Unidrive SP Low Voltage DC Installation Guide 3
Issue Number: 1 www.controltechniques.com
Contents
1 Safety Information ..........................................................4
1.1 Warnings, Cautions and Notes ................................................................4
1.2 Electrical safety - general warning ..........................................................4
1.3 System design and safety of personnel ..................................................4
1.4 Environmental limits ................................................................................5
1.5 Compliance with regulations ...................................................................5
1.6 Motor .......................................................................................................5
1.7 Adjusting parameters ..............................................................................5
2 Introduction ....................................................................6
2.1 Advantages of Low Voltage DC operation ..............................................6
2.2 Principles of operation .............................................................................6
2.3 Operating modes .....................................................................................7
2.4 Low Voltage DC speed limitation ............................................................7
3 Product information .......................................................9
3.1 Ratings ....................................................................................................9
4 System design ..............................................................11
4.1 Required connections for Low Voltage DC operation ...........................11
4.2 Low Voltage DC power supply ..............................................................11
4.3 Low Voltage DC supply types ...............................................................12
4.4 External softstart resistor .......................................................................12
4.5 Important considerations and information .............................................13
4.6 System configurations ...........................................................................14
4.7 Power circuit control logic and sequencing ...........................................24
4.8 External soft start circuit control ............................................................27
4.9 Running the motor .................................................................................29
5 Component data ...........................................................30
5.1 Fusing ....................................................................................................30
5.2 Discharge resistor and protection ..........................................................32
5.3 Brake resistor ........................................................................................33
5.4 External soft start resistor ......................................................................37
5.5 Blocking diode (D1) ...............................................................................39
5.6 Supply capacitor (C1) ............................................................................39
5.7 Supplier websites ..................................................................................40
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