RMC75 Hardware Overview

The RMC70 motion controller series offers three RMC75 CPU's for one- and two-axis systems. A number of feedback options are available for a wide variety of hydraulic, electric, and pneumatic position and position–pressure or position-force applications.

An RMC75 motion controller consists of the CPU module, Axis module, and optional Expansion modules. The CPU module and Axis module make up the base module. The base module is always shipped as one unit.

CPU Module

Axis Module

Expansion Module

CPU Modules

The CPU modules include the main motion control processing unit, the communication channel such as serial, PROFIBUS, Ethernet, etc. and a monitor port or USB port for communications to the RMCTools software.

CPU Module	Description	RMCTools Monitor Port
RMC75E	Controller with Ethernet Communications	USB
RMC75S	Controller with Serial Communications	RS-232
RMC75P	Controller with PROFIBUS-DP Communications	RS-232

Comparing the RMC75 CPU Modules

In addition to the communication port and RMCTools monitor port, the RMC75 CPUs differ in the following ways:

Monitor Port Speeds
The RMC75E USB port provides a much faster connection to RMCTools, with much faster plot upload speeds, than does the serial port on the RMC75S and RMC75P.
Retentive Variables
The RMC75E variables can be set to retentive, meaning that the Current Value will be retained between power cycles without requiring a Flash update.
Memory Size
The 75E has significantly more memory for plots, programs, curves. See Plot Overview, Program Capacity and Time Usage and Curve Storage Capacity for details.
Loop Times
75E supports faster loop times.
Internal Processor
The RMC75S and RMC75P internal processors are 32-bit. The RMC75E has some 64-bit processing capabilities. In practice, the only difference the user will experience due to this is that some mathematical calculations will produce slightly different results.

Axis Modules

The axis modules have one input per axis for interfacing to transducers and one Control Output per axis for interfacing to an actuator. Axis modules are either one or two axes. Each axis module interfaces to a different type of transducers.

Axis Module	Description
AA1	1-Axis Analog Voltage or Current Input, Analog Control Output
AA2	2-Axis Analog Voltage or Current Inputs, Analog Control Outputs
MA1	1-Axis MDT and SSI Input, Analog Control Output
MA2	2-Axis MDT and SSI Inputs, Analog Control Outputs
QA1	1-Axis Quadrature Encoder Input (5 V differential), Analog Control Output
QA2	2-Axis Quadrature Encoder Inputs, (5 V differential), Analog Control Outputs

Optional Expansion Modules

Up to four optional expansion modules can be added to enhance the capabilities of the RMC75. These modules can be field-added. Expansion modules can be used for reference axes, pressure control, or discrete I/O.

Exp Module	Description
D8	8 Individually Configurable Discrete I/O, 12-24 VDC
A2	2 Analog inputs (±10 V or 4-20 mA)
AP2	2 Analog inputs (±10 V or 4-20 mA)for Position-Pressure or Position-Force Control
Q1	1 Quadrature input (5 V differential) - max 2 Q1 modules per RMC75

Common Specifications

These are the general specifications for the RMC75 motion controllers. For specifications on individual modules, refer to each module.

Motion Control
Control loop time	User-selectable 0.5ms, 1ms, 2ms, or 4ms
Maximum speed	Unlimited
Power
Voltage	+24 VDC +/-10%
Current – Base only	Typical 290 mA @ 24 VDC, max 375 mA
Current (4 Expansion modules)	Typical 385 mA @ 24 VDC, max 500 mA
DC-DC converter isolation	500 VAC, 700 VDC, input to controller
Mechanical
Mounting	Symmetrical DIN 3 or panel-mount
Dimensions – Base units	3.25 x 5.0 x 2.75 in (8.3 x 12.7 x 7 cm) (WxHxD)
with 4 Expansion modules	Varies x 5.0 x 2.5 in (?? x 12.7 x 6.4 cm) (WxHxD)
Weight	12 ounces (0.37 kg) max
with 4 Expansion modules	Varies, 2.0 lb (0.9 kg) max
Environment
Operating temperature	+32 to +140°F (0 to +60°C)
Storage temperature	-40 to +185°F (-40 to +85°C)
Humidity	95% non-condensing
Agency compliance	UL, CUL, CE: RMC75S, RMC75P, RMC75E