The Keithley 7020-D is an 80-bit digital I/O interface card delivering 40 independent inputs and 40 independent outputs for high-density signal monitoring and control in automated test systems. Two heavy-duty 50-pin D-sub connectors via short cables provide robust mechanical connection suitable for production environments with frequent connect/disconnect cycles. Open-collector output drivers with integrated flyback diodes, factory-installed 10kΩ pull-up resistors, and flexible voltage configuration support demanding industrial and ATE applications.
## Technical Specifications
**Digital I/O Architecture**
• 40 independent digital inputs with internal 10kΩ pull-up resistors
• 40 independent digital outputs configured as open-collector drivers
• Input logic levels: 0.8V maximum (low), 2V minimum (high)
• Maximum input voltage: 42V peak
**Output Driver Characteristics**
• Pull-up voltage: internally supplied at 5.3V; external connection accepts user-supplied voltage to 25V maximum
• Internal 10kΩ pull-up resistors; removable for external pull-up devices
• Positive Temperature Coefficient (PTC) circuit protector in series with each output
• Per-channel maximum sink current: 65mA
• Per-bank (8-bit) maximum sink current: 500mA
• Per-card maximum sink current: 1A
• Output protection resistance: <18Ω
• Collector-emitter saturation voltage: <0.75V @ 1mA, <1V @ 65mA
**Input Specifications**
• Input logic low current: −600µA maximum @ 0V
• Input logic high current: 50µA maximum @ 5V
**Power Supply**
• Internal 5.3V supply or external user-supplied voltage option
## Key Features
• Two 50-pin D-sub connectors with short cable assemblies for reliable industrial interconnection
• Internal flyback diode protection on all output drivers
• Jumper-selectable dual pull-up voltage support
• Integrated input and output protection
• Compact high-density implementation
## Typical Applications
• Automated test equipment (ATE) with extensive digital control and monitoring
• Production line relay and solenoid control
• Industrial process monitoring with parallel signal acquisition
• Large-scale digital switching and sequencing
## Compatibility & Integration
The 7020-D integrates into test systems requiring high-channel-count digital I/O in a single card slot. D-sub connector configuration optimizes for production environments where mechanical durability and frequent cable handling are operational requirements.
