R325P Single Axis Driver User Manual And Commands Guide Version 1.01 RMS Technologies 2533 N. Carson St.
Thank you for purchasing the R325P Single-Axis Step & Direction Driver. This product is warranted to be free of manufacturing defects for one (1) year from the date of purchase. PLEASE READ BEFORE USING Before you start, you must have a suitable step motor, a DC power supply suitable for the motor and a current resistor. The power supply voltage must be between 4 times and 20 times the motor's rated voltage. DISCLAIMER The information provided in this document is believed to be reliable.
R325P User Manual Product: R325P Version: 1.01 Date: 5/29/2013 Version History Version Date Description of Changes 1.00 01/31/2013 New User Manual 1.01 05/29/2013 Updated enable/disable pin description on page 8. R325P User Manual Page 3 of 20 5/29/2013 Version 1.
Table of Contents 1. FEATURES ...........................................................................................5 2. ELECTRICAL SPECIFICATIONS ......................................................................5 3. OPERATING SPECIFICATIONS ......................................................................6 4. MECHANICAL SPECIFICATIONS ....................................................................6 6. CONNECTION SPECIFICATIONS ...........................................................
1. FEATURES • • Single Axis Driver for Bipolar step motors Operates from +12 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.
3. OPERATING SPECIFICATIONS Maximum Step Frequency: Operating Temperature: 2.5 MHz 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. MECHANICAL SPECIFICATIONS Size: 3.00” x 2.75” x 1.42” Weight: 3.2 oz Mounting: Four #6-32 screws, 2.42” x 2.
5. PIN ASSIGNMENTS Mating Connectors P1 Amp P3 Phoenix Contact 640441-3 1803675 P1 – RS485 bus Interface Pin No 1 2 3 P1 Configuration Function A Input (+ve) Ground B Input (-ve) Table 5.1 P1 Connector – Pin 1 Location Image 5.1 P3 – Motor/Controls/Power Interface A 12-pin pluggable terminal strip connector P3 provides power and the step and direction control functions for the module. All of these signals are optically isolated.
CAUTION: Connecting Motor phases (A, A Bar, B, B Bar) to the incorrect location while the R325P is powered will cause the board to burn. Be sure to insert motor phases into Pins 6 through 9, in the order of A, A Bar, B, and B Bar. It is recommended that power is connected last, so that all connections can be checked before power up. 6. CONNECTION SPECIFICATIONS When using the Driver Only portion of the R325P, use the dip switches for step resolution and current settings.
Connecting the Power The R325P requires a supply voltage between 12-48 VDC. First, connect the positive end of the power supply to positive terminal (Pin 12), and then connect the negative of the power supply to the Ground (Pin 11) on the R325P. WARNING! Be careful not to reverse the polarity from the power supply to the driver. Reversing the connection will destroy your driver and void the warranty.
Using the R325P with more than 5V You can choose to supply the optos with the R325P’s internal 5V supply by jumping pins 1 to 4. But if you choose to use more than 5V, for example, a 24V supply and the step pulse train is also a 0 to 24V low-high signal, please use the following recommended resistor to limit the current to 10 mAmps. Note: no resistor will be needed on the actual opto supply line, pin 1.
Hold Current (Percent of Run Current) Function SW5 SW6 0% ON ON 33% OFF ON 66% ON OFF 100% OFF OFF Table 6.4 Function Full Step* 2X 4X 8X 16X 32X 64X 128X 256X Step Resolution SW8 OFF OFF ON OFF ON OFF ON OFF ON Table 6.5 SW7 OFF ON ON ON ON ON ON ON ON SW9 OFF OFF OFF ON ON OFF OFF ON ON SW10 OFF OFF OFF OFF OFF ON ON ON ON *The power must be turned OFF when switching in and out of Full Step mode. 7.
Communicating with the R325P 1. Connect P1 to PC via RS485-232 Converter Card or USB485 Converter Card. 2. Set up HyperTerminal by selecting correct COM port 3. Settings for HyperTerminal is as follows: 57600, 8 bits, None, 1, None 4. The R325P Driver only version allows for changing the hold timeout settings, the amount of mixed decay, and to check the firmware revision level. RS485-232 Converter Card Image 7.1 USB485 Converter Card Image 7.2 R325P User Manual Page 12 of 20 5/29/2013 Version 1.
8. COMMANDS Protocol Syntax Command Format: Example: #
#AHT1000 Sets the Hold Timeout for Driver A to 1000 To query a command use the following format Query Format: # Example: #AFR Queries Driver A for the current Firmware Revision The response would be in the following format Response Format: * Example: *AFR325100 R325P firmware revision 1.00 stand for "Carriage Return" and "Line Feed" respectively.9. Troubleshooting R325P is not functioning correctly Try putting the R325P into TEST mode by placing a jumper on Pins 3 & 4 of J1 as shown below. The motor should twitch back and forth slightly if the R325P is functioning properly. R325P not moving the motor (Step/Dip) Verify that the 5V is being supplied to Pin 1.
10. Appendix A: Recommended Cable Recommended Cable Configurations: DC Supply to Driver Cable length, wire gauge and power conditioning devices play a major role in the performance of your RMS Technologies Driver and Motor. NOTE: The length of the DC power supply cable to the Driver should not exceed 50 feet. Example A – Cabling Under 50 Feet, DC Power Example A demonstrates the recommended cable configuration for DC power supply cabling under 50 feet long.
NOTE: These recommendations will provide optimal protection against EMI and RFI. The actual cable type, wire gauge, shield type and filtering devices used are dependent on the customer’s application and system.
Recommended Cable Configurations: Driver to Motor Cable length, wire gauge and power conditioning devices play a major role in the performance of your Driver and Motor. NOTE: The length of the DC power supply cable between the Driver and the Motor should not exceed 50 feet. Example A demonstrates the recommended cable configuration for the Driver to Motor cabling under 50 Feet long. Correct AWG wire size is determined by the current requirement plus cable length.
* 0.5 MH is a typical starting point for the Common Mode Line Filters. By increasing or decreasing the value of L you can set the drain current to a minimum to meet your requirements.
11. Appendix B: PF Value For applications requiring ultimate smoothness of motion and extreme accuracy, the R325P driver can be programmed via RS485 to change the Percent Fast Decay rate, or, the PF value. The Percent Fast Decay default is 2, or a mixed mode of 48%. Mixed mode is a damping technique done to the driver IC.
• • • PF value 3 Slow speeds Bad waveform • • • PF value 1 Fast speeds Bad waveform R325P User Manual Page 20 of 20 5/29/2013 Version 1.
