TIDA-010049
TUV-assessed digital input reference design for IEC 61508 (SIL-2)
TIDA-010049
Overview
This 8-channel, group-isolated, digital input module reference design, focuses on applications with the need for industrial functional safety. This design has diagnostics implemented to help detect both permanent and transient random hardware faults. The concept of this input module has been assessed by TUEV SUED (TÜV SÜD) and helps designers meet system compliances of IEC61508-2:2010 (SIL2) and EN13849-1:2015 (Cat2 PLd). Additionally, this design has a hardware fault tolerance (HFT) of 0 (1oo1D architecture) and digital inputs designed to comply with IEC61131-2 (type 1) recommendations.
Features
- Group-isolated 8-channel digital input compliant to IEC61131-2 (type 1)
- Concept meets requirements of IEC61508-2:2010 (SIL2) and EN13849-1:2015 (Cat2 PLd) (assessed by TÜV SÜD)
- Diagnostics and monitoring features
- Miswiring protection (reverse polarity, digital input short/open/cross-wire)
- Small footprint
Industrial
- AC drive control module
- AC input HVAC motor control
- Digital Input Module IEC61131-2
- Flight control unit
- Full authority digital engine control (FADEC)
- Industrial robot digital I/O module
- Linear motor segment controller
- Railway electric propulsion system
- Servo drive control module
- Train control & management systems
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDUEN7.PDF (1715 K)
Reference design overview and verified performance test data
TIDRZU0.PDF (769 K)
Detailed schematic diagram for design layout and components
TIDRZU1.PDF (49 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRZU2.PDF (510 K)
Detailed overview of design layout for component placement
TIDCFI0.ZIP (589 K)
Design file that contains information on physical board layer of design PCB
TIDRZU3.PDF (2566 K)
PCB layer plot file used for generating PCB design layout
TIDRZU4.ZIP (2441 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
AND gates
SN74LVC1G11 — 1-ch, 3-input 1.65-V to 5.5-V 32 mA drive strength AND gate
Data sheet: PDF | HTMLMOSFETs
CSD18541F5 — 60-V, N channel NexFET™ power MOSFET, single LGA 1.5 mm x 0.8mm, 65 mOhm, gate ESD protection
Data sheet: PDF | HTMLNAND gates
SN74LVC2G132 — 2-ch, 2-input, 1.65-V to 5.5-V NAND gates with Schmitt-Trigger inputs
Data sheet: PDFNoninverting buffers & drivers
SN74LVC1G125 — Single 1.65-V to 5.5-V buffer with 3-state outputs
Data sheet: PDF | HTMLStart development
Technical documentation
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| Type | Title | Date | ||
|---|---|---|---|---|
| * | User guide | TIDA-010049 TUEV Concept Report | Jun. 07, 2019 | |
| * | Design guide | TUV-Assessed Digital Input Reference Design for IEC 61508 (SIL-2) | Jun. 05, 2019 |
Related design resources
Hardware development
DEBUG PROBE
Software development
Reference designs
REFERENCE DESIGN
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