The Spanawave/Giga-tronics/Ascor 3000-4801 is a 48-channel opto-isolated CMOS I/O module engineered for industrial automation, process control, and data acquisition systems. This C-size VXI module delivers 48 optically isolated, bidirectional I/O lines organized as six 8-bit bytes, each independently configurable under program control. The module supports TTL and CMOS signal levels with selectable active-high or active-low polarity on input and output bytes. It provides AND, OR, and XOR masking on each byte, programmable tri-state control, and handshake support via DRD, DAK, RFD, and DAV control signals. Byte transfer sequencing is programmable, and interrupt modes are selectable on programming error or handshake events. The 74ABT16541 driver chip delivers output levels of 3.0 V (at −3 mA) or 2.0 V (at −32 mA). Data is programmed and returned as hexadecimal ASCII characters, or controlled individually by ‘H’ or ‘L’ commands. This module functions as a hardware and software compatible replacement for the Tektronix VX4801.
Technical Specifications
• Channels: 48 opto-isolated CMOS I/O lines, bidirectional, TTL/CMOS capable
• Organization: Six 8-bit programmable bytes
• Output Voltage: 3.0 V (Ioh = −3 mA) or 2.0 V (Ioh = −32 mA)
• Power Requirements: 5 V @ 2.2 A maximum
• Operating Temperature: 0 °C to 55 °C
• Storage Temperature: −40 °C to 75 °C
• Humidity (Operating): 10 % to 90 % non-condensing
• Humidity (Storage): 0 % to 95 % non-condensing
• Weight: 3 lbs
• Form Factor: C-size VXI module
– Key Features
• Opto-isolated I/O for noise immunity in industrial environments
• Programmable polarity selection (active high/active low) per byte
• Bitwise masking operations (AND, OR, XOR) on each 8-bit byte
• Handshake control with DRD, DAK, RFD, and DAV signal support
• Programmable byte transfer sequencing for flexible data flow
• Tri-state output control via program or external logic
• Selectable interrupt generation on programming errors or handshake events
• Hexadecimal ASCII or individual byte (‘H’/’L’) command interface
– Typical Applications
• Industrial process control and automation
• Data acquisition and monitoring systems
• Equipment interfacing requiring galvanic isolation
• Handshake-based digital communication protocols
– Compatibility & Integration
• VXI platform compatible
• Direct replacement for Tektronix VX4801 (Part Number 90401710)
• Includes VXIplug&play software driver
• NSN: 5998-01-587-9318
