Keithley 2268-20-42 Power Supply
The Keithley 2268-20-42 is an advanced DC power supply designed for large power systems that require efficient and flexible power management. This model is a predecessor to the Keithley 2260B-30-72 and offers remarkable capabilities for high-power applications.
With the ability to control up to 30 Series 2268 supplies through a single interface, the Keithley 2268-20-42 simplifies the management of multiple power supplies. By linking these units via RS-485 interfaces, users can operate them from a master controller using any of the five standard PC interfaces—a significant advantage for complex systems.
The 2268-20-42 features a robust output of 20V and 42A, delivering a total of 850 Watts. Its dual auxiliary outputs—15V and 5V—cater to signaling and control tasks, eliminating the need for additional power supplies or data I/O cards in many applications.
For those requiring expanded voltage or current capabilities, this power supply allows for flexible configurations. Up to two Series 2268 units can be connected in series for higher voltage outputs or up to four in parallel for increased current needs. An analog control line enables master-slave setups, ensuring that safety settings on the master supply protect the entire configuration.
This model is equipped with extensive safety features, including:
- Over-voltage and under-voltage shutdown levels to protect the load.
- Over-current protection to prevent damage from excessive current.
- An over-temperature limit safeguarding the power supply's internal components.
- A standard foldback function that disables output under specific loading conditions, complemented by a programmable delay feature to prevent unnecessary shutdowns.
- A hardware output interlock for when external circuits lose continuity.
- Loop protection for individually shutting down any supply’s output without affecting the entire system.
Additional characteristics of the Keithley 2268-20-42 include:
- Compact 1U, half-rack enclosure for space-saving integration.
- Multiple built-in interfaces: LAN, USB, GPIB, RS-232, RS-485, and isolated analog inputs, all standard features.
- Modes for constant voltage, constant current, and constant power control.
- Auto sequence capabilities for executing internal commands, reducing bus communication time.
- Certified compliance with CSA 22.2 No. 61010-1, 60950-1-07, UL61010-1, and UL60950-1 (2nd ed.), marked with cCSAus and CE for EMC and EU Low Voltage Directive compliance.
The Keithley 2268-20-42 is ideal for demanding applications such as production testing, environmental testing, and accelerated life testing, clearly showcasing its versatility and advanced engineering.
