Siemens SIWAREX CS 7MH4910-0AA01 Calibratable Weighing Electronics

Overview

Siemens · SIWAREX CS

7MH4910-0AA01 Calibratable Weighing Electronics

Siemens 7MH4910-0AA01 is SIWAREX CS calibratable weighing electronics for one scale in SIMATIC ET 200S, with RS232 for PC commissioning and a TTY output for a remote display.

At a Glance

Brand	Siemens
Model	7MH4910-0AA01
Product Type	Calibratable weighing electronics
Core Function	Processes one strain-gauge scale and transfers weight values into SIMATIC ET 200S
Application or Compatible Series	SIMATIC ET 200S with IM151-1 Basic, Standard or High Feature, or IM151-7 CPU

ET 200S Integration

Use an approved IM151-1 head station or IM151-7 CPU and reserve 8 bytes in the peripheral range.

Scale Connection

Match the strain-gauge signal range, load-cell resistance and shielded wiring to the module limits.

Commissioning Interfaces

Use RS232 with SIWATOOL CS for setup and the passive TTY output for a compatible remote display.

Product Overview

Siemens 7MH4910-0AA01 is SIWAREX CS calibratable weighing electronics for one scale in SIMATIC ET 200S, with RS232 for PC commissioning and a TTY output for a remote display.

The module converts one load-cell signal at 50 Hz with 65,535-part internal resolution and a documented error limit of 0.05%. Three measuring ranges, configurable digital filtering and theoretical adjustment support static weighing and force-measurement tasks. An isolated RS232 port connects a commissioning PC, while the isolated TTY transmitter drives a compatible remote display.

Ordering focus: confirm the complete article number, ET 200S head-station type and version, 30 mm terminal module, load-cell range and resistance, shield connections, and saved scale parameters.

Key Functions

High-Resolution Weight Acquisition

The module converts one load-cell signal at 50 Hz with 65,535-part internal resolution and a documented error limit of 0.05%.

Flexible Scale Adjustment

Three measuring ranges, configurable digital filtering and theoretical adjustment support static weighing and force-measurement tasks.

Integrated Setup and Display Links

An isolated RS232 port connects a commissioning PC, while the isolated TTY transmitter drives a compatible remote display.

Official Specifications

Rated Supply Voltage	24 V DC from PM-E power module
Static Supply Limits	20.4 to 28.8 V DC
Dynamic Supply Limits	18.5 to 30.2 V DC
Non-Periodic Overvoltage	35 V DC for 500 ms with 50 s recovery
Maximum Current Consumption	150 mA
Typical Power Loss	5 W
ET 200S Backplane Current	Typically below 10 mA
Calibration Accuracy	Class III, 2000 d (pi = 0.4)
Error Limit	At most 0.05% at 20 °C ±10 K
Measurement Update Rate	50 Hz
Internal Resolution	65,535 parts
Load-Cell Signal Ranges	0 to 1, 0 to 2 and 0 to 4 mV/V
Load-Cell Excitation	Typically 6 V DC, maximum 68 mA
Permitted Load-Cell Resistance	87 to 4010 Ω with the module or SIWAREX IS interface
Low-Pass Filter Cutoff	0.05 to 5 Hz
Average Filter Length	2 to 255 measured values at 20 ms per value
RS232 Interface	9600 baud, 8 data bits, even parity, 1 stop bit, 15 m maximum, 500 V DC isolation
TTY Interface	Passive TxD at 9600 baud, 8E1, 125 m maximum at 20 mA, 25 mA maximum loop current, 500 V DC isolation
Module Dimensions	30 × 80 × 50 mm
Technical Weight	75 g

Official source:Siemens official technical data for 7MH4910-0AA01.

Frequently Asked Questions

Which ET 200S head stations can I use with 7MH4910-0AA01?

Use an IM151-1 Basic, Standard or High Feature head station, or an IM151-7 CPU at the specified version level.

How do I connect a commissioning PC to 7MH4910-0AA01?

Connect the PC to the isolated RS232 interface and use SIWATOOL CS for scale setup and diagnostics.

Can 7MH4910-0AA01 drive a remote weight display?

The passive TTY transmitter is intended for a compatible remote display and supports a maximum line length of 125 m at 20 mA.

Which load-cell signals can 7MH4910-0AA01 measure?

The module provides selectable ranges of 0 to 1, 0 to 2 and 0 to 4 mV/V for strain-gauge load cells.

What should I preserve when replacing 7MH4910-0AA01?

Save the scale parameters, record the terminal wiring and retain the ET 200S hardware configuration before removing the module.

Which terminal module is required for 7MH4910-0AA01?

Install it on a 30 mm TM-E terminal module such as 6ES7193-4CG20-0AA0 and maintain the specified shielding connections.

Can 7MH4910-0AA01 be used in hazardous areas?

The module can be used in Zone 2 under the stated installation conditions, while Zone 1 load cells require the optional SIWAREX IS interface.

Compatibility & Ordering Notes

Before ordering 7MH4910-0AA01: confirm the complete article number, ET 200S head-station type and version, 30 mm terminal module, load-cell range and resistance, shield connections, and saved scale parameters.

Compatibility Checklist

• Use an approved IM151-1 head station or IM151-7 CPU at the specified version level.
• Install the module on a 30 mm TM-E terminal module and preserve the required shield connections.
• Verify the load-cell signal range, load resistance and permitted cable distance.
• Back up the scale parameters and retain the ET 200S hardware configuration before replacement.
• Confirm whether RS232 commissioning, a TTY display or the SIWAREX IS interface is required.

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