SIEMENS 6ES5470-4UC12
- EICHLER-art.no.: K0136417
- EAN: 4025515116332
Product description
SIMATIC S5 470 ANALOG OUTPUT MODULE FLOATING, COMPACT VERSION U 8 OUTPUTS +1 TO 5V, +4 TO 20MA
Services for SIEMENS 6ES5470-4UC12
SIEMENS |
6ES5470-4UC12 –
additional product information
| Delivery information | |||
|---|---|---|---|
| Export identifier | AL: ECCN: | ||
| Net weight | 0.588 | ||
| Quantity | 1 Stück | ||
| Packaging quantity | 1 | ||
| Additional product information | |||
|---|---|---|---|
| Product status | EOP: 1997-10-01 | ||
| EAN | 4025515116332 | ||
| UPC | / | ||
| Static lot number | 85389091 | ||
| List indicator | / | ||
| Product group | 4309 | ||
| Country of origin | DE | ||
| Compliance with the substance restrictions according to RoHS directive | Since: / | ||
| Product classifications | Version | Classification | |
|---|---|---|---|
| eClass | 4 | / | |
| eClass | 5.1 | / | |
| eClass | 6.0 | / | |
| ETIM | 3 | / | |
| ETIM | 4 | / | |
| ETIM | 5 | / | |
What is 6ES5470-4UC12 and where is it used?
The 6ES5470-4UC12 is a SIMATIC S5 analogue output module 470 from Siemens in compact U design. The module provides 8 electrically isolated analogue outputs and is used in classic SIMATIC S5-135U and S5-155U environments where digital setpoints from the PLC must be converted into analogue process signals. Typical applications include the control of valves, actuators, drives, dosing systems, process controllers and analogue indicators. For maintenance personnel, the module is particularly relevant when existing S5 systems must remain in operation and a failure of the analogue output module would directly lead to production disruptions, missing setpoints or limited process control. Thanks to its galvanic isolation, the module is especially suitable for signal circuits where reliable isolation between the control system and the field side is required.
Overview of the key technical data and what it means
The 6ES5470-4UC12 is designed for +1 to +5 V and +4 to +20 mA output signals and is therefore particularly suitable for many classic process signals in existing installations. Siemens specifies 8 voltage and current outputs, 12-bit value representation, ±0.2% linearity, an operating error limit of ±0.6% within the temperature range of 0 to 60°C, and a response time of no more than 5 ms to reach more than 99% of the output value. In practice, this means that the module can output setpoints with relatively high accuracy and speed. Wiring requirements are also important: the voltage output requires a minimum load of 3.3 kΩ, while the current output supports a maximum load of 300 Ω. The analogue section is supplied via 24 V load voltage and additionally requires the F+/F− enable signal.
Product status, life-cycle status and obsolescence
For operators of S5 systems, the life-cycle status of this module is a key consideration. The EICHLER product page lists the 6ES5470-4UC12 with an EOP date of 01 October 1997. Siemens also classifies the part number as discontinued without a replacement product. This clearly indicates that there is no verified manufacturer-designated successor that would allow a straightforward migration without further evaluation. For purchasing and maintenance departments, this represents an increased obsolescence risk. Companies that need to operate their systems over the long term should establish strategies for repair, replacement and spare-part stockholding at an early stage to avoid extended downtime or costly modifications to analogue signal circuits in the event of a failure.
Available EICHLER services and when they are relevant
For the 6ES5470-4UC12, EICHLER offers repair, exchange, used units and new units, with an optional test report for analogue inputs/outputs. This is particularly relevant for obsolete S5 modules. Repair is the preferred option when the existing module should remain installed in the machine and the application software, wiring and interfaces must remain unchanged. Exchange services are advantageous when downtime is critical and a replacement is required as quickly as possible. Used or new units are of particular interest to purchasing and maintenance departments when building strategic spare-part inventories or restarting a system at short notice. According to EICHLER, repair services include technical cleaning, preventive maintenance, comprehensive functional testing and a minimum 24-month warranty. These services help maintain the operational reliability of existing installations even when the original manufacturer has long since discontinued the product.
| Fault description | Possible solution |
|---|---|
| Why does the S5 report an acknowledgement timeout (QVZ) or why do the outputs not respond on the 6ES5470-4UC12? | First check the F+/F− enable signal, ensure that the front connector is properly seated and verify that the module has only been inserted or removed while the enable circuit was active. Siemens notes that a missing enable signal or a disconnected front connector can result in an acknowledgement timeout being reported. Afterwards, check the 24 V load voltage, the enable wiring and the programmed response within the QVZ OB. |
| Why is there no 4–20 mA signal present at the 6ES5470-4UC12 output? | Verify that the installed module is actually the UC version for 1–5 V / 4–20 mA, that the 24 V load voltage is available and that the connected load does not exceed 300 Ω. An open current loop, incorrect wiring or excessive load resistance can prevent the setpoint signal from reaching the connected device correctly. Also check that measurements are being taken at the correct terminals and that the enable signal is active. |
| Why does one channel output the wrong value or why does the setpoint appear on the wrong output? | On S5 analogue modules, each channel occupies one word, and the sub-address is determined by the start address + 2 × channel number. For 8-channel modules, the start address must therefore be configured correctly. Check the address switches, labelling and the STEP 5 program. Even a single incorrect start address or writing to the wrong output word can cause a setpoint to appear on the wrong channel or produce apparently implausible values. |
| Why does the analogue value fluctuate sporadically or why does a drive receive incorrect setpoints during night operation? | Separate the troubleshooting process into the module itself and the downstream signal conditioning circuitry. A practical approach is to record the 0/4–20 mA signal directly at the module output while simultaneously monitoring the signal downstream of any isolating amplifier or signal converter. This makes it possible to determine whether the fault originates within the module or further along the signal path. For intermittent faults, comparing channels or temporarily replacing the module with a known-good unit can also help identify the root cause. |
| Why does the CPU enter STOP mode as soon as the analogue output module is inserted? | First read the diagnostic information or determine the exact STOP cause, then check the wiring, addressing and connected load circuits. In similar cases discussed within the PLC community, testing the CPU without the analogue module installed, verifying the correct measurement points and comparing the wiring against the official documentation were recommended. In many cases, the issue is not caused by the setpoint data itself but rather by wiring errors, incorrect address assumptions or a faulty load connection. |
What exactly is 6ES5470-4UC12?
The 6ES5470-4UC12 is an 8-channel analogue output module from the SIMATIC S5 product family. It belongs to the 470 analogue output series in compact U design and is designed for output ranges of +1 to +5 V and +4 to +20 mA. The module is used to convert digital setpoint values from the PLC into analogue process signals for field devices. It is therefore a typical module for existing installations in which continuous control signals must be supplied to valves, drives or controllers.
Is 6ES5470-4UC12 suitable for 4–20 mA setpoint signals?
Yes. This is exactly the purpose of the UC version. Siemens specifies output ranges of 1 to 5 V and 4 to 20 mA for the 6ES5 470-4UC12. This makes the module particularly suitable for many traditional process signals used in process engineering and machine-building applications. It is important not to confuse the module with the 4UA12 or 4UB12 variants, as these support different signal ranges.
Is there an official Siemens successor for 6ES5470-4UC12?
No. Siemens lists this part number as discontinued without a replacement product. In addition, the EICHLER product page shows an EOP date of 01 October 1997. For operators, this means that no direct manufacturer-approved successor part number is available. In the event of a failure, the main options are therefore repair, exchange services or the strategic stocking of compatible legacy spare parts.
Which EICHLER services are useful for 6ES5470-4UC12?
For this module, EICHLER offers repair, exchange, used units and new units. Repair is particularly valuable when an existing machine must continue operating without modifications to the program, wiring or signal type. An optional test report for analogue inputs/outputs is also available. EICHLER describes its repair process as including technical cleaning, preventive maintenance, comprehensive functional testing and a minimum 24-month warranty. This is especially beneficial for obsolete S5 modules where maintaining system availability is a priority.
How can I identify whether 6ES5470-4UC12 is the correct 470-series variant?
The safest method is to verify the signal range. Siemens clearly differentiates between the variants: 4UA12 supports 0 to ±10 V and 0 to 20 mA, 4UB12 supports ±10 V, and 4UC12 supports 1 to 5 V and 4 to 20 mA. Therefore, if an existing S5 application requires a 4–20 mA output signal, it is important to confirm that the installed module is specifically the UC variant. This check helps prevent ordering errors and reduces the risk of incompatibilities during replacement.
When is repair a better option than a system modification?
Repair is particularly worthwhile when the installation must remain operational and a conversion to different signal types, new modules or modified PLC logic would be disproportionate in terms of cost and effort. Since Siemens does not specify an official successor, repair is often the fastest way to preserve compatibility, signal behaviour and the original machine concept. In such cases, a repaired or exchanged legacy module is frequently more economical than making extensive changes to the control system, wiring and documentation.
