SIEMENS 6ES7334-0KE00-0AB0

What is 6ES7334-0KE00-0AB0 and where is it used?

6ES7334-0KE00-0AB0 is an SM 334 analogue input/output assembly for SIMATIC S7-300. The module combines 4 analogue inputs with 2 analogue outputs and is designed for 0–10 V signals, Pt100 sensors in HVAC applications, and resistance measurements up to 10 kΩ. This makes the assembly particularly suitable for existing systems in which temperature acquisition, resistance evaluation and analogue setpoint generation need to be combined within a compact S7-300 solution. Typical areas of application include retrofit projects, spare parts procurement for operating production lines, and maintenance scenarios in which an existing SM 334 assembly must be replaced, repaired or stocked without extensive engineering effort.

Overview of the key technical data and what it means

From a technical perspective, the supported signal types are particularly important. The assembly operates with a 24 V DC load voltage, offers 12-bit resolution, typically requires 2 W of power dissipation, and processes 0–10 V, Pt100 HVAC and resistance signals up to 10 kΩ on the input side. 4–20 mA signals and thermocouples are explicitly not supported by this variant. On the output side, 2 short-circuit-protected 0–10 V voltage outputs are available; the minimum load resistance is 2.5 kΩ. In practice, this means that the module is well suited to conventional voltage and resistance signals, but it is not a universal assembly for all analogue standards. The maximum cycle time for all channels is 85 ms, and shielded cables of up to 100 m are supported.

Product status, life cycle status and obsolescence status

For purchasing and obsolescence management, it is important to note that Siemens classifies 6ES7334-0KE00-0AB0 as a spare part and assigns the PLM status PM400 – Announcement of product phase-out, effective from 01/10/2023. The module should therefore be included in an active spare parts and risk management strategy. Operators of S7-300 systems should secure availability, repairability and safety stock levels at an early stage. In the official Siemens product documentation reviewed, no clearly designated direct successor is specified for this standard variant. For operators, this means that a 1:1 replacement cannot be assumed indefinitely, making repair, stockholding and a planned migration strategy more important than an unplanned replacement purchase in the event of a fault.

Available EICHLER services and when they are relevant in practice

For this assembly, Repair, Exchange, Used and New are available from EICHLER. These services are particularly relevant when an operating S7-300 system must be returned to service quickly, the existing parameterisation needs to be retained, or a complete system conversion is currently not an option. Repair is a suitable choice when an existing assembly is to be maintained economically; it includes technical cleaning, preventive maintenance, comprehensive functional testing and a minimum 24-month warranty. Exchange helps to minimise breakdown times, while used and new assemblies are suitable for planned maintenance windows, spare stockholding and safeguarding critical production lines. EICHLER already lists all four service options specifically for this article number in its shop.

Is 6ES7334-0KE00-0AB0 still available or has it already been discontinued?

Siemens lists the assembly as a spare part and assigns the life cycle status PM400 – Product phase-out since 01/10/2023. For operators, this does not automatically mean that the module is no longer available, but the procurement risk is increasing. For this article number, EICHLER continues to offer Repair, Exchange, Used and New. This is important for purchasing and production because it helps to secure both unexpected breakdowns and planned stockholding strategies.

Which analogue signals does the assembly actually support?

The SM 334 with this article number supports 0–10 V on the input side, Pt100 sensors in HVAC applications, and resistance measurements up to 10 kΩ. On the output side, 2 analogue 0–10 V voltage outputs are available. 4–20 mA signals and thermocouples are not supported by this variant. For maintenance personnel, this is the key point to verify during spare part allocation, as many mix-ups occur when a module with current input or thermocouple functionality is expected, which this version does not technically provide.

Can I measure signals and output 0–10 V signals at the same time with this module?

Yes. This is exactly what the assembly is designed for: 4 analogue inputs and 2 analogue outputs are combined in a single module. This is particularly useful for compact applications where measured values need to be acquired while simultaneously outputting control or setpoint values as 0–10 V signals. However, it is important to note that the input channels cannot be combined completely freely. Siemens specifies fixed channel groups and permitted wiring combinations. Anyone ignoring these requirements during replacement or commissioning risks incorrect measurements or incorrect parameterisation.

Why do the documentation and project configuration sometimes refer to 2-wire/3-wire and sometimes to 4-wire Pt100 connections?

The general S7-300 analogue documentation describes resistance temperature detector connections for 2-wire, 3-wire and 4-wire configurations. However, in the module-specific parameter table for the SM 334 6ES7334-0KE00-0AB0, R-4L and RTD-4L are specified as the relevant measuring types and default settings. In practice, this means that the actual STEP 7 or TIA Portal parameterisation and the module-specific wiring diagram are decisive. If the sensor wiring and measuring method do not match, the result may be raw value errors, overflow indications or implausible temperature readings.

Which front connector and power supply are required for 6ES7334-0KE00-0AB0?

The assembly is designed for 1 × 20-pin front connector and requires a 24 V DC load voltage (L+). Siemens also specifies reverse polarity protection, a net weight of approximately 0.241 kg or around 200 g according to the manual, and dimensions of 40 × 125 × 117 mm. This information is relevant for procurement and service because, during replacement, not only the article number but also the connector layout, available rack space and existing power supply must be compatible.

When is a repair more economical than buying a new or used replacement?

Repair is usually the preferred option when the existing system is operating reliably, the parameterisation is known, and maintaining functionality quickly is more important than introducing new technology. In older S7-300 installations, this reduces the risk of unplanned modifications to the program, wiring or documentation. For this assembly, EICHLER combines repair with technical cleaning, preventive maintenance, functional testing and a minimum 24-month warranty. This is particularly attractive when the costs associated with production downtime, approval procedures and migration risks outweigh the cost of the hardware itself.

Is there a directly designated Siemens successor for this standard assembly?

In the official Siemens product sources reviewed, no clearly designated direct successor is specified for 6ES7334-0KE00-0AB0 in its standard version. Instead, Siemens classifies the product as a spare part and marks it as being in product phase-out. For decision-makers, it is therefore more important to establish a robust spare parts strategy: ensure repair capability, review critical stock levels, and plan the migration of the affected S7-300 functionality in good time rather than relying on a supposedly simple 1:1 successor in the event of a breakdown.