Racal Instruments 1260-35-01

The Racal Instruments 1260-35-01 is a high-density scanner and multiplexer module for VXIbus test systems. This C-size, single-slot module delivers user-configurable switching across sixteen different topology options, from 1×96 two-wire to 1×192 one-wire scanner configurations. It handles switching tasks including continuity testing, audio circuit verification, and telephone line applications with 50 MHz bandwidth and minimal thermal offset drift. The module supports up to 250 VDC or VACrms at 1 A per channel, with maximum switchable power of 30 W DC or 62.5 VA per channel. Open-channel capacitance remains below 600 pF, insertion loss stays under 0.1 dB at 100 kHz in 1×6 configuration, and crosstalk measures better than -90 dB at 100 kHz. Relay coil current monitoring enables confidence checking of relay operation. The 1260-35-01 operates on 4.0 l/s airflow cooling and weighs 3.07 lb (1.33 kg) without Option 01/01T.

– Technical Specifications

• Bandwidth: 50 MHz (module); >15 MHz at -3 dB (1×48 configuration)
• Maximum Switchable Voltage: 250 VDC or VACrms (terminal-terminal or terminal-chassis)
• Maximum Switchable Current: 1 A per channel
• Maximum Switchable Power: 30 W DC; 62.5 VA per channel
• Open Channel Capacitance: <600 pF
• Insertion Loss: <0.1 dB at 100 kHz (1×6 configuration)
• Crosstalk: <-90 dB at 100 kHz
• Thermal Offset: Low
• Cooling Requirement: 4.0 l/s airflow
• Weight: 3.07 lb (1.33 kg) without Option 01/01T

– Key Features

• Sixteen user-selectable multiplexer/scanner configurations
• Message-based control via Option 01 interface
• Message-based and register-based control via Option 01T interface
• Relay coil current monitoring for operational assurance
• Two connector types: ribbon cable mating connectors (1260-35) or crimp pin user connectors (1260-35A)

– Typical Applications

• Continuity testing
• Audio circuit switching
• Telephone line switching

– Compatibility & Integration

Designed for Racal Instruments test and measurement systems using VXIbus architecture. Controlled via Option 01 or Option 01T interface with message-based or register-based programming syntax.