53A-260 – Dual Pulse Burst Generator/Stepping Motor Controller Card
OPT 1V – Add VXIbus Compatibility
53A-780 – Hooded Connector

• Pulse rates of 10 to 100,000 pulses per second with bursts of 1 to 9,999,999 pulses
• Configurable as a present counter or stepping-motor controller
• TTL output levels
• Pulse rates to 5 MHz with external oscillator

Pulse Burst Generator
Each output can be used to generate a burst of pulses from DC to 5 MHz when used with an external oscillator, or 10 to 100,000 pulses per second using the internal oscillator. The burst can be programmed from 0 to 9,999,999 pulses.

Stepping Motor Controller
When used as a Stepping Motor Controller the Card provides two independent outputs for controlling stepping motor translators. Each output is programmable from 0 to +9,999,999 pulses and has manually adjustable pulse rates from 10 to 100,000 pulses per second when using the on-card oscillator, or DC to 5 MHz when an external oscillator is used. The plus and minus sign sets the direction of the stepping motor.


Preset Counter
The 53A-260 can be used to count a preprogrammed number of pulses (0 to 9,999, 999) from DC to 5 MHz and provide both a signal out the front edge of the card and a vectored priority interrupt to the system controller when the preset number is reached.

Two LEDs provide Built-In-Test Equipment (” BITE”) for the 53A-260 Card. An individual LED will be lit when its corresponding channel contains a preset count – i.e., is busy.

Two independent TTL outputs.

Number of Steps:
Programmable from -9.999.999 to +9,999.999 steps (where © indicates clockwise and counterclockwise rotation when used as stepping motor controller).

Pulse/Step Rate (Internal Oscillator):
Adjustable from 10 to 100.000 steps per second.


Pulse/Step Rate (External Oscillator):
DC to 5 MHz.

Channel Outputs (each channel)
(Stepping Motor Controller):
TTL Pulse Train, active for either cw or ccw rotation.
TTL Pulse Train, active only during cw rotation.
TTL Pulse Train, active only during ccw rotation.
TTL Direction Control Line, low for cw, high for ccw.
TTL Direction Control Line, low for ccw, high for cw.
TTL Channel Busy Line, active high.
TTL Channel Busy Line, active low.
TTL Oscillator, internal or external.

Channel Inputs (each channel):
TTL Inhibit Signal, when brought low the pulse outputs will cease.
TTL External Oscillator.

Programmed By:
ASCII Characters.

Recommended Cable:

Available Option:
OPT 1V, add VXIbus compatibility