The Keithley 7156 General Purpose Scanner Card is a signal-routing component for automated test and data-acquisition systems integrated with Keithley 7000 Series switch/control mainframes. It provides configurable channel density and fast switching to support multi-point measurement and signal-path control across laboratory and production environments.
## Technical Specifications
**Channel Configuration**
• 10 channels (2-pole mode) or 20 channels (1-pole mode)
• 2-pole Form A relay contact configuration
• 37-pin D-sub connector interface
**Relay & Switching Performance**
• Relay drive current: 30 mA (7156-D) or 50 mA (7156-M)
• Actuation time: Less than 2 ms (exclusive of mainframe)
• Contact resistance: Less than 2 Ω to rated life
• Contact potential: Less than 100 µV per contact pair; typically less than 50 µV
**Signal Handling**
• Maximum signal level: 150 V, 250 mA, 10 VA peak (resistive load)
• Contact life: 10⁸ closures (cold switching); 10⁷ closures (at maximum signal level)
## Key Features
• Dual relay-drive options accommodate different mainframe architectures
• Low contact resistance and millivolt-level potential drop suit precision measurement applications
• Fast sub-2 ms switching enables high-throughput automated test sequences
• Extended contact life under cold-switching conditions supports long-term production use
## Typical Applications
• General switching and test configuration
• High and low current testing
• High and low voltage measurement
• Temperature measurement
• High-frequency and RF testing
## Compatibility & Integration
The 7156 inserts into Keithley 7000 Series switch/control mainframes and integrates with DMM and SourceMeter® instruments for coordinated measurement and switching control.
