RMS Technologies
Page 6
Version 1.20
R325I Single Axis Controller/Driver Manual
02/13/2006
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.
3. OPERATING SPECIFICATIONS
Maximum Step Frequency:
2.5 MHz
Operating Temperature:
Low end – 0
°
C
High end – Dependent on case temperature,
bracket temperature must not exceed 45° C
Automatic Motor Holding Current reduction available from 0.3 to 2.5 Amps
Logic Timing
Minimum Step Pulse Width
200 nanoseconds
Minimum Step Low Time
200
nanoseconds
Maximum Power-Down Recovery Time
20 milliseconds
4. COMMUNICATION SPECIFICATIONS
Address bytes in the RS485 commands allow multiple units (32 units max) to be
controlled from a single host port.
Interface Type
RS485
Baud Rate
57600 bits per second (bps)
# Bits per character
8 data bits
Parity
None
Stop
Bit 2
Flow
Control
None