User manual

39
DYNAMIC BRAKING
4 - CONNECTIONS
4.4 Dynamic Braking
The RSi S4 Sensorless Vector Drive is supplied with an integrated dynamic braking (DB) resistor, and is
designed to have adequate dynamic braking for most applications. In cases where short stopping times or
high inertia loads require additional braking capacity, install an external resistor.
z NOTE: Internal DB resistors are connected with fast-on terminals up to Frame size 3.
z NOTE: Consult Benshaw if you are installing external resistors.
To install an external resistor, rst disconnect the internal DB resistor (or resistors in 460 and 600 Vac
models) and properly terminate the wires leading to it. Then connect the external resistor fast-on terminals
where the internal resistor had been connected. Changes to FUN 05 must be made when using external DB
resistors.
Verify with the manufacturer of the selected resistor that the resistor is appropriate for your application.
Contact Benshaw for further assistance with other possible sizing limitations.
z NOTE: It’s recommended to have thermal protection wired back to a digital input to protect the DBR.
Model
Frame
Size
HP KW
Std
Resistance
Qty
Standard
DB
% of
Drive
Min. Allowed
Res.
Max. Peak
Watts
Max.Ext.
DB% of
Drive
1S010* 0 1 .75 125 1 164% 125 1,223 164%
RSi001S42W* 0 1 .75 125 1 164% 125 1,223 164%
RSi002S42W* 0 2 1.5 125 1 82% 125 1,223 82%
RSi003S42W* 0 3 2.2 125 1 55% 125 1,223 55%
RSi005S42W 1 5 3.7 60 1 68% 43 3,555 95%
RSi007S42W 1 7 5.5 60 1 45% 30 5,096 91%
RSi010S42W 2 10 7.5 60 1 34% 27 5,662 76%
RSi015S42W 2 15 11 60 1 23% 20 7,644 68%
RSi020S42W 3 20 15 30 2x60 34% 10 15,288 102%
RSi025S42W 3 25 18 30 2x60 27% 10 15,288 82%
RSi001S44W* 0 1 .75 500 1 163% 270 2,253 302%
RSi002S44W* 0 2 1.5 500 1 82% 270 2,253 151%
RSi003S44W* 0 3 2.2 500 1 54% 270 2,253 101%
RSi005S44W 1 5 3.7 120 2x60 136% 100 6,084 163%
RSi007S44W 1 7 5.5 120 2x60 91% 75 8,112 145%
RSi010S44W 1 10 7.5 120 2x60 68% 75 8,112 109%
RSi015S44W 2 15 11 120 2x60 45% 57 12,944 116%
RSi020S44W 2 20 15 120 2x60 34% 47 12,944 87%
RSi025S44W 2 25 18 120 2x60 27% 47 12,944 69%
RSi030S44W 2 30 22 120 2x60 23% 39 15,600 70%
RSi040S44W 3 40 30 60 4x60 34% 20 30,420 102%
RSi050S44W 3 50 37 60 4x60 27% 20 30,420 82%
RSi060S44W 4 60 45 60 4x60 23% 15 40,560 91%
S4 Dynamic Braking Capacity