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Endress+Hauser FLOWTEC 321437‑0200D (Spare‑part No.50105438) Power Supply Board

Warranty： 365 days
Quality: Original module
Condition： New / Used
Warehouse: Spot
Delivery time: Shipped in 3 days after payment
Mailbox：plcvarious@foxmail.com

+086 18205988494

Introduction

Main Functions

Input Power Conversion & Isolated Power Distribution Accepts external AC or DC mains power input for flow transmitter. Completes rectification, filtering and isolated DC‑DC conversion, generates multiple stable isolated DC voltage rails to supply main board, display module and internal electronic circuits of the flow transmitter. Provides galvanic isolation between field mains power and measurement electronics to suppress power‑line noise interference.
Over‑voltage, Over‑current and Short‑circuit Protection Integrates fuse, surge absorption and protective circuit components. Triggers hardware protection against input surge, overload and short‑circuit faults. Prevents damage to the main measurement board caused by power‑grid abnormality.

Endress+Hauser FLOWTEC 321437‑0200D Power Supply Board

Stable Power for Measurement Circuitry Delivers clean, low‑ripple power to flow signal acquisition, sampling and computing circuits. Maintains measuring accuracy by avoiding power fluctuation‑induced measurement drift.
Internal Inter‑module Connection Connects with transmitter main board and display unit via dedicated internal connectors. Transfers power rails and auxiliary status signals inside the transmitter housing.
Power‑related Fault Diagnosis Cooperates with transmitter main‑board diagnosis logic. Reports power‑supply failure, under‑voltage or over‑voltage status, triggers device alarm codes for on‑site maintenance troubleshooting.

Note: 321437‑0200D (50105438) is EOL (End‑of‑Life) legacy aftermarket spare part. It cannot operate independently; it must be assembled together with matching main board inside original E+H FLOWTEC flow transmitter housing. Original OEM mass‑production has been discontinued.

Endress+Hauser FLOWTEC 321437‑0200D Power Supply Board

Applications

This power supply board is a dedicated replacement spare component for old‑generation Endress+Hauser FLOWTEC flow transmitters:

Industrial process flow metering: supports electromagnetic flow meters and other flow transmitters in chemical, water‑waste‑water, pulp‑paper and utility plants.
Pipeline flow monitoring: provides stable power supply for flow measuring instruments for volume measurement, totalizing and dosing control.
On‑site instrument maintenance & retrofit: direct replacement for defective original power board on existing FLOWTEC flow transmitters, restores instrument power‑on and full measurement functions.
Industrial automation system: enables flow transmitters to output 4‑20 mA, pulse signals to PLC / DCS for process monitoring and closed‑loop regulation.