SIEMENS 6ES7288-3AE08-0AA0 — 8AI/4AQ Analog I/O Module | S7-200 SMART Platform
Engineering Background
The SIEMENS S7-200 SMART series represents Siemens’ optimized compact PLC platform for cost-sensitive yet performance-demanding automation applications across Asia-Pacific and emerging markets. Designed as the successor to the S7-200 Classic, the SMART platform delivers enhanced processing speed, Ethernet-native communication, and an expanded analog I/O ecosystem — making it the preferred controller for OEM machine builders, panel integrators, and process automation engineers.
Product Positioning
The 6ES7288-3AE08-0AA0 (EM AE08) is a dedicated analog expansion module providing 8 differential analog inputs and 4 analog outputs in a single compact housing. It is purpose-engineered for applications requiring simultaneous multi-channel process variable acquisition and analog setpoint output — including PID loop control, drive speed reference, valve positioning, and sensor signal conditioning — without consuming additional cabinet space or CPU processing overhead.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 6ES7288-3AE08-0AA0 |
| Module Designation | EM AE08 |
| Compatible Platform | SIEMENS S7-200 SMART CPU (all variants) |
| Analog Inputs | 8 channels, differential |
| Analog Outputs | 4 channels |
| Input Voltage Range | ±10 V DC (unipolar / bipolar selectable) |
| Input Current Range | 0–20 mA / 4–20 mA |
| Output Voltage Range | ±10 V DC |
| Output Current Range | 0–20 mA |
| Resolution (Input) | 12-bit (0–27648 / ±27648 engineering units) |
| Resolution (Output) | 12-bit |
| Conversion Time (per channel) | ≤ 625 µs |
| Isolation | 500 V AC (field-to-logic) |
| Supply Voltage | 24 V DC (via CPU expansion bus) |
| Current Consumption (5 V bus) | 80 mA max |
| Current Consumption (24 V) | 30 mA max (no load) |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | −40 °C to +70 °C |
| Relative Humidity | 5–95% RH (non-condensing) |
| Protection Rating | IP20 |
| Dimensions (W × H × D) | 45 mm × 100 mm × 81 mm |
| Weight | Approx. 200 g |
| Mounting | DIN rail (EN 60715 TH35) |
| Certifications | CE, UL, cULus, RCM |
| MLFB / Order Number | 6ES7288-3AE08-0AA0 |
Proven Application Environments
- Process Control: Multi-loop PID temperature, pressure, and flow regulation in chemical, pharmaceutical, and food processing plants
- Drive Systems: Analog speed reference (0–10 V / 4–20 mA) output to VFDs and servo amplifiers for coordinated motion control
- HVAC Automation: Chiller plant control, AHU damper positioning, and VAV box regulation with simultaneous sensor feedback acquisition
- Water & Wastewater: Pump station level monitoring, dosing pump control, and effluent quality measurement
- OEM Machinery: Injection molding, packaging lines, and textile machinery requiring high-channel-count analog I/O in compact panel footprints
- Energy Management: Power quality monitoring, transformer load balancing, and renewable energy interface (solar inverter, wind turbine)
Engineering Advantages
- High Channel Density: 8AI + 4AQ in a single 45 mm wide module — reduces panel width and wiring complexity versus discrete I/O cards
- Differential Input Architecture: Rejects common-mode noise from long cable runs and industrial EMI environments without external signal conditioners
- Fast Conversion Cycle: ≤ 625 µs per channel enables real-time closed-loop control without introducing scan-time latency
- Plug-and-Play Expansion: Direct side-bus connection to all S7-200 SMART CPUs — no additional power supply or communication wiring required
- STEP 7-Micro/WIN SMART Integration: Auto-detected by the IDE; I/O addresses assigned automatically in the system block
- Wide Signal Compatibility: Supports voltage (±10 V) and current (0–20 mA / 4–20 mA) inputs on the same module via software configuration — eliminates the need for separate voltage and current modules
System Architecture & Signal Flow
The 6ES7288-3AE08-0AA0 connects directly to the S7-200 SMART CPU via the integrated expansion bus connector on the right side of the CPU housing. The module is powered entirely from the CPU’s 5 V logic bus and the 24 V DC sensor supply. Field wiring connects to the removable screw-terminal block (0.5–1.5 mm² conductors). Analog input signals are routed through an internal multiplexer to a shared 12-bit ADC, with each channel sampled sequentially at ≤ 625 µs intervals. Output channels use independent 12-bit DACs with short-circuit protection on voltage outputs and open-wire detection on current outputs. All analog channels are galvanically isolated from the logic bus at 500 V AC.
Recommended wiring practice: Use shielded twisted-pair cable (Belden 8761 or equivalent), ground shield at one end only (control panel earth), and maintain minimum 100 mm separation from power cables.
Sourcing & Quality Verification
- Origin: Genuine SIEMENS OEM product — sourced through authorized distribution channels and verified supplier networks
- Authenticity Checks: Each unit inspected for Siemens holographic label, laser-etched part number, and factory date code consistency
- Condition: New-in-box (NIB) with original Siemens anti-static packaging; factory seal intact
- Traceability: Batch records and supplier documentation available upon request for regulated industries
- Warranty: 12-month Konmask quality guarantee covering manufacturing defects and DOA units
Procurement Process
- Confirm Compatibility: Verify your S7-200 SMART CPU firmware version (V2.0+ recommended) and available expansion slot count (max 6 modules per CPU)
- Place Order: Add to cart or contact support@konmask.com for volume pricing and lead time confirmation
- Lead Time: In-stock orders ship within 1–3 business days; EXW Xiamen / FOB Xiamen available for international buyers
- Documentation: Commercial invoice, packing list, and certificate of origin provided; Form E (ASEAN) available on request
- Payment: T/T, PayPal, credit card, and Alibaba Trade Assurance accepted
Technical FAQ
Q: Can I mix voltage and current inputs on the same module?
A: Yes. Each input channel is individually configurable for voltage (±10 V) or current (0–20 mA / 4–20 mA) via the STEP 7-Micro/WIN SMART system block — no hardware jumpers required.
Q: How many EM AE08 modules can I connect to one CPU?
A: Up to 6 expansion modules total per S7-200 SMART CPU, subject to the CPU’s 5 V bus current budget. Verify total current draw does not exceed the CPU’s expansion bus rating (typically 1,000 mA for ST/SR/CR series).
Q: Is the 6ES7288-3AE08-0AA0 compatible with S7-200 Classic CPUs?
A: No. This module is exclusively designed for the S7-200 SMART platform. It is not electrically or mechanically compatible with S7-200 Classic expansion modules.
Q: What is the difference between 6ES7288-3AE08-0AA0 and 6ES7288-3AQ02-0AA0?
A: The AE08 provides 8 analog inputs + 4 analog outputs. The AQ02 provides 2 analog outputs only. Select AE08 when simultaneous multi-channel input acquisition is required.
Q: Can the analog outputs drive 4–20 mA loops directly?
A: Yes. The current output channels support 0–20 mA (which includes the 4–20 mA NAMUR range). Maximum load resistance for current output is 500 Ω.
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