Keysight / Agilent / HP E8462A 256-Channel Relay Multiplexer

The Keysight E8462A is a C-size, 1-slot VXI multiplexer module built on non-latching armature relays for high-density signal routing in automated test and data acquisition systems. With 256 channels and eight programmable switching topologies, it accommodates two-wire, three-wire, and four-wire measurement configurations. Register-based control enables flexible, reconfigurable signal paths across diverse circuit topologies.

## Technical Specifications

**Switching Architecture**
• 256 total channels across eight configurable topologies: one 256 × 1, four 64 × 1, one 128 × 2, two 32 × 4, one 64 × 3, eight 32 × 1
• Non-latching armature relays with 5 ms maximum open/close time
• Maximum switching current: 2 A @ 30 V
• Rated full resistive load: 60 VA

**Electrical Ratings**
• DC voltage: 250 V (Option 012), 60 V (Options 014/015)
• AC peak voltage: 350 V (Option 012), 70.7 V (Options 014/015)
• Power dissipation: 10 W typical, 30 W maximum per slot
• Current draw: +5 V at 1.0 A typical

**Environmental & Physical**
• Operating temperature: 0°C to 55°C
• Storage temperature: 0°C to 40°C
• Operating humidity: 65% RH (0°C to 40°C)
• IEC 664 Pollution Degree 2

## Key Features

• Eight independent switching topologies support varied measurement configurations without hardware reconfiguration
• Terminal block options (sold separately) provide voltage and protection flexibility across three connector variants
• Included 2.5-in. analog bus cable (E1400-61605) enables direct slot-adjacent module integration
• Register-based control simplifies programmable routing within VXIbus systems

## Typical Applications

Automated test systems requiring multi-channel signal distribution, resistance measurement networks, temperature sensor multiplexing, and multi-point data acquisition with configurable measurement topologies.

## Compatibility & Integration

Register-based VXI module designed for E1400-series VXIbus systems. Direct compatibility with E1411B multimeter modules via included analog bus cable. Terminal block integration requires separate procurement of appropriate Option 012, 014, or 015 terminal card.