NeSSI Sensor Actuator Connectivity Rick Ales Sep, 2001 1 9/9/2001 R.Ales

Proposed NeSSI Topology Analyzer Server & Workstation Level 2 Control Link NeSSI Link, Sensor/Actuator Bus, used to connect low-level, smart devices Control System RAMAN, NIR etc. GP Area Fiber-Optic Sensor. Level 1 Analyzer Link Field WH P A V T P A V T P A V T Level 0 NeSSI Link Wireless Link Modular Sampling System Initiative Pittcon: March 7, 2001 Presented by Rob Dubois of Dow Chemical at PittCon 2001 2 9/9/2001 R.Ales

NeSSI Link 0 Requirements P A V T Open System Industry Standard Proven Commercial Success Cheap (Low cost of ownership) Smart features. Robust Small 3 9/9/2001 R.Ales

* Technical Issues (not critical) Determinism Master/Slave * Engineering Concept (not critical) (typical application) (in some cases) (node-2-node < 10m) (Class 1 Div 1 & Div 2) Determinism Master/Slave Multi Master Distance Speed Hazardous Area 4 9/9/2001 R.Ales

OSI Communications Model 5 9/9/2001 R.Ales

Physical Layer Connectors Field wires Filter Isolation Class 1 Div 2 Nonincendive Class 1 Div 1 IEC 1158-2 6 9/9/2001 R.Ales

Data Link Layer Single Chip Solution Communication Controller CPU, RAM, Flash & EEPROM A/D, D/A, Discrete I/O Provides Compatibility 7 9/9/2001 R.Ales

Application Layer Software Download to Common Hardware Platform Could be Multi Vendor: DeviceNet SDS IEC 1131 Derivative Provides Interoperability 8 9/9/2001 R.Ales

NeSSI Sesnor Actuator Connectivity... ... Keep it Simple 9 9/9/2001 R.Ales