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Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 6ES5470-4UC11 |
| Manufacturer | Siemens (Germany) |
| Product Type | Analog Output Module (SM 470) |
| PLC Series | SIMATIC S5 (S5-115U/135U/155U) |
| Number of Outputs | 8 analog output channels |
| Output Voltage Range | ±10 V |
| Output Current Range | 0-20 mA (field configurable, commonly used as 4-20 mA) |
| Resolution | 12-bit (4096 counts) |
| Isolation Type | Floating/Galvanically isolated (Potentialgetrennt) |
| Output Load (Voltage) | ≥ 5 kΩ minimum load resistance |
| Output Load (Current) | ≤ 500 Ω maximum load |
| Short-Circuit Protection | Outputs tolerant to short circuit per S5-470 specification |
| Conversion Time | ≤ 1.5 ms per channel typical |
| Backplane Current (5V) | ≤ 100 mA typical |
| Dimensions (Compact U) | Approx. 40 mm width x 255 mm height x 195 mm depth |
| Net Weight | Approx. 0.48 kg |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -25°C to +70°C |
| Front Connector Type | 48-pin for field device wiring |
| Configuration | DIP switches for base address assignment |
| Programming Environment | STEP 5 |
| RoHS Status | Legacy product, not RoHS compliant |
| Product Lifecycle | PM490/PM500 – Discontinued, no direct replacement |
Main Features and Advantages
Versatile output range configuration: The Siemens 6ES5470-4UC11 provides 8 independent analog output channels configurable for either ±10V voltage output or 0-20mA current output, offering exceptional flexibility for interfacing with a wide variety of field actuators. This dual-range capability allows the 6ES5470-4UC11 to directly drive variable frequency drives for motor speed control via ±10V signals, proportional valves and servo actuators for hydraulic/pneumatic positioning, and valve positioners with 4-20mA loop current outputs . In many legacy S5 installations, the Siemens 6ES5470-4UC11 is found paired with the 6ES5463-4UA13 analog input module—one collecting transmitter signals, the other issuing setpoints, forming the complete analog control loop .
Floating isolation architecture: The Siemens 6ES5470-4UC11 features floating (galvanically isolated) outputs that create a robust electrical barrier between the field-side analog signals and the S5 backplane logic. This floating design effectively protects the CPU and system electronics from ground loops, common-mode voltages, and electrical noise that are endemic to industrial environments . The isolation of the 6ES5470-4UC11 ensures that output signals remain accurate and stable even when field devices are located at significant distances from the control cabinet or when multiple actuators share different ground references, reducing signal degradation and improving overall system reliability.
High-density output capacity: The Siemens 6ES5470-4UC11 integrates 8 analog output channels into a single compact module, significantly reducing the number of modules required for large-scale control applications. This high-density design minimizes cabinet space requirements and simplifies system wiring in applications where multiple analog control loops must be supported. The 6ES5470-4UC11 is the most versatile choice in the S5 AO portfolio for applications requiring both voltage and current outputs—a single module type can handle both applications without requiring different hardware versions .
Short-circuit protection and reliability: The Siemens 6ES5470-4UC11 incorporates comprehensive short-circuit protection on all output channels, with the module designed to tolerate output short circuits to VZ or MA as per S5-470 specifications . This robust protection ensures that field wiring faults do not propagate to damage the module or the backplane electronics, reducing downtime and maintenance costs. A capacitor bank on the analog power rail filters noise and reduces measurement errors from power supply fluctuations, ensuring consistent performance.
German engineering and long-term reliability: Manufactured in Germany to Siemens’ exacting quality standards, the 6ES5470-4UC11 is constructed with industrial-grade components rated for continuous operation in harsh environments. The module’s compact U-shaped housing facilitates efficient installation in standard S5 racks, with a typical 5V backplane consumption of only 100 mA. The 6ES5470-4UC11 supports address assignment via DIP switches near the backplane connector, allowing flexible placement within the I/O addressing scheme .
