Electro-Craft SCA-B4-70-10 User manual

Manual SCA-B4-70-10 V 1.6 01/01 page 1
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
SCA-B4-70-10(70V / 10A)
The servo-amplifier SCA-B4-70-10 is a powerful PWM-module for brushless DC motors with an output
range up to 700 Watt.
Three operation modes are integrated
•Torque-control
•Speed-control by digital-encoder feedback
•Speed-control by hallsensors
The required operation mode is to be selected from the front side of the module by setting jumpers. This
SCA-B4-70-10 servo amplifier is protected against over current overheat and short-circuit of the output
stage against each other or to the power supply. By the usage of advanced technology and power- MOS-
FETs a high efficiency up to 95 %. Due to the wide range of power supply voltage between 11 to 70 V DC
the SCA-B4-70-10 can be used very flexible with different kinds of power supplies within many applications
The robust aluminum case has been constructed for different methods of mounting it, therefor a fast
integration is. screw terminals and a durable controller-design allow a fast and straightforward
commissioning.

Manual SCA-B4-70-10 V 1.6 01/01 page 2
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
contents
1. Safety notes .........................................................................................................................................2
2. specification.........................................................................................................................................3
3. preparing ..............................................................................................................................................3
4. commission..........................................................................................................................................5
5. description of function of inputs and outputs..................................................................................6
6. troubleshooting ...................................................................................................................................9
7. dimensions...........................................................................................................................................9
8. versions of text ..................................................................................................................................10
1. Safety notes
1.1. skilled personnel
installation and commissioning have to be done only by skilled personnel.
1.2. laws
The user has to ensure the correct installation of the servo amplifier and additional equipment
according to valid laws and rules.
1.3. remove load
for first commissioning the motor should run with free shaft which means without load.
1.4. additional safety components
electronic components are not free of failure or damage. Therefore plants have to be installed with
additional device and installation protecting components. A safe and stable state has to be ensured in
the case of damage of some devices, wrong handling, cable disruption and other cases of any kind of
malfunction.
1.5. repairs
repairs have to be done only by authorized distributors or at the manufacturer. Unauthorized opening
and improper repairs of the device may cause danger to the user and the plant.
1.6. danger
care about having no power supply voltage all around the plant during installation of the device.
Never touch any voltage-carrying components
1.7. maximum input voltage
the input power supply voltage must not exceed 70 V DC. Voltages exceeding 70 V or reversed
connection will destroy the unit.
1.8. ESD
do not touch any of the contacts of the device
1.9. EMC
the SCA-B4-70-10 is corresponds to the EC directives,standards and regulations 89/336/EWG article
10 and appendix 1 (EMV) amended by 92/31/EWG and 93/68/EWG and meet the requrements with
standard EN 61800-3 (1996) if the following directions are observed:
•usage of a zinc plated mounting plate, well connected to earth
•mounting of the drive by usage of toothed washers
•usage of shielded cables to and from the unit
•large area contact of the shielding with zinc plated mounting plate.
•motor housing properly connected to earth

Manual SCA-B4-70-10 V 1.6 01/01 page 3
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
2. specification
2.1. electrical data power supply voltage 11- 70 V DC
Current (impulse) 20 A
Current (nominal) 10 A
frequency of power output stage 49 kHz
efficiency 95 %
bandwidth of current controller 2,5 kHz
2.2. inputs set value -10...+10 V
encoder input signals channel A, B; TTL max. 100 kHz
enable enable 8-30 V (high-active)
2.3. outputs current monitor „Monitor I“ 0,5 V / A
speed monitor „monitor n“ 10 V / nmax
supervision output Ready Open Collector max. 30 V DC
auxiliary voltage source –15 V 20mA
auxiliary voltage source +15 V 20 mA
auxiliary voltage source +5 V 100 mA voltage supply for hallsensors and encoder
2.4. display 2-colour LED green: ready red: error
2.5. weight with terminal connector 650 g
2.6. dimensions (LxWxH) 180 x 100 x 40 mm
2.7. temperature-
range operation -10...+45oC
storage -40...+80oC
2.8. humidity range non condensing 20% -80% rel. hum.
3. preparing
Required selection of:
•operating mode
•input for set value
•timing
•phasing
•speed range

Manual SCA-B4-70-10 V 1.6 01/01 page 4
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
3.1. operating mode
operating mode Jumper setting active potentiometers minimal connection of
control inputs
Torque Control 4 Gain; nmax: Imax Offset 6;9-13;17;18
Hall 7;8;9
Encoder 5;6;7 Imax; Offset 6-13;17;18
3.2. connecting diagrams

Manual SCA-B4-70-10 V 1.6 01/01 page 5
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
3.3. input for set value
at use of external potentiometer (min. 10 kOhm) for set value the wiper has to be connected to pin17,
the others to pins 14 and 16. Pin 15 and 18 have to be connected and J 3 is to be removed. at use of
the internal set value via offset potentiometer pin 15 and 18 are left without connection and J3 is to be
set.
3.4. Timing
jumper J2 sets the timing of the hall sensor logic to reach an adaptation to several motor types. The
setting belongs to the direction of the phases. J2 changes the rotation sense of the electrical field.
3.5. Phasing
jumper J1 is for setting the phase shift of the signals of the hall sensors. The correct value is to
provide by the manufacturer of the motor (see datasheet of motor).
3.6. speed range
the speed range is to be set by jumper J10 and J 11. One of four speed ranges is to be set. The best
result of speed control can be reached by setting the lowest acceptable range because of the
resolution.
4. commission
4.1. selection of power supply.
Any power supply can be used as long the minimal requirements listed below are fulfilled. We
recommend to remove the motor from the mechanical construction to avoid damage and danger by
uncontrolled movements of
Requirements to the power supply:
output voltage: min. 11 V DC max. 70 V DC
residual voltage: < 5 %
output current: 10 A nominal, 20 A peak
4.2. funktion of potentiometers
potentiometer function turning ccw turning cw
Gain coarse
gain adjustment decreasing increasing
Gain fine gain adjustment decreasing increasing
N max maximum speed atset value
of 10 V decreasing speed increasing speed
I max
current limitation decreasing min.0,3A increasing max 10 A
Offset
adjustment n=0 at set value = 0 Motor turns cw motor turns ccw
4.3. presetting of potentiometers
original delivered servo amplifiers are adjusted to uncritical values and for easy adjustment by the
user.
4.4. adjustment
Hallcontrol
Digital-Encoderregelung 1. adjust max. set value ( e.g. 10 V ) and turn potentiometer n max cw til the required speed is reached.
2. adjust potentiometer Imax to required value of current limitation.
Important: Refer to motor manufacturer`s data sheet.

Manual SCA-B4-70-10 V 1.6 01/01 page 6
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
3. turn potentiometer Gain slowly cw until the required gain is reached.
Important: If the motor turns rough, is vibrating or makes noise turn
potentiometer ccw again, until the instability of the system is obsolete.
The potentiometers Gain coarse and Gain fine work in an additive way.
4. adjust set value =0V and adjust potentiometer Offset until the motor stops
to speed 0.
Torquecontrol
1. . adjust potentiometer Imax to required value of current limitation. Important: Refer to motor manufacturer`s data sheet.
4.5. commissioning
select the required operating mode by setting the according jumpers on the left side of the unit.
Refer to the printing on the front plate.
Required selection of:
•operating mode
•input for set value
•timing
•phasing
•speed range
connect motor, control inputs e.g. set value, enable and if necessary an additional encoder to the
drive.
connect power supply.
enabling and adjustment referring to manual.
5. description of function of inputs and outputs
In () the pin number
5.1. inputs
5.1.1.Set value (17,18)
the input for set value is internally connected to an differential amplifier.
input range of set value: -10 V...+10 V
input impedance: 20 kOhm
definition of polarity: positive set value (+Set value) > (- Set value)
negative set value(+Set value) < (- Set value)
Input circuit set value:
5.1.2.enable (13)
high potential at the input enable will activate speed/torque control and voltage will be applied to the
motor winding. Leaving this input without connection or pulling it tho GND-potential will result in
disabling the unit.
Input circuit enable:

Manual SCA-B4-70-10 V 1.6 01/01 page 7
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
5.1.3.encoder A (7)
5.1.4.encoder B (8)
the inputs encoder A, B are to be connected to the corresponding outputs of the encoder in operating
mode speed control with encoder feedback.
Input circuit encoder:
5.1.5.Hall A (10)
5.1.6.Hall B (11)
5.1.7.Hall C (12)
Inputs for the Hall effective sensors of the motor. The correct connection regarding phase sequence
and phase relation is essential
Input circuit hall effective sensors:
5.1.8.power gnd (5)
5.1.9.+Vcc (4)
power supply connection.
caution: DO not connect: +Vcc or Power Gnd to the outputs Motor A, B, or C
5.2. outputs
5.2.1.current monitor Monitor I (19)
a current monitor for supervisional purposes is integrated to the servo amplifier. The output provides
an analog signal (voltage) which is proportional to the motor current.
the monitor output is short circuit proof.
Output range: -10 V...+10 V
Output impedance: 10 kOhm
Output proportionality: 0,5V/A
Output circuit current monitor:

Manual SCA-B4-70-10 V 1.6 01/01 page 8
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
5.2.2.speed monitor Monitor n (20)
a speed monitor for supervisional purposes is integrated to the servo amplifier. The output provides
an analog signal (voltage) which is proportional to the motor speed.
It can be used for qualitative weighting of the dynamic of the drive system.
Output range: -10 V...+10 V
Output impedance: 10 kOhm
Output proportionality: 10V at maximum speed
Output circuit speed monitor:
5.2.3.supervision signal Ready / Error (21)
The ready-signal is to show the status of the drive and can be used to provide a feedback signal to
other devices and controls. The open-collector output is normally turned off which means the output is
pulled to a positive level by an external connected resistor, if there is no fault within the drive system.
In the case of a fault like under voltage, overvoltage, overheat or overcurrent the internal transistor is
on, the output is pulled to GND.
Input range max. 30 V DC
load current < 20 mA
any fault is stored and can be reset by enable off and on.
Output circuit ready/error signal:
5.2.4.Motor C (3)
5.2.5.Motor B (2)
5.2.6.Motor A (1)
motor connection.
5.2.7.+ 5 V, 100 mA (6)
auxiliary voltage source for power supply of hallsensors and/or incremental encoder
5.2.8.+ 15 V 20 mA (14)
5.2.9.– 15 V 20 mA (16)
auxiliary voltage source for use as reference voltages by setting the set value by the means of an
external potentiometer

Manual SCA-B4-70-10 V 1.6 01/01 page 9
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
6. troubleshooting
symptom operating mode causes repair
motor
does not
turn
all power supply voltage< 11 V check power supply
enable not active check level at pin 14
set value = 0V check set value
current limitation adjusted too low check potentiometer adjustment I
max
speed range too low check potentiometer adjustment
n max
wrong operation mode check jumper setting
bad connections check connectors
wrong wiring check wiring
no speed
control speed control encoder
feedback
encoder signals check signals and sequence
speed control
hall feedback gain adjusted too low check potentiometer adjustment gain coarse and gain fine
7. dimensions

Manual SCA-B4-70-10 V 1.6 01/01 page 10
ElectroCraft GmbH, Vor dem Lauch 19, D-70567 Stuttgart, Germany
Tel.:[phone], Fax.:[phone] E-mail:[email protected]
8. versions of text
V1.2 (07/99)expanded version
V1.5 (06.00) additional description of input and output signals encoder, set value, error, enable,
monitor. supplementary information of EMC. changed description of function of J2.
V1.6 (01/01) changed description of the error output.