Siemens 6ES7288-3AM06-0AA0 – Analog I/O Expansion Module | SIMATIC S7-200 SMART
Engineering Background
The SIMATIC S7-200 SMART platform is Siemens’ purpose-built compact PLC series for cost-sensitive yet performance-demanding automation applications across Asia-Pacific and global OEM markets. The 6ES7288-3AM06-0AA0 (AM06) is the analog mixed I/O expansion module in this family, delivering 2 analog inputs and 1 analog output in a single compact housing — enabling precise process variable monitoring and closed-loop control without requiring a dedicated output module.
Product Positioning
Designed for procurement engineers and system integrators who need a verified, drop-in analog expansion for S7-200 SMART CPUs. The AM06 is the preferred choice when both measurement and actuation are required in a single slot, reducing panel footprint and BOM cost. Konmask.com supplies this module as genuine OEM hardware with full traceability documentation available on request.
Complete Technical Specifications
| Part Number | 6ES7288-3AM06-0AA0 |
| Series / Platform | SIMATIC S7-200 SMART |
| Module Type | Analog Expansion Module (Mixed I/O) |
| Analog Inputs | 2 channels (AI) |
| Analog Outputs | 1 channel (AO) |
| Input Signal Range | ±10 V DC / 0–20 mA / 4–20 mA (software selectable) |
| Output Signal Range | ±10 V DC / 0–20 mA |
| Resolution (Input) | 12-bit |
| Resolution (Output) | 12-bit |
| Supply Voltage | 24 V DC (via CPU expansion bus) |
| Current Consumption | ≤ 80 mA (from 5 V bus) |
| Isolation | Optically isolated I/O from logic |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | −40 °C to +70 °C |
| Relative Humidity | 5% to 95% (non-condensing) |
| Protection Rating | IP20 |
| Dimensions (W × H × D) | 45 mm × 100 mm × 81 mm |
| Weight | Approx. 200 g |
| Mounting | DIN rail (35 mm) or panel mount |
| Certifications | CE, UL, cULus, RCM |
| Compatible CPUs | S7-200 SMART CPU SR20 / SR30 / SR40 / SR60 / ST20 / ST30 / ST40 / ST60 |
| Max Expansion Modules | Up to 6 expansion modules per CPU |
| MLFB / Order Number | 6ES7288-3AM06-0AA0 |
Proven Application Environments
- Temperature Control Loops – PID regulation of furnaces, ovens, and HVAC systems using thermocouple/RTD transmitter signals (4–20 mA) on AI channels and proportional valve control on AO
- Pressure & Flow Monitoring – Continuous acquisition of pressure transmitter and flow meter signals in water treatment, chemical dosing, and compressed-air systems
- Variable Speed Drive (VFD) Reference – Analog output (0–10 V or 4–20 mA) used as speed reference signal to frequency inverters in conveyor and pump applications
- Level Control – Ultrasonic or hydrostatic level sensor integration for tank management in food & beverage and pharmaceutical processes
- OEM Machine Building – Compact panel integration where mixed analog I/O is required without the cost of separate AI and AO modules
Engineering Advantages
- Mixed I/O in One Slot – Combines 2 AI + 1 AO in a single 45 mm-wide module, saving panel space and reducing wiring complexity versus separate modules
- 12-Bit Resolution – Provides 4,096 discrete steps across the full signal range, sufficient for most industrial process control applications
- Software-Selectable Signal Ranges – No hardware jumpers required; signal type and range configured directly in STEP 7-Micro/WIN SMART software
- Plug-and-Play Expansion – Direct side-bus connection to S7-200 SMART CPU; no additional power supply or communication wiring needed
- Optical Isolation – Protects CPU logic from field-side noise and ground loops common in industrial environments
- Wide Temperature Range – Rated 0–55 °C for reliable operation in non-air-conditioned control cabinets
System Architecture & Signal Flow
The AM06 connects directly to the right side of the S7-200 SMART CPU via the integrated expansion bus connector. Signal flow is as follows:
- Field Sensors → AI Channels (CH0, CH1): Analog transmitters (4–20 mA or ±10 V) wire to the screw-terminal AI inputs. The 12-bit ADC samples each channel and places the converted integer value into the CPU’s analog input image register (AIW area).
- CPU Program → AO Channel (CH0): The STEP 7-Micro/WIN SMART program writes a 12-bit integer to the analog output image register (AQW area). The DAC converts this to the configured voltage or current signal for field actuators (valves, drives, positioners).
- Bus Power: The module draws 5 V logic power from the CPU expansion bus; field-side 24 V DC is supplied via the module’s dedicated power terminals.
Maximum recommended cable length for analog signals: 100 m (shielded twisted pair). Shield must be grounded at one end only to prevent ground loops.
Sourcing & Quality Verification
- Origin: Genuine Siemens OEM hardware — not aftermarket or clone
- Traceability: Each unit ships with original Siemens packaging and label; batch/date codes available on request
- Inspection: Pre-shipment functional verification available; units tested for correct analog I/O response before dispatch
- Documentation: Siemens datasheet, EU Declaration of Conformity, and calibration records available upon request
- Warranty: 12-month warranty against manufacturing defects; DOA replacement within 7 days of receipt
Procurement Process
- Confirm Compatibility – Verify your CPU model (SR/ST series) and available expansion slots (max 6 modules per CPU)
- Request Quote – Contact support@konmask.com with quantity, required delivery date, and destination port
- Order Confirmation – Pro-forma invoice issued within 24 hours; payment via T/T, PayPal, or trade assurance
- Shipment – DHL / FedEx express (3–7 business days) or sea freight for bulk orders; tracking number provided
- Incoming Inspection – Recommend verifying part number label, packaging seal, and performing a bench power-on test before installation
Technical FAQ
Q: Can the AM06 be used with S7-200 (classic) CPUs?
A: No. The 6ES7288-3AM06-0AA0 is exclusively compatible with the S7-200 SMART series. It uses a different expansion bus connector and is not interchangeable with legacy S7-200 modules (6ES72xx-0xx).
Q: How many AM06 modules can I connect to one CPU?
A: Up to 6 expansion modules total per CPU. The number of analog modules is limited by the CPU’s total expansion bus current budget (typically 1,000 mA at 5 V DC).
Q: What is the conversion time per analog channel?
A: Approximately 625 µs per channel. With 2 AI channels, total scan contribution is ~1.25 ms — negligible for most process control applications.
Q: Can I use 0–10 V sensors on the AI inputs?
A: Yes. The ±10 V range covers 0–10 V unipolar signals. Configure the input range in STEP 7-Micro/WIN SMART and apply appropriate scaling in your ladder program.
Q: Is shielded cable mandatory?
A: Siemens strongly recommends shielded twisted-pair cable for all analog wiring to minimize EMI-induced noise, especially in environments with VFDs or high-current switching equipment.
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