Keysight / Agilent / HP E2272A Dual 8 x 1 Relay Multiplexer M-Module

The Keysight E2272A is a single-wide M-Module relay multiplexer featuring 16 independent latching DPST relays configured as two 8-to-1 multiplexers or, via jumper selection, a single 16-to-1 multiplexer. It performs independent two-wire signal routing to common destinations, making it ideal for automated test and data acquisition systems requiring flexible switching architectures. The module supports 8-bit register-based control, maskable interrupts on relay completion, and an 8-operation FIFO buffer for efficient multiplex management. With a 44-pin DSUB female connector and compliance to ANSI/VITA Std 12-1996, the E2272A integrates into VXI, VME, PCI, PXI, cPCI, and Ethernet carrier platforms.

## Technical Specifications

**Relay Configuration**
• 16 independent latching DPST relays
• Dual 8 × 1 or single 16 × 1 multiplexer (jumper-selectable)
• Switching time: 8 ms typical (close or open)
• Relay life: 10⁵ operations at rated load (typical)

**Electrical Performance**
• Maximum voltage (terminal to terminal or chassis):
– DC: 60 V / 200 V
– AC RMS: 48 V / 125 V
– AC Peak: 68 V / 175 V
• Maximum current per switch: DC 2 A, AC peak 2 A
• Maximum current per module: DC 8 A, AC peak 8 A
• Maximum power per switch: DC 50 W, AC 50 VA
• Maximum power per module: DC 200 W, AC 200 VA
• Contact resistance: < 0.2 Ω
• Thermal offset: 10 MHz typical
• Crosstalk: < -64 dB (< 100 kHz), < -44 dB (< 1 MHz), < -24 dB (< 10 MHz)
• Closed channel capacitance: < 20 pF Ch-Ch, < 40 pF Hi-Lo, < 75 pF Ch-chassis (typical)

**Control & Interface**
• 8-bit data transfers
• Maskable interrupts on relay completion
• 8-operation FIFO buffer
• 44-pin DSUB female connector

**Environmental & Power**
• Operating temperature: 0 °C to 55 °C
• Storage temperature: -40 °C to 75 °C
• Power: +5 V @ 0.2 A

## Key Features

• Flexible multiplexer topology selectable via jumper
• Low contact resistance and thermal offset for precision measurements
• High insulation resistance and bandwidth support for analog and RF signal routing
• FIFO buffer reduces software overhead during continuous multiplex operations
• Maskable interrupt capability enables polled or interrupt-driven relay management

## Compatibility & Integration

The E2272A conforms to ANSI/VITA Std 12-1996 single-wide M-Module specifications and operates with VXI, VME, PCI, PXI, cPCI, and Ethernet carriers, providing broad platform flexibility.