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Product Description

Roboteq’s AX2550 controller is designed to convert commands received from a R/C radio, Analog Joystick, wireless modem, or microcomputer into high voltage and high current output for driving one or two DC motors. Designed for maximal ease-of-installation, it is delivered with all necessary cables and hardware and is ready to use in minutes.

The controller's two channels can operate independently or mixed to set the direction and rotation of a vehicle by coordinating the motion on each side of the vehicle. The motors may be operated in open or closed loop speed mode. Using low-cost position sensors, they may also be set to operate as heavy-duty position servos.

Any of the above versions can be ordered in single channel configuration SC for single motor at double power.

The controller can be reprogrammed in the field with the latest features by downloading new operating software from Roboteq.

Technology Information

Detailed description of the technology and features of all AX-family controllers can be found on the Technology page

	AX2550	AX2550HE MATURE not recommended for new design	AX2550SC	AX2550HESC MATURE not recommended for new design
Power Stage
Operating Voltage	2550 and 2850: 12V to 40V DC 2572 and 2872: 12V to 72V DC
Number of Channels	2	2	1	1
Max Current   30s   1min   3 min   1h & up	- 120A 100A 80A 60A	- 140A 120A 100A 80A	- 240A 200A 160A 120A	- 280A 240A 200A 160A
Surge Current	>250A	>500A	>500A	>1000A
ON Resistance	5 mOhm	2.5 mOhm	2.5 mOhm	1.25 mOhm
Synchronous Rectification	Yes - Allows regenerative braking
Current Limiting	By automatic power output reduction according to user preset limit and temperature
Temperature protection	Automated current limit reduction starting at 80o C (175o F) case temperature
Voltage protection	Output shut off below 12V and above 43V (75 Volt for AX2572)
Power Wiring	8 AWG wires		8 AWG wire pairs
Command
R/C Inputs	2 + 1 accessories (1.0ms - 1.5ms center - 2ms, Adjustable)
Serial Interface	RS232. 9600 bauds
Analog Interface	2 inputs (0V - 2.5V center - 5V)
Input Corrections	Ch1 & Ch2 mixing for tank steering. Programmable deadband. 4 Exponent & Logarithmic command curves.
Input/Outputs
Optical Encoder Interface	Not available
Analog Inputs	2 inputs, 8-bit resolution
Digital Outputs	1 output, 24V 2A max.
Digital Inputs	3 general purpose inputs
5V Supply Output	100mA max for Radio or other devices
Operating Modes
Open Loop Speed	Forward & Reverse Speed Control. Separate or Mixed
Closed Loop Speed	Use Tachometer on analog inputs & PID
Position Mode	Use Potentiometer on analog inputs & PID
Controller Configuration	Jumper-less. Configuation using built-in switch and LED display or PC utility
Physical
Operating Temperature	-40 to +85oC case temperature
Enclosure	Heat-sinking Aluminum Extruded Case
Controller size	5.5" (140mm) wide x 1.6" (40mm) tall x 9" (228mm) long including mounting brackets
Cables	10" (25cm) RC cable to Radio. 4' (1m) RS232 cable for PC connection
Weight	3.3lbs (1.5kg)
	AX2550	AX2550HE	AX2550SC	AX2550HESC