Overview
The Pacific Scientific 5645 is an advanced microstepping indexer/drive engineered for stepper motor motion control applications. This integrated unit combines the core functionality of the 5630 drive module with BASIC Motion Control indexing, delivering programmable precision in a single compact package. With 120VAC input capability and selectable output current ratings, the 5645 provides flexible, reliable motor control for industrial automation systems.
Key Features
- Programmable StepperBASICâ„¢ indexer with 12K bytes battery-backed RAM for program storage
- Switch-selectable output current: 5.0, 6.0, 7.5, or 8.0 amps RMS (7.1 to 11.3 amps peak)
- Integral power supply converts 120VAC input to 160-volt nominal DC bus via full-wave bridge rectifier
- Dual serial communication: RS-232 and RS-485/422 support for multi-unit control
- 16 discrete inputs (6 dedicated functions) and 12 programmable outputs with open-collector NPN transistor drivers
- Compact 4 kg housing with convection cooling suitable for cabinet-mount installations
Technical Specifications
| Input Voltage | 120VAC, ±15% (97–138VAC nominal range) |
| Input Current (Max) | 13 A RMS |
| Output Voltage (Bus) | 160V nominal DC |
| Output Current (Phase) | 5.0, 6.0, 7.5, 8.0 A RMS (switch selectable) |
| Output Current (Peak) | 7.1, 8.5, 10.6, 11.3 A (corresponding to RMS settings) |
| Drive Configuration | 2-Phase Bipolar Chopper Drive |
| Motor Memory | 12K bytes battery-backed RAM |
| Digital Inputs | 16 discrete inputs (6 dedicated functions) |
| Digital Outputs | 12 programmable outputs + 1 fault output (50 mA sink max each) |
| Communication Ports | RS-232, RS-422/485 for serial control |
| Operating Temperature | 0–50°C at full current; 0–60°C with idle current reduction |
| Storage Temperature | −55°C to +70°C |
| Weight | 4 kg (9 lbs) |
| Compatible Motor Series | Pacific Scientific 5000 series hybrid stepper motors |
Typical Applications
- Multi-axis CNC positioning and tool changers
- Automated packaging and labeling equipment
- Precision assembly line indexing
- Medical device dispensing and handling systems
- Laboratory automation and sample processing
- Textile and print-head control systems
Compatibility & Replacements
Compatible With
- Pacific Scientific 5000 series hybrid stepper motors (standard and enhanced performance lines)
- NEMA 23, 34, and 42 frame stepper motors with compatible winding ratings
- Industrial control systems supporting RS-232 or RS-485 serial communications
- Programmable logic controllers (PLCs) with discrete input/output capability
- Human-machine interfaces (HMIs) via serial gateway protocol
Replaces / Drop-In Replacement For
- Pacific Scientific 5630 drive module (when combined with external indexer; 5645 integrates both)
- Older fixed-current stepper drive controllers requiring field replacement
Works With
- StepperBASICâ„¢ programming language and development environment
- Pacific Scientific T10 terminal controller (via DA-9P connector)
- Step/direction signal output for external drive cascade
- Standard parallel motor cables (J1 connector interface)
- Idle current reduction firmware for cabinet thermal management
