Product Overview

The 6ES5470-8MB11​ is an analog output module from the Siemens SIMATIC S5 470 subseries, configured as an 8-channel floating (galvanically isolated) AO card in the compact mechanical envelope targeting S5-90U, S5-95U, S5-100U local CPUs and the distributed ET 100U / ET 200U stations. Each of the 8 outputs on the 6ES5470-8MB11​ can be configured for ±10 V voltage mode or ±20 mA current mode (some sourcing documentation also lists 0–20 mA / 4–20 mA via the S5 standard AO scaling FB), with 12-bit + sign resolution delivered through the S5 peripheral output (PQ) image. The “-8” prefix in the ordering code is the critical differentiator: it locks the 6ES5470-8MB11​ to the compact S5 rack footprint (shorter PCB, different backplane pinning) used in 90U/100U door-mount and wall-mount panels, as opposed to the “-7” prefixed 470-7LA11 which serves the S5-115U/F central racks. Mixing these up is the #1 procurement error—mechanically they look nearly identical but the backplane and HW-config mapping differ.The 6ES5470-8MB11​ is a floating-design module: each output channel is galvanically isolated from the S5 backplane and from neighboring channels (within group limits per S5 470 spec), making it suitable for driving actuators whose 0 V reference does not match the S5 rack’s 24 V DC L+ / M layout—common in compact panels where the AO might drive a 0–10 V inverter speed reference (inverter 0 V floats relative to panel 24 V) or a 4–20 mA positioner powered from a separately derived 24 V DC loop supply. Resolution is 12-bit + sign (13-bit two’s complement), adequate for process-positioning and drive-speed commands where 0.025% of full-scale step size (±10 V → ~0.5 mV/LSB) meets spec. Siemens has placed the entire S5 470 family into PM490 end-of-life status with no designated S7 replacement, so the 6ES5470-8MB11​ today is purely an MRO/spare-stocking line item for plants running S5-90U/100U or ET 200U nodes that have not yet migrated to S7-1200/1500 or ET 200SP.In a typical S5-100U local panel—CPU 103U in slot 1, a 32-point DI in slot 2, a 6ES5452-8MR11​ 4-relay DO in slot 3, and the 6ES5470-8MB11​ in slot 4 feeding 8 × 0–10 V speed references to micro-drives on a conveyor zone—the module’s compact footprint and floating outputs let the panel mix drive-vendor 0 V domains without interposing signal isolators. That’s the design intent: compact S5 panel + mixed-vendor analog actuators = 6ES5470-8MB11.

Technical Specifications