Rigol MC3132 32 channel differential Multiplexer module for use with M300 DAQ

The Rigol MC3132 is a 32-channel differential multiplexer module that expands the input capacity of the Rigol M300 Data Acquisition System Mainframe. By switching both HI and LO inputs across all 32 channels, the module delivers fully isolated signals to connected measurement instruments such as the MC3065 DMM module. It accommodates both 2-wire and 4-wire measurement configurations, with automatic channel pairing for resistance testing.

Technical Specifications

• Channels: 32 differential inputs organized into two 16-channel banks (A and B)


• Channel Architecture: Break-before-make switching on all channels; fully isolated inputs


• Measurement Modes: 2-wire and 4-wire configurations supported


• 4-Wire Pairing: Channel n automatically pairs with channel n+16 for resistance measurements


• Signal Isolation: −40 dB isolation within banks


• Temperature Support: Capable of supporting temperature sensor measurements


• Input Protection: 300 V on all ranges


• Physical Dimensions: 17.00 in (L) × 9.00 in (W) × 6.00 in (H)

Key Features

• Fully differential switching expands M300 system measurement points without signal compromise


• Break-before-make architecture eliminates transient cross-talk between channels


• Dual-bank topology simplifies 4-wire resistance and temperature measurement setup


• M3TB32 terminal block interface provides secure signal routing

Typical Applications

• Multi-channel analog signal acquisition in production test environments


• Resistance and temperature measurement networks requiring 4-wire kelvin sensing


• High-channel-count data logging with integrated DMM analysis


• Distributed sensor monitoring systems leveraging modular M300 architecture

Compatibility & Integration The MC3132 integrates directly into the Rigol M300 Data Acquisition/Switch System Mainframe and pairs with the MC3065 DMM module for synchronized measurement. Signal connections use the M3TB32 terminal block. The module operates as a transparent switching layer, preserving signal integrity to downstream measurement electronics.