Siemens 6ES7138-4CA00-0AA0 — Analog Signal Board | ET 200S Distributed I/O Platform
Engineering Background
The Siemens ET 200S distributed I/O system is a cornerstone of SIMATIC automation architecture, deployed globally in process-critical and discrete manufacturing environments. Designed for modular scalability, ET 200S allows engineers to build compact, high-density I/O stations directly at the machine level, reducing wiring complexity and improving signal integrity.
Product Positioning
The 6ES7138-4CA00-0AA0 is a 2-channel analog input / 2-channel analog output electronic module for the ET 200S platform. It is engineered for applications requiring precise analog measurement and control within a PROFIBUS DP or PROFINET distributed I/O node. This module is the preferred choice for procurement engineers sourcing compact analog I/O for SIMATIC S7-300/S7-400 and ET 200S-based control systems.
Complete Technical Specifications
| Part Number / SKU | 6ES7138-4CA00-0AA0 |
| Brand | Siemens |
| Product Family | SIMATIC ET 200S |
| Module Type | Electronic Module — Analog Signal Board |
| Analog Inputs | 2 × AI (voltage/current selectable) |
| Analog Outputs | 2 × AO (voltage/current selectable) |
| Input Signal Range | ±10 V / 0–20 mA / 4–20 mA |
| Output Signal Range | ±10 V / 0–20 mA / 4–20 mA |
| Resolution | 12-bit (+ sign bit) |
| Supply Voltage | 24 V DC (via ET 200S power module) |
| Current Consumption | ≤ 60 mA at 5 V DC (backplane bus) |
| Isolation | Electrically isolated channels |
| Dimensions (W×H×D) | 15 mm × 81 mm × 52 mm |
| Weight | Approx. 200 g |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | −40 °C to +70 °C |
| Degree of Protection | IP20 |
| Certifications | CE, UL, cULus, ATEX (Zone 2) |
| Compatible Interface Module | IM 151-1 / IM 151-3 PN / IM 151-7 CPU |
| Communication Bus | PROFIBUS DP / PROFINET (via IM) |
| Country of Origin | Germany |
Proven Application Environments
- Process automation: Temperature, pressure, and flow measurement loops in chemical and pharmaceutical plants
- Machine tool control: Servo drive reference signals and spindle speed feedback in CNC machining centers
- Building automation: HVAC damper control and sensor integration in intelligent building management systems
- Water & wastewater: Level transmitter input and pump speed output in distributed pump stations
- Automotive assembly: Torque feedback and weld current monitoring in body-in-white production lines
- Energy management: Power quality monitoring and load control in substation automation panels
Engineering Advantages
- Ultra-compact form factor: 15 mm width enables high-density I/O packing within ET 200S stations, minimizing panel footprint
- Flexible signal configuration: Each channel independently configurable for voltage or current mode via parameter assignment in STEP 7 / TIA Portal
- Hot-swap capability: Module can be replaced under power without shutting down the entire I/O station, maximizing plant uptime
- Integrated diagnostics: Wire-break detection, overflow/underflow alarms, and short-circuit protection reported directly to the CPU
- Galvanic isolation: Protects the backplane bus and CPU from field-side transients and ground loops
- TIA Portal & STEP 7 compatible: Full GSD/GSDML support for seamless integration into existing SIMATIC engineering workflows
System Architecture & Signal Flow
The 6ES7138-4CA00-0AA0 plugs directly into an ET 200S terminal module (e.g., TM-E15S24-A1), which provides the field wiring connection. The electronic module interfaces with the ET 200S backplane bus, communicating with the interface module (IM 151 series) via the internal P-bus. The IM then transmits process data to the SIMATIC CPU over PROFIBUS DP or PROFINET.
Signal flow (input path): Field sensor → Terminal Module screw terminals → Electronic Module ADC → P-bus → Interface Module → PROFIBUS/PROFINET → SIMATIC CPU
Signal flow (output path): SIMATIC CPU → PROFIBUS/PROFINET → Interface Module → P-bus → Electronic Module DAC → Terminal Module screw terminals → Field actuator
Sourcing & Quality Verification
- All units sourced through authorized industrial distribution channels or verified surplus with full traceability documentation
- Pre-shipment inspection: visual examination, label authenticity check, and functional power-on test where applicable
- Original Siemens packaging and holographic labels verified prior to dispatch
- Batch and date codes documented and available upon request for quality records
- 12-month warranty against manufacturing defects; DOA replacement within 7 business days
Procurement Process
- Confirm part number: Verify 6ES7138-4CA00-0AA0 against your BOM or STEP 7 hardware configuration
- Request quote: Contact support@konmask.com for volume pricing, lead time, and availability confirmation
- Place order: Purchase directly via this product page or submit a PO to our sales team
- Shipping: DHL Express / FedEx International Priority — typical transit 3–7 business days worldwide
- Documentation: Commercial invoice, packing list, and certificate of conformity provided with every shipment
Technical FAQ
Q: Is the 6ES7138-4CA00-0AA0 compatible with S7-1500 systems?
A: This module is designed for the ET 200S platform and interfaces with S7-300/S7-400 CPUs via PROFIBUS DP, or with any PROFINET-capable CPU via the IM 151-3 PN interface module. It is not directly compatible with S7-1500 ET 200SP hardware.
Q: Can I mix AI and AO channels on the same module?
A: Yes. The 6ES7138-4CA00-0AA0 provides 2 independent AI channels and 2 independent AO channels on a single module, each configurable separately in STEP 7 or TIA Portal.
Q: What terminal module is required?
A: This electronic module requires a compatible ET 200S terminal module such as the TM-E15S24-A1 (6ES7193-4CA40-0AA0) for standard applications. Confirm terminal module compatibility with your station configuration.
Q: Is hot-swap supported without CPU stop?
A: Yes, ET 200S electronic modules support hot-swap replacement while the station remains powered, provided the interface module and CPU are configured for this mode.
Q: Do you provide STEP 7 GSD files or TIA Portal device descriptions?
A: GSD/GSDML files are available from the official Siemens Industry Online Support portal. Contact us if you need assistance locating the correct file for your firmware version.
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