Comparing RMC Motion Controllers

RMC70, RMC150, and RMC200

Which Motion Controller Should I Use?

Choose between the RMC70, RMC150, and RMC200 based on the number of axes needed and the features available. Notice that the RMC200 at initial release will have nearly all the features of the RMC70 and RMC150. The RMC200 also has some features that the RMC70 and RMC150 do not have.

The RMC70, RMC150 and RMC200 use the same RMCTools software for setup and programming.


Max Control Axes Max Dual-Loop Axes Max Total Axes (Control+Reference)
RMC70 1-2 2 4
RMC150 2-8 8 16
RMC200 32* 32** 32

* Up to 24 control axes at inital release. Future releases will increase this to 32.

** Up to 16 dual-loop control axes at initial release. Future releases will increase this to 32.

Axes are a fundamental concept for all RMC motion controllers:

Control Axis
A control axis includes one control output and and the associated feedback controlled by the axis. A single-loop axis uses one feedback quantity, such as position. A dual-loop axis uses two feedback quantities, such as position and pressure.
Reference Axis
A reference axis includes only feedback. For example, a reference axis could be used for a joystick input.

Communications Options

Ethernet Serial

Ethernet Protocols

RMC200 Planned

Transducer and Actuator Options

Transducer and Actuator Compatibility

The RMCs connect to a variety of transducer types for position and pressure/force feedback.

SSI Magnetostrictive Start/Stop or PWM Analog ±10V, 4-20mA Quadrature Resolver
RMC200 Planned

Actuator Compatibility

The RMCs connect via an analog signal to valve electronics or motor amplifiers.

±10V ±20 mA, 4-20 mA

Control Features

The RMC70, 150, and 200 share most of the same features. In addition to the communications, transducer, and actuator differences listed above, some control features that differ between the controllers are listed below.

RMC70 RMC150 RMC200
Analog input resolution 16-bit 16- and 12-bit 18-bit
Analog output resolution 16-bit 12- and 14-bit 18-bit
Fastest loop time 500 μsec 500 μsec 250 μsec
Improved differential force scaling includes pressure of pressure sensors
SSI output and monitor mode (UI/O)
Negative correction factor for load cells
Multiple feedback filter types

Packaging and Expandability


The RMC70 consists of a factory-configured Base Module containing the CPU Module (which includes communications) and a one- or two-axis Axis Module.

Add Expansion Modules

Up to four user-installed Expansion Modules can be plugged on to an RMC70, adding ½ axis encoder for gearing, discrete I/O, and/or analog inputs for reference and position-pressure or position-force control. Unlike the RMC150 and RMC100, dual-loop position-pressure control capability is added by installing the AP2 Expansion Module.


The RMC150 is available in 3-, 4-, 5- and 6-slot factory configurable packages. The first slot can contain only certain modules. The second slot contains CPU module. The additional 1-4 slots can contain any combination of axis modules (each handling 2 axes) or DI/O or analog inputs. Dual-loop position-pressure or position-force control is added by specifying RMC151 in the part number.


The RMC200 consists of a base and user-installable modules. Available bases are B7 (7 slot base) and B11 (11 slot base). The first slot contains the power supply. The second slot contains the CPU module. The additional slots can contain any combination of I/O modules. The dual-loop position-pressure or position-force control requires purchasing enough Feature Key control loops to total 2 loops per dual-loop axis.

Support and Training

All RMC controllers, as with all Delta products, are backed by Delta’s responsive 24/7 customer support. Hundreds of people are trained each year on the RMCs. And with Delta’s policy of not obsoleting products as long as there is demand, your long-term investment is secure.

RMC Series Motion Controllers: Lasting value in electric and fluid power motion control... for systems of any size.