD CAPACITIES
40
THRUSTLOAD–N
THRUSTLOAD–LBS.
80 120 200 400 600
150 800 1000 1500 2000 4000
10 20 30 50 100 200
40 300 400 500 1000
1 1.5 2 3 4 5 6 7 8 9 10
BSM50
BSM63
BSM80
BSM90
BSM100
BSM132

2-5 MN1240
Life Determination
How Life is Determined
A life estimate is a calculated, statistical expectancy and is dened as the length
of time, or the number of revolutions, until fatigue develops. This life depends on
many different factors such as loading, speed, lubrication, operating temperature,
contamination, plus other environmental factors. It’s impossible to predict precisely.
Statistical calculation estimates are based upon L10 life. This is the life that 90 percent
of a group, of apparently identical parts, will reach or exceed. Typical bearing radial
load capacity curves presented in the literature are based upon bearing L10 life of
20,000 hours.
Using the Curves
First determine your load (or force), location (or distance) from the bearing the load will
be applied, and speed (or RPM). Second, plot these points on the curve. For example,
using the BSM80 (Figure 2-4) a force of 80 lbs (352 N), applied 1 inch (25mm) from the
bearing, with a motor speed of 2,000 RPM, would relate to a bearing L10 life estimate
of 20,000 hours.
Figure 2-4
(Radial
Force)
Operating 24 hours / day, results in approximately 8500 hours per year. This would
provide a L10 life estimate of: (20,000 hours) / (8500 hours/yr)=2.35yrs.
If Plotted Point Does Not Match your RPM
Many times the point plotted (force and distance), is not specically on your
applications speed curve, so an estimate for life is calculated as follows:
L10
16667
SxC
F
3
Where: L10 = 20,000 hours
S = RPM
C = capacity of system
F = Force or Load (lb)
Example: Provide an estimate L10 life for a BSM90 motor with a radial load or force of
130 lbs (570 N) located 3” (76mm) from the bearing. Operating speed is 1000 RPM.
1. Determine the systems capacity − at the distance for our application. To
do this, refer to Figure 2-5 and read information from the curve:
a. Locate our distance (3”) on the X axis.
b. Pick a speed (8,000 RPM) and locate the intersect with the 3”.
c. Read the force (100 lbs) on the Y axis.

2-6MN1240
Figure 2-5 BSM90 Load Capacity Curves
(Radial Force)
Step 1a
Step 1b
Step 1c
d. Next, insert these numbers into equation (1) above and solve for
capacity “C” (round off for clarity):
L10
16667
SxC
F
316 x 103
8 x103xC
100
3
20, 000 16667
8000 xC
100
3
C 2125
2. Now that capacity is known, it is possible to estimate L10 with the
applications load of 130 lbs (570 N) and 1000 RPM.
L10
16667
SxC
F
316 x 103
1 x103x2125
130
3
72, 795 hours
This relates to 72,795 hours / 8500 hours/yr = 8.56 years.
Conclusion
Life is a statistical calculation based upon 90 percent of identical parts
reaching or exceeding an estimate. It depends on many different factors and
is impossible to predict precisely, however calculations provide a guideline.
Motor Poles
BSM50/63/80 Series motors are 4 pole (2 pole pair)
BSM 90/100/132 Series motors are 8 pole (4 pole pair)

2-7 MN1240
Speed and Torque
The speed−torque curves for a motor show the safe operating area, speed limit area
and intermittent operating area. These curves are used to determine the maximum
useable speeds with known torque requirements.
If operating within the continuous area, the motor’s thermal limit will not be exceeded.
If operated within the intermittent area (extended operation in this area will cause
the motor to overheat), the operating time in this area must be limited to prevent
overheating.
Brushless servo motors are rated at an ambient of 25 degrees C and a temperature
rise of 130 degrees C. For operation at 40 degrees C derate by 8%.
WARNING: Severe burn is possible. The motor winding can reach 155 degrees C during
operation. Do not touch motor without protective clothing or allow sufficient
time for motor to cool to avoid burns.
Figure 2-6 Typical Speed−Torque Curve
Peak current
capability of the motor
Continuous current
required by the applicationRequired speed for
the application
Maximum Motor Speed Capability
Continuous Torque at speed
for the application
Intermittent Area
Continuous Area
Holding Brake
Holding brakes are offered as options for servo motors. These brakes are designed
to hold the motor shaft at 0 RPM (to rated brake holding torque). The purpose of
the holding brake is to hold the servo axis when power to the machine is turned off.
The holding brake uses the “electric release” principle. Applying 24VDC to the brake
causes the brake to release and lets the motor shaft rotate. Loss of power causes the
brake to hold the motor shaft. The machine controller controls the holding brake. This
ensures correct On and Off switching sequence.
WARNING: The holding brake alone does not guarantee personnel safety. Use structural
measures such as protective fences or a second brake to secure personnel
safety.
Caution: Do not use the holding brake to stop motion. This will cause premature brake
wear and failure. The brakes are not designed to stop a rotating load. The servo
drive inputs should always be used to stop motor shaft rotation.

2-8MN1240
Table 2-1 Brake Specifications
Brake data for BSM and SSBSM
Motor
Code
Brake
Holding
Torque Nm
(lb-in)
Watts Brake
voltage
(Vdc)
Brake
current
(amps)
Set
Time
(ms)
Release
Time
(ms)
Brake inertia
Kg-cm²
(lb-in-s²)
BSM50N 1.1 (10) 12.4 24 0.52 3 20 0.019 (0.000017)
BSM63N 2 (18) 17 24 0.71 16 43 0.018 (0.000016)
BSM80 4.5 (40) 17 24 0.71 9 48 0.125 (0.000111)
BSM90 15.8 (140) 22 24 0.92 14 110 0.181 (0.00016)
BSM100 39.5 (350) 19 24 0.79 22 195 0.723 (0.00064)
BSM25C 1.7 (15) 9.6 24 0.4 16 27 0.034 (0.00003)
BSM33C 15.8 (140) 21.6 24 0.9 14 110 0.181 (0.00016)
BSM132C 101.7 (900) 76 24 3.17 129 163 17.277 (0.01529)
Note: All standard brakes used on BSM motors are 24 Vdc. The application needs to provide this voltage to release
the brake. The brake is a safety brake only and not intended to be used to decelerate loads. Contact ABB for details.
Detailed engineering drawings are available upon request.
Electrical Connections
Overview Figure 2-7 shows typical connections to a control. Note all wiring should be
600volts.
Figure 2-7 Typical Connections to Motor Control
AC MotorU
V W
G
Control
Feedback
Motor
Holding
Brake
Motor
Temperature
Switch
Shielded
Twisted Pair Wire
Shielded
Twisted Pair Wire
Feedback
Connector
Motor
Connector
Motor Ground Wire
Motor Temperature Input
Holding Brake Connector
Single Point Ground
Shielded Motor Cable
All wiring should have 600V rated insulation.

2-9 MN1240
Motor Lead Termination
Motor leads are normally terminated using a Connector or Terminal Box (see Figure
2-8) or Flying Leads. When no termination is provided and the motor leads just exit
the motor housing, this is called “Flying Leads”. For ying leads, refer to the motor
packing list to determine the lead conguration.
Figure 2-8 Motor Termination
Function Pin 8 Pin Function Pin
1 2
UVW
3 4
Thermal Switch
Thermal Switch
Brake
Brake
U
Ground
W
V
A
B
C
D
1
2
3
4
1
D
2
3
4
CB
A
Thermal Switch
Thermal Switch
Brake
Brake
U
W
V
Ground (P.E.)
1
2
3
4
U
V
W
Screw
Connector Termination Terminal Box Termination
Strain Relief (Mounted at Terminal Box)
ThemotorcableisterminatedattheTerminalBoxusingaShieldedStrainReliefConnector.
Figure 2-9 shows the components.
1. Strip the outer shield from the cable to expose the conductors and shield.
2. Slip the Strain Relief components onto the cable in the order shown.
3. Fold the Shield wires over the end of the Contact Carrier.
4. Slide the Threaded Adapter onto the Contact Carrier until the Carrier is
completely inserted into the Adapter.
5. Slide the Gasket into the Contact Carrier.
6. Slide the Adapter Cover onto the Threaded Adapter and Tighten. As it is
tightened, it compresses the Gasket against the Cable to form the strain
relief and securely hold the cable.
7. The assembly can be inserted into the Terminal Box and secured.
Figure 2-9 Motor Cable Strain Relief Assembly
Threaded
Adapter
Gasket Adapter
Cover
Contact
Carrier
Shielded Cable Assemble Parts onto Cable
Assembled
Fold Shield wires over Contact Carrier
Feedback Termination
Connections for Feedback cables are different for each type of feedback device.
Standard devices are: Resolver, Halls (Hall Effect), Incremental Encoder with Halls,
and Absolute Encoders including SSI, EnDat, BiSS, and Hiperface.
Custom feedback devices are also available. Request a drawing of your feedback
device to determine the pin−out and/or wire color codes.

2-10MN1240
Figure 2-10 Typical Connections to Feedback Termination
Motor-Resolver
BSMxxx-xxxxA Motor-Incremental encoder BSMxxx-xxxxF or E
Terminal block Power connections
BSM 90/100 Terminal block Power connections BSM 90/100
1 2 3 4
UV W
Ground
boss
Post Function
1 Thermal switch
2 Thermal switch
3 Brake (optional)
4 Brake (optional)
U1 Motor lead U
V2 Motor lead V
W3 Motor lead W
Screw Ground
1 2 3 4
UV W
Ground
boss
Post Function
1 Thermal switch
2 Thermal switch
3 Brake (optional)
4 Brake (optional)
U1 Motor lead U
V2 Motor lead V
W3 Motor lead W
Screw Ground
Standard and rotatable
connectors
Power connections
BSM 50/63/80 and SSBSM
Standard motor
connector
Power connections
BSM 50/63/80 and SSBSM
A
BC
D
1
2
3
4
Post Function
A Thermal switch
B Thermal switch
C Brake (optional)
D Brake (optional)
1 Motor lead U
2 Ground
3Motor lead W
4Motor lead V
A
BC
D
1
2
3
4
Post Function
A Thermal switch
B Thermal switch
C Brake (optional)
D Brake (optional)
1 Motor lead U
2 Ground
3Motor lead W
4Motor lead V
Standard and rotatable
connectors
12 Pin
Resolver connections
BSM and SSBSM
Standard encoder
connector
16 Pin
Encoder connections
BSM and SSBSM
1 9 8
2 10 1 2 7
3 11 6
4 5
Post Function
1 REF HI R1
2 REF LO R2
3 COS+ S1
4 COS- S3
5 SINE- S4
6 SINE+ S2
7-12 No connection
1
2
3
4
5
6
7
8
9
10
11
12
1316
15 14
Post Function
1 DC + 5V
2 Ground
3Channel A
4 Channel A
5 Channel B
6 Channel B
7 Channel Z
8 Channel Z
9 Open
10 Channel U
11 Channel U
12 Channel V
13 Channel V
14 Channel W
15 Channel W
16 No connection
Note: For BSM 50/63/80 (and option on BSM90/100), the standard and rotatable power connector is rated at 28 amps.
BSM brakes are not polarity sensitive.

2-11 MN1240
Figure 2-10 Typical Connections to Feedback Termination
Motor-BiSS
BSMxxx-xxxxB or B2
Motor-EnDat
BSMxxx-xxxxD2 or D
Terminal block Power connections
BSM 90/100 Terminal block Power connections BSM 90/100
1 2 3 4
UV W
Ground
boss
Post Function
1 Thermal switch
2 Thermal switch
3 Brake (optional)
4 Brake (optional)
U1 Motor lead U
V2 Motor lead V
W3 Motor lead W
Screw Ground
1 2 3 4
UV W
Ground
boss
Post Function
1 Thermal switch
2 Thermal switch
3 Brake (optional)
4 Brake (optional)
U1 Motor lead U
V2 Motor lead V
W3 Motor lead W
Screw Ground
Standard and rotatable
connectors
Power connections
BSM 50/63/80 and SSBSM
Standard motor
connector
Power connections
BSM 50/63/80 and SSBSM
A
BC
D
1
2
3
4
Post Function
A Thermal switch
B Thermal switch
C Brake (optional)
D Brake (optional)
1 Motor lead U
2 Ground
3Motor lead W
4Motor lead V
A
BC
D
1
2
3
4
Post Function
A Thermal switch
B Thermal switch
C Brake (optional)
D Brake (optional)
1 Motor lead U
2 Ground
3Motor lead W
4Motor lead V
Standard BiSS
connector
12 Pin
BiSS connections
BSM and SSBSM
Standard EnDat
connector
12 Pin
EnDat connections
BSM and SSBSM
1 9 8
2 10 1 2 7
3 11 6
4 5
8Post Function
1DATA-
2 A+ (SIN+)
3 OV sensor
4 B+ (COS+)
5 Clock-
6 –
7 Clock+
8 B- (COS-)
9 5V & up sense
10 OV DGND
11 A- (SIN-)
12 DATA+
1 9 8
2 10 1 2 7
3 11 6
4 5
Post Function
1DATA-
2SIN A+
3 OV sensor
4 COS B+
5 Clock-
6 5V sensor
7 Clock+
8 COS B-
9 +5V
10 DGND
11 SIN A-
12 DATA+
Note For BSM 50/63/80 (and option on BSM90/100), the standard and rotatable power connector is rated
at 28 amps.
BSM brakes are not polarity sensitive.

2-12 MN1240
Figure 2-10 Typical Connections to Feedback Termination
Motor-SSi
BSMxxx-xxxxS1 or S2
Motor-Hiperface
BSMxxx-xxxxD3 or D4
Terminal block Power connections
BSM 90/100 Terminal block Power connections BSM 90/100
1 2 3 4
UV W
Ground
boss
Post Function
1 Thermal switch
2 Thermal switch
3 Brake (optional)
4 Brake (optional)
U1 Motor lead U
V2 Motor lead V
W3 Motor lead W
Screw Ground
1 2 3 4
UV W
Ground
boss
Post Function
1 Thermal switch
2 Thermal switch
3 Brake (optional)
4 Brake (optional)
U1 Motor lead U
V2 Motor lead V
W3 Motor lead W
Screw Ground
Standard motor
connector
Power connections
BSM 50/63/80 and SSBSM
Standard motor
connector
Power connections
BSM 50/63/80 and SSBSM
A
BC
D
1
2
3
4
Post Function
A Thermal switch
B Thermal switch
C Brake (optional)
D Brake (optional)
1 Motor lead U
2 Ground
3Motor lead W
4Motor lead V
A
BC
D
1
2
3
4
Post Function
A Thermal switch
B Thermal switch
C Brake (optional)
D Brake (optional)
1 Motor lead U
2 Ground
3Motor lead W
4Motor lead V
Standard SSI
connector
12 Pin
SSI connections
BSM and SSBSM
Standard hyperface
connector
12 Pin
Hyperface connections
BSM and SSBSM
1 9 8
2 10 1 2 7
3 11 6
4 5
Post Function
1 +Vs (5Vdc)
2 OV
3 SSI clock
4 SSI clock
5 SSI DATA
6 SSI DATA
7 –
8 –
9 Connected to
pin 1
10 –
11 –
12 –
1 9 8
2 10 1 2 7
3 11 6
4 5
Post Function
1DATA-
2 +SIN
3 Open
4 +COS
5 OPEN
6 OPEN
7 OPEN
8 REF COS
9 US 7-12V
10 GND
11 REF SIN
12 DATA+
Note For BSM 50/63/80 (and option on BSM90/100), the standard and rotatable power connector is rated
at 28 amps.
BSM brakes are not polarity sensitive.

2-13MN1240
Feedback Devices
Resolver
Common feedback devices for ABB BSM servo motors include Resolver, Incremental
Encoder, and Absolute Encoders. Custom feedback devices are also available.
Contact ABB for more information.
Figure 2-10 Typical Resolver Feedback Device
Waveform 1
8 Pole Motor and
2 Pole Resolver
Waveform 2
4 Pole Motor and
2 Pole Resolver
R1
Red/
White
R2
Yel/
White
S2
Yel
S4
Blu
S1
Red
S3
Blk
Resolver Schematic Diagram
Power Source AC 10Vrms 4.5kHz
Primary Element Rotor
Electrical Error±7%
Transformation Ratio 0.5 ±10%
Phase Shift ±8°nominal
Accuracy Spread 12 ARC minutes
Input Impedance ZRO 90 + j180 Ωnominal
Output Impedance ZSO 220 + j350 Ω@ 0°(S1−S3)
ZSS 210 + j300 Ω@ 0°(S1−S3)
DC Resistance Rotor 46 ΩREF
Stator 120 ΩREF
Dielectric Strength AC 500 volts, 1 minute 60/50 Hz
Insulation Resistance 100M ΩMinimum DC 500Volts
Weight 0.18kg Maximum
Maximum Operating Speed 10,000 RPM
Operating Temperature Range −55°C to +150°C
Resolver Specication
L2=Motorlead L2 (V)
L3=Motor lead L3 (W)
L2−L3 Generated Voltage
Cosine Signal
L2−L3 Generated Voltage
Cosine Signal
(Primary) (Secondary)