Astronics / EADS / Racal 1255A Enhanced Automatic Switch System

The Astronics / EADS / Racal 1255A is a modular VXIbus switching controller designed to reduce ATE cost and complexity by consolidating switch management into a single chassis. It accommodates up to four C-sized 1260 Series switch modules and eliminates the need for separate VXIbus mainframes and controllers. The system integrates IEEE-488 (GPIB) and RS-232 interfaces with internal VXI local bus control, enabling direct integration into existing test environments. Non-volatile memory stores relay configurations, while relay monitoring provides confidence verification. Scan mode enables synchronous testing across multiple points. VXIplug&play compliant drivers simplify system development and deployment.

Technical Specifications Module Capacity:

Supports four C-sized VXIbus 1260 Series switch modules Interfaces:

IEEE-STD-488 (GPIB) interface

RS-232 serial interface

VXI local bus for switch card control Power:

Input voltage: 100, 120, 220, or 240 VAC ±10%

Frequency: 47 to 66 Hz

Maximum consumption: 150 VA Environment:

Operating temperature: 0°C to 50°C

Operating humidity: 95% non-condensing Standards:

MIL-T-28800 Type III, Class 5 compliance

EMC: Council Directive 89/336/EEC

Safety: Low Voltage Directive 73/23/EEC

Key Features

Message-based control of 1260 Series switch cards

Non-volatile memory for relay configuration storage

Relay monitoring with confidence checking

Synchronous scan mode for multi-point testing

VXIplug&play compliant drivers included

Optional rack mount kit available

Compatibility & Integration The 1255A integrates directly with Racal Instruments' 1260 Series switch modules and operates within the broader VXIbus switching systems family. IEEE-488 and RS-232 connectivity allows straightforward integration into legacy and modern ATE architectures. Optional accessories include 50 Hz operation, 220/240 VAC input fuse, and standard interface cables.