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MMP SA-2550A 

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Midwest Motion Products 

DESIGN, MANUFACTURING & DISTRIBUTION  -  MOTION CONTROL EQUIPMENT 

www.midwestmotion.com

         email:  

[email protected]

 

 

 

 

BLOCK DIAGRAM 

 

 

 

 

 
Note that the above diagram is for a brushless motor with Hall effects and with or without an encoder. If you have purchased other hardware to run 

with the amplifier then the above wiring scheme does not apply. Contact MMP for more details. 
 
 
 
 
 

Information on Approvals and Compliances 

 

 

US and Canadian safety compliance with UL 508c, the industrial standard for power conversion 
electronics. UL registered under file number E140173. Note that machine components compliant 
with UL are considered UL registered as opposed to UL listed as would be the case for 
commercial products. 

 

 

Compliant with European EMC Directive 2004/108/EC on Electromagnetic Compatibility 
(specifically EN 61000-6- 4:2007 for Emissions, Class A and EN 61000-6-2:2005 for Immunity, 
Performance Criteria A). LVD requirements of Directive 2006/95/EC (specifically, EN 60204-
1:2004, a Low Voltage Directive to protect users from electrical shock). 

 

 

The RoHS II Directive 2011/65/EU restricts the use of certain substances including lead,  mercury, 
cadmium, hexavalent chromium and halogenated flame retardants PBB and PBDE in electronic 
equipment. 

 

MIDWEST M

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TION

 P

RODUCTS

 

Summary of Contents for SA-2550A

Page 1: ...nsors or a tachometer for velocity control Continuous Current 25 A Supply Voltage 20 80 VDC Features Four Quadrant RegenerativeOperation DIP Switch Selectable Modes DIP Switch Configurable Loop Tuning...

Page 2: ...Regenerative Braking with the Servo Amplifier 13 Loop Tuning Switch Functions 16 Mechanical Information 17 Mounting Dimensions 18 Troubleshooting Guide Red LED Causes and Solutions 19 Current Loop Tun...

Page 3: ...on electronics UL registered under file number E140173 Note that machine components compliant with UL are considered UL registered as opposed to UL listed as would be the case for commercialproducts C...

Page 4: ...pported Three Phase Brushless Single Phase Brushed Voice Coil Inductive Load Hardware Protection Over Current Over Temperature Over Voltage Under Voltage Short Circuit Phase Phase Phase Ground Primary...

Page 5: ...ve SW1 2 ON Pull to ground to enable drive SW1 2 OFF Inhibit turns off all power devices I 10 V HALL 30mA OUT Low Power Supply For Hall Sensors 6 V 30 mA Referenced to signal ground Short circuit prot...

Page 6: ...feedback polarity may be required to prevent a motor run away condition Standard Inverted 8 Mode Selection See mode selection table below 9 Reserved 10 60 120 degree commutation phasing setting 120 d...

Page 7: ...5 OFF ON OFF ON OFF ON OFF ON SW4 6 OFF OFF ON ON OFF OFF ON ON SW4 7 OFF OFF OFF OFF ON ON ON ON Peak and Continuous Current Scaling Table Default switch settings are shaded Switch Peak and Continuo...

Page 8: ...nd output current to the motor phases are the same amplitude Due to the nature of the MMP SA 2550A the input and output currents usually correlate but are not always equal To ensure the motor is recei...

Page 9: ...ecifications table page 4 As long as the input frequency is no less than 10 Hz and does not exceed the maximum frequency the servo amplifier is able to control speed smoothly Typically an encoder reso...

Page 10: ...VDC is used in place of a potentiometer then wire as shown below Remove connection to P1 1 and connect the signal positive to pin 5 for 0 100 POT effect Ensure VCOM is grounded to P1 2 Figure 2 Encode...

Page 11: ...toward the outside of the servo amplifier as shown in the picture below Note Make sure to disconnect all Hall sensor inputs Figure 1 120 60 Phasing Switch Example Motor Connections With the 120 60 PHA...

Page 12: ...P1 4 FWD 0 100 CW P1 1 P1 2 P1 4 REV 0 100 CW P1 3 P1 2 P1 5 REV 0 100 CW P1 2 P1 3 P1 4 FWD 100 0 CCW P1 2 P1 1 P1 5 FWD 100 0 CCW P1 2 P1 1 P1 4 REV 100 0 CCW P1 2 P1 3 P1 5 REV 100 0 CCW Assumes th...

Page 13: ...egenerated energy can charge the power supply capacitors to levels above that of the drive over voltage shutdown level If the power supply capacitance is unable to handle this excess energy or if it i...

Page 14: ...load J m mass of the load kg g gravitational acceleration 9 81 m s2 h vertical height of the load m During regeneration the kinetic and potential energy will be stored in the power supply s capacitor...

Page 15: ...y the for a shunt regulator by operating the servo drive under the worst case braking and deceleration conditions If the drive shuts off due to over voltage a shunt regulator is necessary Continuous R...

Page 16: ...OFF OFF ON ON OFF OFF ON ON OFF OFF SW3 3 ON ON ON ON OFF OFF OFF OFF ON ON ON ON OFF OFF OFF OFF SW3 4 ON ON ON ON ON ON ON ON OFF OFF OFF OFF OFF OFF OFF OFF SW3 5 ON ON ON ON ON ON ON ON ON ON ON...

Page 17: ...e Yes 15 VEL MONITOR OUT 13 HALL 2 11 GND 9 INHIBIT ENABLE 7 ENCODER A IN 5 REF IN 3 10V 3mA OUT 1 10V 3mA OUT 2 SIGNAL GND 4 REF IN 6 ENCODER B IN 8 CURRENT MONITOR 10 V HALL 30mA OUT 12 HALL 1 14 HA...

Page 18: ...SA 2550A Page 18 of 24 Midwest Motion Products DESIGN MANUFACTURING DISTRIBUTION MOTION CONTROL EQUIPMENT www midwestmotion com email sales midwestmotion com MOUNTING DIMENSIONS MIDWEST MOTION PRODUC...

Page 19: ...using a brushless motor connect Hall sensor inputs and set the 60 120 phasing switch to the correct position according to the motor Apply power to the drive and rotate the motor by hand If the LED is...

Page 20: ...ce in the table below 60 Degree 120 Degree 60 Degree 120 Degree Hall A Hall B Hall C Hall A Hall B Hall C 1 0 0 1 0 0 1 1 0 1 1 0 1 1 1 0 1 0 Valid 0 1 1 0 1 1 Green 0 0 1 0 0 1 LED 0 0 0 1 0 1 1 0 1...

Page 21: ...ower ground and AC ground Make sure the motor phases are not shorting to AC ground through the motor housing or shielding on the motor power cable Over current An over current fault will occur if comm...

Page 22: ...near the drive s upper voltage limit Low power supply voltage power supply voltage is near the drive s lower voltage limit To perform current loop tuning first locate the relevant potentiometer POT 1...

Page 23: ...tiometers are preset the correlation of command voltage to motor speed may result in less control of motor speed then desired A typical command curve would appear as below if potentiometer at full CCW...

Page 24: ...mail sales midwestmotion com The respective potentiometers have the following effects on the command curve As noted in the Potentiometer Functions table on page 6 each potentiometer has approximately...

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