Note: The drive may behave unpredictably if the motor you are using has an inductance less than 1.5 mH. R325P User Manual Page 5 of 20 5/29/2013 Version 1.01
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. MECHANICAL SPECIFICATIONS
Size: 3.00” x 2.75” x 1.42”
Weight: 3.2 oz
Mounting: Four #6-32 screws, 2.42” x 2.45”
Plate: Aluminum, Hard Anodized
Figure 3.1 R325P User Manual Page 6 of 20 5/29/2013 Version 1.01
5. PIN ASSIGNMENTS
Mating Connectors
P1 Amp 640441-3
P3 Phoenix Contact 1803675
P1 – RS485 bus Interface
P1 Configuration
Pin No
Function
1
A Input (+ve)
2
Ground
3
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. Open-collector drives are required to provide pulses for Step, levels for Direction, and Disable. The common +ve supply ranges from 5 VDC to 30 VDC with respect to the signal input; however if the supply is greater than 5 VDC then a resistor must be inserted in series with each signal line to limit the current to 10 mA.
P3 Configuration
Pin No
Function
1
Common +ve Externa
Step (in)
3
Direction (in)
4
+5 VDC Internal
5
Disable (in)
6
Motor A+ (out)
7
Motor A- (out)
8
Motor B+ (out)
9
Motor B- (out)
10
Full Step Output
11
Power Ground
12
Power Positive
Table 5.2
P3 Connector – Pin 1 Location
Image 5.2
R325P User Manual Page 7 of 20 5/29/2013 Version 1.01
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.
Using the R325P as a Driver Unit Only
If using the R325P as a Driver only, be sure to connect the power supply last.
Pin 1: Connect Pin 1 to Pin 4 to use the internal +5VDC. By using the internal +5VDC the I/O’s will no longer be optically isolated. If optical isolation is still desired, use a separate +5VDC supply and connect the POSITIVE end of the supply to Pin 1. The NEGATIVE end will connect with the NEGATIVE end of your pulse generator.
Pin 2: Use a pulse generator or function generator to receive pulses into the R325P. Connect the POSTIVE end of the pulse generator to Pin 2. The NEGATIVE end will be connected to the NEGATIVE end of the +5VDC supply if using a separate power source. If using the internal +5VDC supply, connect the NEGATIVE end of the pulse generator to Power GROUND.
Pin 3: To switch the direction of motor rotation, connect Pin 3 with Pin 11, Power Ground. An open or closed connection to Power Ground will change the direction.
Pin 4: This is the internal +5VDC. Use this for testing purposes or if optical isolation of the inputs is not desired. It can output a max of 50 mAmps.
Pin 5: To enable the drive leave this Pin open, disable the drive connect Pin 5 with Pin 11 (Power Ground). An open or closed connection to Power Ground will enable and disable the drive, respectively. A closed connection will remove all power to the output motor leads (Pins 6 through 9).
Pin 6: Phase A Motor Connection
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接头和转接头

Pin 8: Phase B Motor Connection
Pin 9: Phase B Motor Connection
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.
Pin 10: The Full Step output is not available for the basic R325P. This feature is used on the R325PE.
Pin 11: Connect the NEGATIVE of the Power Supply to this terminal.
Pin 12: Connect the POSITIVE of the Power Supply to this terminal. (+12 to 48VDC) R325P User Manual Page 8 of 20 5/29/2013 Version 1.01
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.
Connecting the Motor
WARNING! Make sure the power is OFF when connecting or disconnecting motors from the R325P. Damage will occur if the power is being supplied.
Please refer to your motor documentation for wiring color code.
Connect the corresponding Phase from the motor to the proper pin on the R325P.
Motor Phase P1 Connector