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National Instruments 777935-01 PXI FlexMotion Control Module

The part number 777935-01 from National Instruments is the identifying part number for the PXI-7344 PXI FlexMotion Control Module. This FlexMotion Control Module is designed to be used as servo and stepper motor controllers for the PCI and PXI bus computers providing fully programmable motion control for up to 4 independent or coordinated axes of motion, with dedicated motion I/O for limit and home switches and additional I/O for general-purpose functions. This motion controller module can perform point-to-point and straight-line vector moves for stepper motor applications. It also adds the ability to perform arbitrary and complex motion trajectories using stepper motors or servo devices.

The 777935-01 PXI FlexMotion Control Module can control servo motors, servo-hydraulic actuators, servo valves, and other types of servos. The module uses quadrature encoders or analog inputs for position and velocity feedback in a closed-loop configuration. The module is designed on the advanced dual-processor architecture that uses a Motorola MC68331 real-time 32-bit CPU, combined with an Analog Devices ADSP-2185 digital signal processor (DSP) and custom field programmable gate arrays. 

The 777935-01 has a PID update rate range of 62.5 to 500 µs/sample allowing it to quickly change the output of the servos based on the input values. It has position accuracy of ±1 quadrature count with encoder feedback and  ±1 LSB with Analog feedback. The trajectory update range for this controller is 62.5 to 500 µs/sample with 4 axis update range of 250 µs total. 

This module has 8 multiplexed analog inputs with 4 reserved for user signals and the other 4 reserved for calibration. The programmable voltage range of the inputs is  ±10 Volts, ±5 Volts, 0 to 10 Volts, 0 to 5 Volts. The controller also features 4 analog outputs with a voltage range of ±10 Volts and a current range of ±5 mA. This module comes with 4 8-bit ports Digital I/Os with 2 PWM outputs. The module has a power consumption of 5.7 Watts and operates on 12 Volts DC with 30 mA of current draw. This module has dimensions of 16 by 10 cm and weighs 170 g (6 oz.).