The Ametek / Elgar / Sorensen MML-80-20-102 is a modular electronic load module engineered for integration into MML series mainframes. This dual-input load module delivers 100W per channel—200W total capacity per module—and operates across 0–80V DC at 0–20A DC, making it suitable for characterizing power supplies, batteries, and electronic systems across R&D and production environments.
The module supports four operating modes: Constant Current (CC), Constant Voltage (CV), Constant Resistance (CR), and Constant Power (CP). Load regulation achieves <0.02% + 5 mV for voltage and <0.1% + 10 mA for current. Voltage measurement accuracy is ±(0.2% + 0.5V) with 10 mV resolution; current measurement achieves ±(0.4% + 10 mA) with 1 mA resolution. A 15-bit A/D converter provides consistent digitization of voltage and current readback.
Dynamic loading capability extends to 20 kHz with a programmable slew rate adjustable to 5A/µs. The module operates at input voltages as low as 1V, enabling high-current sinking even during low-voltage transient testing. Short-circuit simulation is available across CC, CV, and CR modes.
Integrated protection circuits include Over Power Protection (OPP), Over Current Protection (OCP) at approximately 2.04A per channel, Over Temperature Protection (OTP) at 85°C, and Over Voltage Protection (OVP). The module plugs into MML-4 (4-bay) or MML-2 (2-bay) mainframes, which provide power distribution and primary control infrastructure.
Technical Specifications
• Voltage Range: 0–80V DC
• Current Range: 0–20A DC
• Power Rating: 100W per channel; 200W total per module
• Input Resistance: 4.2 Ω (minimum)
• Voltage Load Regulation: <0.02% + 5 mV
• Current Load Regulation: <0.1% + 10 mA
• Voltage Measurement Accuracy: ±(0.2% + 0.5V)
• Current Measurement Accuracy: ±(0.4% + 10 mA)
• Voltage Display Resolution: 10 mV
• Current Display Resolution: 1 mA
• Dynamic Loading: Programmable to 20 kHz
• Slew Rate: Adjustable to 5A/µs
• Minimum Input Voltage: 1V DC
• Over Temperature Protection: 85°C
– Key Features
• Dual 100W input channels per module
• Four operating modes (CC, CV, CR, CP)
• Programmable transient loading to 20 kHz
• Short-circuit simulation capability
• 15-bit analog-to-digital conversion
• Multiple protective circuits (OPP, OCP, OTP, OVP)
– Typical Applications
• Power supply validation and characterization
• Battery discharge and load profiling
• Electronic system stress testing
• Transient response analysis
• Production acceptance testing
– Compatibility & Integration
The MML-80-20-102 is a plug-in module requiring either an MML-4 or MML-2 mainframe for operation. The mainframe provides power delivery and primary system control.
