Siemens 6ES7131-4RD02-0AB0 ET 200S 4-Channel Digital Input Module | Replacement, Equivalent & Selection Guide
The Siemens 6ES7131-4RD02-0AB0 is a 4-channel 24 VDC digital input electronic module designed for the SIMATIC ET 200S distributed I/O system. It captures discrete on/off signals from field devices such as sensors, switches, and pushbuttons, and transmits them to the SIMATIC S7 controller via PROFIBUS DP or PROFINET. This page provides full technical specifications, compatible replacement models, application guidance, and a structured selection guide to help engineers and procurement teams make the right sourcing decision.
Technical Specifications
- Part Number: 6ES7131-4RD02-0AB0
- Product Family: SIMATIC ET 200S
- Module Type: Digital Electronic Module (4-channel DI)
- Input Voltage: 24 VDC
- Number of Inputs: 4 channels
- Input Current (per channel): Typ. 4 mA at 24 VDC
- Signal Delay: Configurable (0.1 ms / 0.5 ms / 3 ms / 15 ms)
- Isolation: Optocoupler isolation between field and backplane bus
- Degree of Protection: IP20
- Operating Temperature: 0 °C to +60 °C
- Storage Temperature: −40 °C to +70 °C
- Dimensions (W × H × D): 15 mm × 81 mm × 52 mm
- Weight: Approx. 80 g
- Supply Voltage: Via ET 200S power module (no separate 24 VDC supply required)
- Bus Interface: PROFIBUS DP / PROFINET (via IM 151 interface module)
- Certifications: CE, UL, cULus, ATEX (Zone 2)
Compatible Replacement & Equivalent Models
The following modules are functionally compatible or serve as direct/near-direct replacements for the 6ES7131-4RD02-0AB0. Always verify electrical and mechanical compatibility before substitution.
- 6ES7131-4BD01-0AB0 — ET 200S 2-channel DI 24 VDC (reduced channel count; suitable when only 2 inputs are needed)
- 6ES7131-4BF00-0AB0 — ET 200S 4-channel DI 24 VDC (earlier generation; verify firmware compatibility)
- 6ES7131-6BF00-0BA0 — ET 200SP 4-channel DI 24 VDC (next-generation platform; requires ET 200SP base unit)
- 6ES7131-6BH01-0BA0 — ET 200SP 8-channel DI 24 VDC (higher density; suitable for expansion projects)
- 6ES7321-1BH02-0AA0 — S7-300 SM 321 16-channel DI 24 VDC (rack-mounted alternative for S7-300 systems)
- Third-party equivalents: Wago 750-1405, Phoenix Contact IB IL 24 DI 4 (verify bus protocol and connector compatibility)
Note: Konmask.com recommends using original Siemens modules for safety-critical applications. Contact our team for cross-reference verification.
Why Choose the Original Model
- Guaranteed compatibility with all ET 200S interface modules (IM 151-1, IM 151-3 PN, IM 151-7 CPU)
- Configurable input delay (0.1 ms to 15 ms) for noise immunity in harsh industrial environments
- Compact 15 mm width maximizes cabinet density in space-constrained installations
- ATEX Zone 2 certification for use in potentially explosive atmospheres
- Proven reliability in automotive, food & beverage, and process industries worldwide
- Full STEP 7 / TIA Portal integration with hardware catalog support and diagnostic functions
Typical Applications
- Discrete signal acquisition from proximity sensors, limit switches, and pushbuttons
- Machine tool and conveyor line control panels
- Automotive body shop and assembly line automation
- Packaging and bottling line I/O expansion
- Building automation and HVAC control systems
- Distributed I/O nodes in large-scale process plants
System Compatibility
- Interface Modules: IM 151-1 Standard, IM 151-1 FO, IM 151-3 PN, IM 151-7 CPU
- Bus Systems: PROFIBUS DP (up to 12 Mbit/s), PROFINET IO
- Programming Software: SIMATIC STEP 7 V5.x, TIA Portal V13 and above
- Power Modules: PM-E 24 VDC (6ES7138-4CA01-0AA0) and compatible variants
- Terminal Modules: TM-E15S24-01 (6ES7193-4CA40-0AA0) — screw-type; TM-E15C24-01 — spring-type
Selection Guide
Use the criteria below to confirm the 6ES7131-4RD02-0AB0 is the right module for your application, or to identify a more suitable alternative:
- Channel count needed: 4 inputs → 6ES7131-4RD02-0AB0 ✓ | 2 inputs → 6ES7131-4BD01-0AB0 | 8 inputs → ET 200SP 6ES7131-6BH01-0BA0
- Platform: ET 200S system → this module ✓ | ET 200SP system → 6ES7131-6BF00-0BA0 series
- Input voltage: 24 VDC → this module ✓ | 120/230 VAC → consider SM 321 AC variants
- Environment: Standard (IP20) → this module ✓ | Explosive atmosphere Zone 2 → this module (ATEX certified) ✓
- Density priority: Standard → this module ✓ | High density → ET 200SP 8/16-channel DI modules
- Budget constraint: Refurbished/tested units available — contact Konmask.com for pricing
Quality Assurance & Sourcing
All Siemens modules supplied by Konmask.com are sourced through verified industrial supply channels. Each unit undergoes:
- Visual inspection for physical damage, label integrity, and firmware version verification
- Functional power-on test where applicable
- Anti-static packaging with humidity indicator cards
- Traceability documentation available on request
We supply new original, factory-sealed, and tested surplus units. Lead times and availability are confirmed at time of order. All products are covered by Konmask.com’s quality guarantee.
How to Order
- Part Number: 6ES7131-4RD02-0AB0
- Add to cart directly on this page, or contact us for bulk pricing and lead time confirmation
- Email: support@konmask.com
- Phone / WhatsApp: +0086 19859288691
- Response time: Within 1 business day (Mon–Fri, UTC+8)
- Request a formal quotation or proforma invoice by emailing your PO or BOM to support@konmask.com
Replacement & Compatibility FAQ
Q: Can I replace 6ES7131-4RD02-0AB0 with 6ES7131-6BF00-0BA0 (ET 200SP)?
A: Not directly. The ET 200SP uses a different base unit and terminal module system. A platform migration is required.
Q: Is this module compatible with PROFINET?
A: Yes, when used with an ET 200S PROFINET interface module (e.g., IM 151-3 PN).
Q: What is the difference between 6ES7131-4RD02-0AB0 and 6ES7131-4BF00-0AB0?
A: The -4RD02 variant supports configurable input delay and is the current production version. The -4BF00 is an earlier revision; both are 4-channel 24 VDC DI modules for ET 200S.
Q: Can I use third-party terminal modules with this electronic module?
A: Siemens ET 200S electronic modules require Siemens-compatible terminal modules (TM-E series). Third-party terminal modules are generally not interchangeable.
Q: Do you provide a certificate of conformity?
A: Yes, available on request for new original units.
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