The Keithley 2268-100-8 is an 850 W DC power supply engineered for demanding automated test applications requiring high power density in a compact footprint. It delivers maximum output of 100 V at 8.5 A, housed in a 1U high, half-rack width enclosure that minimizes rack real estate while maintaining exceptional performance. The unit operates across three control modes—constant voltage (CV), constant current (CC), and constant power—with load regulation of ±0.05% (voltage) and ±0.1% (current), and line regulation of ±0.01% (voltage) and ±0.05% (current). Voltage ripple and noise measure ≤12 mV RMS and ≤100 mV peak-to-peak; current ripple stays ≤10 mA RMS. Transient response time is less than 2 ms. Programming resolution is 0.1 V and 0.01 A with ±0.5% accuracy on both voltage and current.
## Technical Specifications
**Output Characteristics**
• Maximum Output Voltage: 100 V
• Maximum Output Current: 8.5 A
• Maximum Output Power: 850 W
• Voltage Regulation (Load): ±0.05% of rated output voltage
• Current Regulation (Load): ±0.1% of rated output current
• Voltage Regulation (Line): ±0.01% of rated output voltage
• Current Regulation (Line): ±0.05% of rated output current
• Voltage Ripple & Noise: ≤12 mV RMS, ≤100 mV peak-to-peak
• Current Ripple: ≤10 mA RMS
• Transient Response: <2 ms (no-load to full-load transitions)
**Programming**
• Voltage Resolution: 0.1 V
• Current Resolution: 0.01 A
• Voltage Accuracy: ±0.5% of rated output voltage
• Current Accuracy: ±0.5% of rated output current
• Up-Programming Time (0 to Vmax): 100 ms
• Down-Programming Time (Full Load): 80 ms
**AC Input**
• Rated Input: 100 VAC to 240 VAC, 47 Hz to 63 Hz
• Operating Input: 85 VAC to 265 VAC continuous
• Input Current: 11.5 A at 100 VAC, 6 A at 200 VAC (at 850 W)
## Key Features
• Three control modes: CV, CC, and constant power operation
• Programmable foldback mode with user-defined delay for device protection
• Two auxiliary outputs (15 V, 5 V) for external relay/signaling control
• Overvoltage (OVP), overcurrent (OCP), and overtemperature (OTP) protection
• Interlock connection for external safety condition detection
• Isolated and non-isolated analog input options
• TTL-level and dry-contact compatible auxiliary outputs
## Interfaces & Integration
• Digital: LAN, USB, GPIB, RS-232, RS-485
• Analog: Isolated and non-isolated inputs (voltage or resistance control)
• Auto sequence control for internal command execution
## Typical Applications
Automated test systems, device characterization, burn-in testing, and bench-top research requiring stable, programmable power delivery with fast transient response and comprehensive protection.
