Model 789A-3 Stepper Drive Scan Controller

The Model 789A-3 scan controller provides the user with a low cost, high resolution, easy to use, stepper motor scanning system.

The Model 789A-3 comes complete with a stepping motor to fit McPherson monochromators or sample handling accessories. The cabling for power and limit switches, controller, and power supply are furnished with this controller. Selectable features include scanning direction, rate, and motor enable/disable. User friendly front panel controls selection of all functions. Our standard smart serial interface permits selectable features to be changed remotely. No analog to digital or 1/0 boards required.

For users interested in controlling devices via TTL or C-MOS logic, consult factory for details.

Please specify 110V/60Hz or 220/50Hz with your order, also indicate the model number of the instrument to be fitted if not ordering with the instrument.

Characteristics

• Selectable scan speeds from 0.1 to 999.9 Angstroms per minute
• Selectable baud rates: 300, 1200, 2400, 4800, 9600,19.2K, and 39K (Factory set to 9600)
• Limit interlock system
• Operates in either direction
• Slew function permits high speed go to
• Motor interlock system
• LEDs provide status information at a glance
• RS232 communications standard, IEEE available
• LED digital display available

Specifications

Power	115/220 VAC, 50/60 Hz, 20 Watts
Dimensions	Width: 8.38 in. (21.27 mm)
	Height: 5.22 in. (13.26 mm)
	Depth: 14.38 in. (36.51 mm)
Weight	8.75 lbs. (3.98 kg)
Motor	24 volts @ 1.0 amp/phase (nema-23)
Motor Resolution	36,000 step/rev - local
	Up to 50,000 step/rev - RS232

McPherson, Inc.