Keithley 7751 500V Source/Switch Card

The Keithley 7751 is a high-voltage Source/Switch Module engineered for the Keithley 2790 SourceMeter Switch System. It delivers programmable DC voltage sourcing from 50V to 500V with 100mV resolution and concurrent multi-channel relay switching. The module combines voltage and current sourcing with a built-in current-to-voltage converter for precision insulation resistance and continuity measurements. Primary applications include automotive component testing, airbag inflator validation, and bridgewire resistance characterization.

## Technical Specifications

**Voltage Source**
• Programmable range: 50V to 500V, 100mV resolution
• Accuracy: 0.5% + 0.13V (2-year)
• Temperature coefficient: 0.03%/°C (0–18°C, 28–40°C) for 10MΩ range; 0.05%/°C for 100MΩ; 0.12%/°C for 1GΩ
• Maximum output current: 50µA at rated accuracy
• Typical short-circuit current: <1mA
• Rise time: 250ms (50V to 500V), 1000ms (500V to 50V) to 0.1% of final value

**Current Source**
• Programmable range: 0mA to 50mA, 10µA resolution
• Output voltage compliance: 5.5V ±10%
• Accuracy: 0.06% + 10µA (2-year)
• Settling time: 1ms typical to 0.1% of final value
• Temperature coefficient: (0.001% + 0.25µA)/°C (0–18°C, 28–40°C)

**Current Measurement (I/V Converter)**
• Measurement range: 0µA to 50µA
• Accuracy: 0.5% (of reading) + 5nA to 6nA (2-year)
• Voltage burden: <1mV
• Minimum resistance measurement: 10MΩ at rated accuracy

**Relay Switching**
• Configuration: 4 Form A channels or 4 sets of 4-pole or 8 sets of 2-pole signals
• Type: Latching electromechanical
• Actuation time: 10⁶ operations typical

## Key Features

• Four relay banks enable single or dual inflator unit interfacing
• Low-current measurement capability down to nanoampere levels
• Fast relay switching with <3ms actuation
• High impedance testing suited for insulation and continuity validation

## Typical Applications

• Automotive airbag inflator electrical testing
• Bridgewire and shunt bar resistance measurement
• High-voltage insulation resistance characterization
• Conductor continuity verification

## Compatibility & Integration

Exclusively designed for integration with the Keithley 2790 SourceMeter Switch System mainframe.