Keithley / MetraByte MB31-02 Voltage Input SCM

The Keithley/MetraByte MB31-02 is a voltage input signal conditioning module (SCM) engineered for precision voltage measurement in industrial and laboratory data acquisition systems. This module delivers -5V to +5V input and output ranges with calibrated accuracy of ±0.05% span ±10 µV RTI ±0.05 Vz, supported by laser-trimmed circuitry and chopper-stabilized amplification for exceptional long-term stability.

Technical Specifications

Input/Output Range: -5V to +5V

Calibrated Accuracy: ±0.05% span ±10 µV RTI ±0.05 Vz

Common Mode Rejection: 160 dB

Normal Mode Rejection: 90 dB

Signal Isolation: 1500 Vrms transformer isolation (signal and power sections)

RFI/EMI Immunity: High

Weight: 70 g (MB31)

Key Features

Transformer isolation eliminates ground loops, guards against transients, and prevents common-mode voltage problems

Chopper-stabilized amplification minimizes drift without requiring manual adjustment

Laser-trimmed for high calibrated accuracy

Integrated filtering and amplification conditioning

Identical pin-out and size across MB Series modules enable seamless integration and module interchangeability

Typical Applications

Industrial voltage measurement systems requiring high rejection of common-mode and normal-mode noise

Laboratory data acquisition platforms where long-term stability and low drift are critical

Ground-isolated measurement channels in multi-channel test environments

Systems operating in high-EMI environments

Compatibility & Integration The MB31-02 integrates into Keithley MetraByte MB Series backplane systems. Standardized pin-out and form factor allow mixing with other MB Series modules without modification. Installation is rated for IEC 60664 Installation Category I sources; avoid direct connection to mains or high-transient sources.