Astronics / EADS / Racal 1260-114OC Open Collector Digital I/O Plug-In Module

The Astronics / EADS / Racal 1260-114OC is an open-collector digital I/O plug-in module delivering 96 independently configurable channels for TTL, CMOS, or standard open-collector signal switching. Engineered for the Racal Instruments 1260-100 Adapt-a-Switch VXIbus carrier, this module excels in industrial control, relay switching, and external device interfacing applications requiring voltage-independent output stages. ## Technical Specifications Channel Configuration • 96 channels: TTL, CMOS, or open-collector modes • 48-channel high-voltage/current open-collector (HVOC) variant available • Independent input/output configuration per channel • Tri-state/high-impedance capability on TTL/CMOS channels Electrical Performance • Data rate: up to 200 kHz • Output voltage drive: up to 50 V • Sink current: up to 1.5 A per channel • External pull-up supply (OC version): up to 32 VDC per independent group • External pull-up supply (HVOC version): up to 50 VDC per independent group Control Architecture • 2-wire programmable handshaking (active high/low selectable) • Synchronous, asynchronous, and mixed operating modes • Data representation in hex, decimal, or binary formats Physical & Integration • Single-slot, C-size VXIbus form factor • Front-panel installation into 1260-100 Adapt-a-Switch carrier • VXIplug&play framework support (Win32-based) • Driver support: LabWindows/CVI and LabVIEW when used with appropriate controller ## Key Features • Channel-by-channel configuration flexibility enables mixed TTL/CMOS/OC operation within a single module • Programmable handshaking eliminates external logic for flow control • High current sinking capability (1.5 A per channel) handles relay coils and solenoid switching directly • Voltage-independent open-collector outputs decouple digital logic from external supply domains ## Typical Applications • Industrial relay and solenoid switching matrices • Multi-voltage external device control • Test automation requiring mixed signal-level interfacing • VXI-based test and measurement systems ## Compatibility & Integration The module requires the Racal Instruments 1260-100 Adapt-a-Switch carrier and typically an Option-01T Smart Control Module for buffered I/O operations. VXIplug&play software frameworks provide standardized instrument control across Win32 platforms.