The Keithley 7056 is a 10-channel scanner card engineered for integration with Keithley scanner mainframes such as the Model 705. This plug-in card expands measurement system capacity by routing signals across multiple test points through configurable 2-pole Form A relays. Operation modes include voltage scanning, independent relay switching, or matrix routing, accommodating diverse signal path and high-density switching requirements.
## Technical Specifications
**Channel Configuration**
• 10 channels in 2-pole mode
• 20 channels in 1-pole mode (HI or LO switched to separate output with common guard connection)
• 2-pole Form A relay contacts
• Includes Model 7055 Quick Disconnect Card
**Electrical Performance**
• Maximum signal: 150 V, 250 mA, 10 VA peak (resistive load)
• Contact resistance: Less than 2 Ω to rated life
• Contact potential: Less than 100 µV per contact pair (input to output); typically less than 50 µV
• Relay drive current: 24 mA per relay (typical)
• Common mode voltage: Less than 150 V peak
• Actuation time: Less than 2 ms (mainframe time excluded)
• Channel isolation: Greater than 10⁹ Ω; typically less than 20 pF
• Input isolation (differential): Greater than 10⁹ Ω; typically less than 50 pF
• Input isolation (common mode): Greater than 10⁹ Ω; typically less than 150 pF
• Channel crosstalk: Less than 50 dB @ 1 MHz into 50 Ω load
**Contact Life**
• 10⁸ closures (cold switching)
• 10⁷ closures (at maximum signal level)
**Connections**
• Screw terminal connectors mounted on Model 7055 quick disconnect section
• Maximum wire size: 18 AWG
## Key Features
• Rear-panel installation and removal
• Multi-mode operation: voltage scanner, relay card, or matrix configuration
• High channel isolation exceeding 10⁹ Ω with minimal capacitive coupling
• Low contact potential enables precision analog signal routing
• Extended relay life for high-cycle test environments
## Physical & Environmental
• Dimensions: 32 mm H × 114 mm W × 272 mm L (1.25 in. × 4.5 in. × 10.75 in.)
• Weight: 0.27 kg (9.5 oz.)
• Operating temperature: 0°C to 50°C (derated to 35°C at 70% RH)
• Storage temperature: -25°C to 65°C
## Compatibility & Integration
Designed for Keithley scanner mainframes including Model 705. Direct plug-in architecture with barrier strip I/O connectors.
