SAM: hardware options

1
SAM hardware options

• Explained in the Gen II spec
• updated for clarity in May 05
• see Section 10.3
• see Figure 10

http//www.cpac.washington.edu/NeSSI/NeSSI_Gen_II_
Spec_6_21_04.pdf
2
Figure 10
Stand-alone SAM
Embedded SAM
3
Stand-alone SAM

• SAM has its own enclosure
• The NeSSI-bus provides intrinsically safe,
  bi-directional communication with sensors and
  actuators
• Heating for the substrate, enclosure or other
  devices is controlled by SAM
• SAM communicates to the DCS and operations and
  maintenance domains via Ethernet.

4
Embedded SAM

• The sensor or analyzer has its own controller and
  is directly connected to the controller, for
  example
• pH sensor connected with electrode cable
• spectrometer with a sample cell on the substrate
  connected by fiber optic cable
• GC with the sample delivered by NeSSI
• SAM is embedded into the analyzer controller
• The NeSSI-bus provides intrinsically safe,
  bi-directional communication with sensors and
  actuators
• Heating for the substrate, enclosure or other
  devices is controlled by SAM
• Analyzer controller communicates to the DCS and
  operations and maintenance domains via Ethernet.

5
Legacy connectivity
6
A way forward to develop SAM?

• Start off with embedded systems in GCs
• hardware (computing power) already there
• networking to DCS/maint. domains already there
• control of sample systems already part of design
• Opportunity to develop and test functionality in
  fastest time and at lowest cost
• Starts out with a natural deployment mechanism
• Follow on by deploying the software into a
  stand-alone package
• what ready made devices are already available?