Keithley 7020

The Keithley 7020 and 7020-D Digital I/O Interface Cards deliver high-density digital signal management for automated test systems. Each card provides 40 independent digital inputs and 40 independent digital outputs - 80 bits total - in a compact, cost-effective form factor. The 7020 uses a 96-pin DIN connector, while the 7020-D features dual 50-pin D-sub connectors optimized for frequent industrial connections. Both variants support monitoring and control applications requiring extensive digital signal routing without additional interface logic. ## Technical Specifications Digital I/O Configuration • 40 independent digital inputs with 10 kΩ internal pull-up resistors (removable for external pull-up devices) • 40 independent digital outputs as open-collector drivers • Input logic: Positive True; Input Logic Low ≤ 0.8 V; Input Logic High ≥ 2 V • Input Logic Low Current: –600 µA maximum @ 0 V • Input Logic High Current: 50 µA maximum @ 5 V • Maximum input voltage: 42 V peak (overvoltage protected) Output Characteristics • Open-collector drivers with internal 5.3 V pull-up or external supply to 25 V maximum • Per-channel sink current: 65 mA maximum • Per-bank (8-bit) sink current: 500 mA maximum • Per-card sink current: 1 A maximum • Collector-Emitter saturation voltage: <0.75 V @ 1 mA, <1 V @ 65 mA • Output protection: <18 Ω series resistance, PTC circuit protector per channel, internal flyback diode per driver • Capable of driving solenoids, relays, and small motors directly Environmental • Operating: 0° to 50° C, up to 35° C and <80% RH • Storage: –25° to 65° C ## Key Features • Selectable internal or external pull-up voltage via jumper configuration • Per-channel current limiting and overvoltage protection • Low saturation voltage enables efficient driving of inductive loads • DIN and D-sub connector options for different mechanical integration needs ## Typical Applications • Equipment control and device activation in production test environments • Digital signal monitoring in multi-unit automated test systems • Relay and solenoid switching without external driver circuits ## Compatibility & Integration The 7020 integrates into test systems requiring modular digital I/O expansion. Connector type selection (DIN vs. D-sub) determines mechanical fit and cable management strategy.