Astronics / EADS / Racal Option 01T Switch Controller Card

The Astronics/EADS/Racal Option 01T Switch Controller Card is a daughterboard designed to integrate with the 1260 Series of switch modules, particularly the 1260-100 Adapt-a-Switch® Carrier. It provides comprehensive management and control of multiple switching functions across complex electronic systems in aerospace, defense, and industrial applications requiring precise signal routing. The Option 01T supersedes the Option 01 and is the recommended controller for all new system designs.

## Technical Specifications

• **Switching Speed:** Relay switching and digital I/O transitions under 9 microseconds
• **Maximum Control Capacity:** Up to twelve 1260-Series switch modules and/or Adapt-a-Switch plug-in switch cards
• **Carrier Module Configuration:** One Option 01T required for every two 1260-100 carrier modules (each carrier accommodates six switch cards)
• **VXIbus Trigger Lines:** Controls all eight TTL trigger lines on the VXIbus platform

## Key Features

• **Dual Control Modes:** Register-based interface for direct control register access; message-based interface supporting SCPI and IEEE-488.2 commands
• **Routing Commands:** Assignment of signal path names (Oscilloscope, DMM, Timer/Counter) to relay paths
• **Power-up Recall:** System powers up in predetermined state
• **Scan Function:** Synchronizes relay selection across multiple channels
• **Programmable Delays:** User-selectable timing intervals during channel switching
• **Include Feature:** Controls two or more relays within single or multiple modules
• **Confidence Mode:** Verifies correct relay operation after each switching command
• **Fail-Safe Conditions:** Pre-programmable to prevent unwanted channel closures and switching matrix contentions
• **VXIplug&play Support:** Framework-based compatibility

## Compatibility & Integration

• **VXIbus Platform:** Full integration with VXI local bus (LBus) interface
• **Switch Module Control:** Manages Racal Instruments VXIbus switch modules via message-based interface
• **Mainframe Compatibility:** Controls other switch modules within the mainframe via LBus