Product Overview

The SIEMENS 6ES5470-8MA11 is a compact floating analog output module from the SIMATIC S5 programmable logic controller series, specifically engineered to convert digital output values from the CPU into precise ±10 V DC analog voltage signals . This module, also identified by the ordering code 6ES5 470-8MA11, features two independent output channels and is designed for integration with the S5-90U, S5-95U, S5-100U, ET 100U, and ET 200U platforms . As a member of the 470 series, the SIEMENS 6ES5470-8MA11 provides critical analog output capability for controlling voltage-input devices such as variable frequency drives, proportional valve amplifiers, positioning cards, and chart recorders .

The floating output architecture of the SIEMENS 6ES5470-8MA11 provides galvanic isolation between the output circuits and the S5 backplane, delivering superior signal stability and protection against electrical noise and ground potential differences . A standout feature of the SIEMENS 6ES5470-8MA11 is its four-wire sensing capability, which allows voltage regulation directly at the load by compensating for up to approximately 3 V per line in the connecting cables . This ensures that the output voltage at the load is precisely maintained even over cable runs up to 200 meters. With its 11-bit plus sign digital representation and conversion time of under 0.15 ms for full-scale changes, the SIEMENS 6ES5470-8MA11 delivers responsive, high-resolution analog control for demanding industrial applications .

 

Technical Specifications

Parameter Name	Parameter Value
Product Model	6ES5470-8MA11 (also 6ES5 470-8MA11)
Manufacturer	Siemens
Product Type	Analog Output Module (Floating)
Series	SIMATIC S5 (470 Series)
Compatible Systems	S5-90U, S5-95U, S5-100U, ET 100U, ET 200U
Number of Outputs	2 Channels
Output Range	±10 V DC (bipolar)
Output Type	Floating / Galvanically Isolated
Minimum Load Resistance	3.3 kΩ
Digital Representation	11 bits + sign (two’s complement)
Resolution	Approx. 4.88 mV per LSB
Conversion Time (Full-Scale)	Max. 0.15 ms
Short-Circuit Protection	Yes, with max. current limit ±30 mA
Four-Wire Sensing	Yes (S+ and S- sense lines)
Compensation per Sense Line	Approx. 3 V
Permissible Overload	25%
Basic Error Limit	±0.3%
Operational Error Limit	±0.6% (0 to 60°C)
Linearity Error	±0.2%
Temperature Coefficient	±0.01%/K
Supply Voltage (L+)	24 V DC (20 to 30 V DC, ≤3.6 V p-p ripple)
Current Consumption (from +9 V CPU)	Approx. 120 mA
Current Consumption (from L+)	Approx. 100 mA
Power Loss	Approx. 3.1 W
Max. Cable Length (Shielded)	200 m
Operating Temperature	0 to 60°C
Module Dimensions	Approx. 10 x 5 x 13 cm
Module Weight	Approx. 0.22 – 0.30 kg

 

Main Features and Advantages

The SIEMENS 6ES5470-8MA11 delivers exceptional control precision through its combination of floating isolation, high-resolution conversion, and unique four-wire sensing capability. The floating output architecture of the SIEMENS 6ES5470-8MA11 provides galvanic isolation between the field outputs and the S5 backplane, protecting the CPU from electrical disturbances that could otherwise cause erratic behavior or damage . This isolation is particularly valuable in large distributed control systems where multiple power supplies create ground potential differences, ensuring that the SIEMENS 6ES5470-8MA11 delivers stable, interference-free signals even in electrically noisy industrial environments.

The four-wire sensing feature is a standout capability of the SIEMENS 6ES5470-8MA11, allowing the module to compensate for voltage drops in the connecting cables. By using the dedicated S+ and S- sense lines connected directly at the load, the SIEMENS 6ES5470-8MA11 regulates the output voltage precisely at the point of application, compensating for up to 3 V per line . This is critical for long cable runs where voltage drop could otherwise compromise signal accuracy, making the SIEMENS 6ES5470-8MA11 ideal for remote actuator control applications.

The SIEMENS 6ES5470-8MA11 uses an 11-bit plus sign digital representation, providing approximately 2048 discrete output steps over the ±10 V range with 4.88 mV resolution . Combined with a rapid conversion time of under 0.15 ms for full-scale changes, the SIEMENS 6ES5470-8MA11 delivers both the resolution and responsiveness needed for high-performance closed-loop control . The module’s built-in short-circuit protection with current limiting to ±30 mA and overload tolerance of 25% provide robust protection against field wiring faults . With basic error limits of ±0.3% and operational limits of ±0.6% over the full temperature range, the SIEMENS 6ES5470-8MA11 ensures consistent output accuracy throughout its service life .