RMS Technologies R325 DRIVER W/PDT - Manual (Page 5)

RMS Technologies Page 5 Version 1.21
R325 Single Axis Driver Manual 10/1/2007
1. FEATURES
• Single Axis Driver for Bipolar step motors
• Operates from +15 to 48 VDC
• Phase currents from 0.3 to 3.0 Amp Peak
NOTE: Phase current of 2.7 Amp and above REQUIRES an additional heatsink,
make sure the temperature of the bracket does not exceed 45° C.
• Hold current reduction capability with adjustable current and timeout settings
• Selectable Step Resolution from Full Step to 256x Microstepping
• Has three optically isolated control inputs and one optically isolated control
output
• Pole Damping Technology™ integrated within driver board
Dip switches and a RS485 interface are built-in to the R325 Controller. A USB
connection can be used by using the USB485 Converter Card (sold separately).
Pole Damping Technology™
Pole Damping Technology™ (PDT) enhances step motor performance by dampening
each full step in order to create a more accurate and smooth motion profile.
Microstepping the step motor will optimize Pole Damping Technology™. PDT outputs
the correct amount of run and hold currents to the motor, at the right time. Thus, it
will overcome the step motor’s natural tendency to want to forcefully pull towards
the full step ON position.
Optically Isolated Inputs and Output
The default usage of the three optically isolated inputs is Step, Direction and Disable.
The assignment of Disable is fixed; however the other two inputs can be assigned to
other functions as part of software customization. For example one can be used for
Go-Resume and the other for Stop-Quit.
The normal usage of the single optically isolated output is to indicate motion by
sending a pulse every time a step is made.
2. ELECTRICAL SPECIFICATIONS
Supply Voltage: +15 to 48 VDC
Phase Current: 0.3 to 3.0 Amps Peak
NOTE: Phase current of 2.7 Amp and above REQUIRES an additional heatsink,
make sure the temperature of the bracket does not exceed 45° C.
I/O Specifications
3x Optically Isolated Inputs (1 fixed)
1x Optically Isolated Output
Minimum Motor Impedance: 1.5 mH
Note: The drive may behave unpredictably if the motor you are using has an inductance less
than 1.5 mH.