The Racal Instruments 1260-35 is a high-density scanner and multiplexer module for VXIbus systems, delivering configurable switching architectures from 1×96 down to 1×6 multiplexer topologies in both 2-wire and 4-wire formats. This C-size, single-slot module switches up to 250 VDC or VAC rms and 1 A per channel, handling maximum power of 30 W DC or 62.5 VA per channel. Bandwidth exceeds 15 MHz in 1×48 configuration and 50 MHz in 1×6 configuration, with insertion loss under 0.1 dB at 100 kHz and crosstalk better than −90 dB. Path resistance ranges from less than 1.0 Ω in 1×96 mode to 0.5 Ω in 1×6 mode, while isolation exceeds 7.5 × 10⁸ Ω. The module accepts message-based control (Option 01) or message and register-based control (Option 01T) via straightforward syntax. Ribbon cable (1260-35) or crimp pin (1260-35A) connectors are available. Relay coil current monitoring provides operational confidence checking. Designed for telecommunications, aerospace, and defense applications requiring extensive, reliable switching in laboratory and production environments.
Technical Specifications
• Architecture: Configurable as one 1×96 (2-wire), two 1×48 (2-wire), four 1×24 (2-wire), eight 1×12 (2-wire), sixteen 1×6 (2-wire), or 4-wire variants down to eight 1×6; also one 1×192 (1-wire via high/low selection)
• Switching Limits: 250 V DC or VAC rms (terminal-terminal or terminal-chassis); 1 A per channel; 30 W DC or 62.5 VA per channel
• Bandwidth: > 15 MHz (1×48); > 50 MHz (1×6)
• Insertion Loss: < 0.1 dB @ 100 kHz (1×6); < 0.5 dB @ 1 MHz (1×6); < 1.0 dB @ 10 MHz (1×6)
• Crosstalk: < −90 dB @ 100 kHz
• Path Resistance: < 1.0 Ω (1×96); 7.5 × 10⁸ Ω
• Capacitance: Open channel < 600 pF (1×96); channel-to-chassis < 200 pF (1×96); high-low < 600 pF (1×96)
• Thermal Offset: Low
– Key Features
• Message-based or message/register-based control interfaces
• Relay coil current monitoring for relay operation assurance
• Available with ribbon cable or crimp pin connectors
• Airflow requirement: 4.0 l/s
• Weight: 3.07 lb (1.33 kg) without Option 01/01T
• CE Mark compliance
– Typical Applications
• Telecommunications test systems
• Aerospace instrumentation
• Defense signal routing
• Production and laboratory measurement environments
– Compatibility & Integration
VXIbus C-size single-slot module. Control via simple message syntax (e.g., CLOSE 3.02). Option 01 or 01T interfaces support both legacy and modern control architectures.
