The Honeywell 2MLF-HD2A is a premium high-speed pulse input module designed for MasterLogic-200 / ML200R PLC systems. Built with a differential (line-drive) input mechanism, this 2-channel module captures high-precision pulses — up to 500 kHz per channel — making it ideal for encoders, motion control, and high-frequency applications.

Equipped with advanced digital filtering (160–64,000 ms), overload protections, and conformal coating for durability, it ensures top-tier performance in demanding industrial environments. Its compact design and OEM reliability make it an essential choice for automation engineers.

Key Specifications

• Input Type: Differential line-drive (RS-422A / HTL) with a capture rate up to 500 kHz 

• Channels: 2 independent, high-speed channels 

• Signal Support: A-phase, B-phase quadrature signals; CW/CCW modes; ring and linear counting with carry/borrow 

• Filtering: Digital, adjustable between 160 ms and 64,000 ms 

• Power Draw: Approx. 5 V @ 450 mA 

• Physical: Compact, conformal-coated module weighing approx. 150 g 

• Environment: Built for resilience in harsh industrial conditions — South Korea origin