Siemens 6ES5498-1AA71 Measuring Range Module

Siemens 6ES5498-1AA71 Measuring Range Module Overview

The Siemens 6ES5498-1AA71 is a measuring range module (also known as a signal module or input conditioning module) for analog inputs within the SIMATIC S5 Programmable Logic Controller (PLC) system. Specifically, it is designed to convert 4-20mA current signals from 4-wire transducers (transmitters) into a usable format for the SIMATIC S5 analog input modules.

This module is not a standalone analog input card, but rather an accessory or sub-module used in conjunction with a compatible SIMATIC S5 analog input module to allow it to correctly read 4-20mA signals from 4-wire transmitters.

Product Detailed Description

• Function: The primary function of the 6ES5498-1AA71 is to adjust the measuring range and signal conditioning for specific 4-wire, 4-20mA analog current inputs. It ensures that the current signal from a field transducer is correctly scaled and presented to the SIMATIC S5 analog input module, allowing the PLC to accurately process the incoming process variable (e.g., pressure, flow, temperature).

• Application Specificity: It is designed specifically for 4-wire transducers that output a 4-20mA current signal. A 4-wire transducer typically has two wires for power supply and two separate wires for the current output signal. This module handles the specific requirements of such transducers to ensure proper signal integration with the S5 system.

• Role in S5 System: In the SIMATIC S5 architecture, various analog input modules (e.g., 6ES5464-8MA11, 6ES5465-...) would exist. This 498 measuring range module would be inserted into or connected to specific channels of these analog input modules to adapt them for the 4-20mA, 4-wire signal type.

Product Parameters

(Note: As an older, specialized sub-module, detailed standalone parameters are less common than for full I/O modules. The key parameter is its intended signal type.)

• Module Type: Measuring Range Module for Analog Inputs

• Input Signal Type: +4 to 20 mA (current signal)

• Transducer Type Compatibility: 4-wire transducers/transmitters

• System Compatibility: Siemens SIMATIC S5 PLC series (e.g., S5-100U, S5-115U, S5-135U, S5-155U, depending on the specific analog input module it pairs with).

• Purpose: Signal conditioning and range adaptation.

• Connection: Likely plugs into specific slots/terminals on a compatible SIMATIC S5 analog input module.

• Part Number: 6ES5498-1AA71

• Status: Spare part / Obsolete product line (end of life by Siemens as of Oct 1, 2020).

Product Advantages (Historical Context)

• Compatibility with S5: Allowed existing SIMATIC S5 installations to interface with a common industrial standard (4-20mA, 4-wire transducers).

• Signal Integrity: Provided necessary conditioning for accurate analog signal acquisition within the S5 PLC.

• Modular Design: As part of the modular S5 system, it offered flexibility to configure analog inputs for specific sensor types.

• Robustness: Typical for Siemens industrial components, designed for reliable operation in industrial environments of its era.

Precautions

• Obsolescence: The most significant precaution is that the SIMATIC S5 product line, including this module, is obsolete. Siemens no longer provides support, spare parts, or repairs for it. Relying on such components for new or critical installations carries high risk due to potential lack of replacements and expertise.

• Compatibility: This module is strictly for specific SIMATIC S5 analog input modules and 4-wire, 4-20mA transducers. It cannot be used with other PLC systems or different signal types.

• Wiring: Adhere strictly to the wiring diagrams provided in the manual for the specific SIMATIC S5 analog input module with which this measuring range module is used. Incorrect wiring can damage the module, PLC, or transducer.

• Grounding and Shielding: Proper grounding and shielding practices are essential for analog signals to prevent noise and ensure accuracy.

• Troubleshooting: Troubleshooting issues with obsolete hardware can be challenging due due to limited documentation and support.

• Migration Recommendation: For any new or significant upgrades, Siemens strongly recommends migrating from SIMATIC S5 to the current SIMATIC S7 generation (e.g., S7-1500), which offers modern features, better performance, long-term support, and improved connectivity.

Product Applications (Historical Context)

Historically, the Siemens 6ES5498-1AA71 would have been used in various industrial automation applications where 4-wire, 4-20mA current loop transducers were employed to measure continuous process variables and feed them into a SIMATIC S5 PLC for control and monitoring. Examples include:

• Process Control:

• Measuring pressure (e.g., in pipelines, tanks).

• Monitoring flow rates (e.g., in chemical processes, water treatment).

• Sensing temperature (e.g., in ovens, reactors, HVAC systems).

• Detecting liquid levels in tanks.

• Manufacturing Automation:

• Quality control applications where analog sensor feedback (e.g., tension, position) was required.

• Machine control systems needing continuous variable inputs.

• Energy Management:

• Monitoring consumption parameters from analog sensors.

In essence, it enabled the SIMATIC S5 to integrate a common type of industrial sensor into its control logic.

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