PLCs, Power Supplies & Others

Overview of the Yokogawa MHC-50*A Signal Conditioner Nest Fan Unit

The MHC-50*A serves as a signal conditioner nest fan unit within Yokogawa’s control system hardware. This unit delivers forced air cooling to signal conditioner nests and their installed cards. Engineers deploy it in process plants that demand stable thermal conditions for sensitive electronics.

Key Technical Specifications of the MHC-50*A

The MHC-50*A pairs a compact fan housing with a dedicated mounting frame. Below you will find the core parameters that define this unit’s performance envelope.

Physical Design and Interface Details

The MHC-50*A adopts a slim frame that fits standard signal conditioner nests. Its dimensions measure 200 mm in length, 120 mm in width, and 50 mm in depth. Moreover, the unit weighs roughly 550 grams, which simplifies mounting and field replacement. Screw terminals accept 24 V DC power without specialized connectors.

Performance and Cooling Capabilities

This unit houses two axial fans that move roughly 2.4 m³/min of air. Each fan spins at approximately 2700 rpm to maintain steady airflow. Additionally, the assembly keeps acoustic noise near 42 dB(A) for quieter control rooms. Consequently, it protects signal conditioner cards from heat buildup in dense cabinets.

Power and Environmental Considerations

The MHC-50*A operates on a 24 V DC nominal power supply. Power consumption remains approximately 6 W during normal operation. The operating temperature range spans 0°C to 55°C for industrial environments. Storage temperature extends from -20°C to 70°C. Furthermore, humidity tolerance reaches 95% RH without condensation.

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