SIEMENS SIMATIC SIWAREX WP321 WEIGHING ELECTRONIC Bangladesh. Mlfb-7MH4138-6AA00-0BA0 price

The Siemens 7MH4138-6AA00-0BA0 is the TM SIWAREX WP321 ST, a single-channel weighing module for the SIMATIC ET 200SP system. It is intended for platform and hopper scales using analog load cells or full-bridge strain gauges. The module provides one load-cell interface covering the 1–4 mV/V range and one RS-485 interface for communication. The current Siemens technical documentation identifies Base Unit type A0, firmware V1.4.3 and hardware functional status FS04. It operates from 24 V DC with a permissible range of 19.2–28.8 V DC and supports STEP 7/TIA Portal V14 or higher. The module provides 600 Hz sampling, measuring ranges of ±1, ±2 and ±4 mV/V, and diagnostic functions including supply monitoring, wire-break and short-circuit detection.

2. Technical Specification

Specification	Details
Manufacturer	Siemens
Product Code	7MH4138-6AA00-0BA0
Product Family	TM SIWAREX WP321 ST weighing electronics
Product Type	SIMATIC ET 200SP single-channel weighing module
Supply Voltage	24 V DC; 19.2–28.8 V
Current Consumption	Max. 100 mA
Load Cell Input	1; full-bridge strain gauges
Load-Cell Range	-1 to +1, -2 to +2, -4 to +4 mV/V
RS-485	Yes; up to 115.2 k bit/s
Sampling Rate	600 Hz
Base Unit	BU type A0
Dimensions	15 × 57 × 72 mm
Weight	Approx. 31 g
Operating Temperature	-25 to +60 °C horizontal; -25 to +50 °C vertical
Firmware	V1.4.3; firmware update possible

3. Key Features

• Single-channel weighing module for ET 200SP.
• Designed for platform and hopper scales.
• Supports full-bridge strain gauges with 4- or 6-conductor connection.
• One RS-485 interface with up to 115.2 k bit/s transmission.
• 600 Hz weighing signal sampling.
• Measuring ranges from ±1 to ±4 mV/V.
• 24 V DC operating supply.
• Short-circuit and reverse-polarity protection.
• Diagnostic alarms and hardware interrupts.
• Supply-voltage, wire-break and short-circuit diagnostics.
• Compatible with SIMATIC S7 and standard PROFINET controller environments.

4. Typical Application

• Platform weighing systems.
• Hopper scales.
• Industrial weighing equipment.
• Static weighing applications.
• ET 200SP-based weighing stations.
• Automated material handling and weighing processes.

5. Product Highlights

The WP321 ST provides dedicated weighing functionality in a compact 15 mm ET 200SP module. Its single-channel load-cell interface, RS-485 communication, 600 Hz sampling and integrated diagnostics make it suitable for static weighing applications integrated into SIMATIC automation architectures. The module also supports both 4-conductor and 6-conductor full-bridge strain-gauge connections.

6. Important Ordering & Installation Information

Order number 7MH4138-6AA00-0BA0 must be matched with the specified BU type A0 Base Unit. The module requires 24 V DC within the documented 19.2–28.8 V range. Siemens specifies STEP 7/TIA Portal V14 or higher and GSDML V2.34 for PROFINET engineering. Verify the installed hardware and firmware status before commissioning or replacement.

Always follow the manufacturer's official installation, wiring, commissioning and safety instructions.

7. Why Choose Siemens 7MH4138-6AA00-0BA0 SIWAREX WP321 ST Weighing Module?

The WP321 ST is appropriate for applications requiring a dedicated weighing interface inside an ET 200SP architecture. Its full-bridge load-cell support, 600 Hz sampling, RS-485 communication and integrated diagnostic functions allow weighing signals to be incorporated into a broader SIMATIC automation system without using a separate standalone weighing controller.

8. Product Summary

The Siemens 7MH4138-6AA00-0BA0 TM SIWAREX WP321 ST is a single-channel ET 200SP weighing module designed for platform and hopper scales. It accepts analog full-bridge strain-gauge signals and supports measuring ranges of ±1, ±2 and ±4 mV/V. The module includes RS-485 communication up to 115.2 k bit/s, 600 Hz sampling, 24 V DC operation and diagnostic monitoring. It uses Base Unit type A0 and supports STEP 7/TIA Portal V14 or higher. With its compact 15 mm width and documented S7/PROFINET compatibility, it is suited to integrating static weighing functions into Siemens automation systems.

Product Code: 7MH4138-6AA00-0BA0
Manufacturer: Siemens
Product Family: TM SIWAREX WP321 ST weighing electronics
Product Type: SIMATIC ET 200SP single-channel weighing module