RMCS-1102 is Rhino Motion Controls new and improved DSP based micro-stepping drive for 1.8deg Bipolar Stepper Motors. It is designed for smooth and quiet operation without compromising on torque and control at higher speeds. It has short-circuit protection for the motor outputs, over-voltage and under-voltage protection.

The RMCS-1102 achieves micro-stepping using a synchronous PWM output drive and high precision current feedback and this is absolutely silent when the motor is stopped or turning slowly. It virtually eliminates stopped-motor heating regardless of power supply voltage using a DSP based PID current control loop.

The RMCS-1102’s closed-loop control gains are calibrated on start-up based on motor characteristics and also adjusted dynamically while the motor is in motion. This control algorithm makes it capable of achieving better torque at higher speeds in comparison to comparable drives in its range.

The PULSE/STEP, DIRECTION inputs are optically isolated. Both inputs work with 2.5V, 3.3V or 5V logic drive signals. The input drive current is 5mA at 2.5V so almost all logic family (74LS, 74HC, etc.) can be used to drive these inputs. Each input provides individual anode and cathode connections to the opto-isolator allowing for multiple input drive interfaces.


Micro-Stepping Drive Features

  • Smooth and quiet operation at all speeds and extremely low motor heating
  • Industrial grade performance for 2-Phase Bipolar, 4-Phase and Uni-polar Stepper Motors
  • Input supply voltage from 15VDC to 50VDC
  • Selectable peak coil current from 0.5A to 5A
  • Inaudible 20kHz current chopping frequency
  • Selectable half-current during motor standstill to further reduce motor heating
  • Selectable micro-steps up to 20000 steps per rotation for a 1.8deg stepper motor and adjustable for bulk orders
  • Higher motor torque and higher speeds achievable due to advanced PID loop control algorithm
  • 2.5V, 3.3V and 5V compatible PULSE and DIRECTION inputs with 2-wire opto-isolated interface
  • Short-circuit protection for the motor outputs, over-voltage and under-voltage protection
  • LED indication for power and error states

Power and Motor Terminal Assignments

Terminal No.

Terminal Name

Description
Terminal 1

GND

Power Ground or Power –Ve
Terminal 2

+V

Power +Ve (12VDC to 50VDC Max wrt. GND)
Terminal 3

B-

Motor Coil Phase B-
Terminal 4

B+

Motor Coil Phase B+
Terminal 5

A-

Motor Coil Phase A-
Terminal 6

A+

Motor Coil Phase A+

Pulse and Direction Input Assignments

Terminal No.

Terminal Name

Description

Terminal 1

ENA-

Enable (Motor Free)  -Ve optically isolated input
Terminal 2

ENA+

Enable (Motor Free) +Ve optically isolated input
Terminal 3

DIR-

Direction -Ve optically isolated input
Terminal 4

DIR+

Direction +Ve optically isolated input
Terminal 5

PUL-

Pulse -Ve optically isolated input
Terminal 6

PUL+

Pulse +Ve optically isolated input

Switch Selection Table for Motor Coil Current Setting

Peak Current

SW6

SW7

SW8

0.50A

OFF

OFF

OFF

1.00A

OFF

OFF

ON

1.40A

OFF

ON

OFF

2.00A

OFF

ON

ON

2.80A

ON

OFF

OFF

3.30A

ON

OFF

ON

4.20A

ON

ON

OFF

5.00A

ON

ON

ON

Switch Selection Table for Step Resolution Setting

Steps/Rev

SW1

SW2

SW3

SW4

200

ON

ON

ON

ON

400

OFF

ON

ON

ON

800

ON

OFF

ON

ON

1000

OFF

OFF

ON

ON

2000

ON

ON

OFF

ON

3200

OFF

ON

OFF

ON

4000

ON

OFF

OFF

ON

8000

OFF

OFF

OFF

ON

1600

ON

ON

ON

OFF

6400

OFF

ON

ON

OFF

10000

ON

OFF

ON

OFF

12000

OFF

OFF

ON

OFF

12500

ON

ON

OFF

OFF

12800

OFF

ON

OFF

OFF

16000

ON

OFF

OFF

OFF

20000

OFF

OFF

OFF

OFF

Switch in downward positions is ON 
SW5 ON – Half-Current during Stand-still
SW5 OFF – Full-Current during Stand-still

Downloads

Micro-Stepping Motor Drive 50V Installation Manual and Datasheet