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1=FIOP collect hardwired signal
2=Data concentrator combines hard wire signal to determine flow of chem to the POU, or the distribution system status
(Tool interface signals:
chem dd, tool ready, tool fault)
3= SCADA MS provides overview of distribution and CDM status
Tool(POU)
1
Digital Imput (LAN)
2
1
3
FIOP
CVB
DC
CCS SCADA
Dist safety signals:
leak, cover
3
1
CDM
CDM status signals:
Chem ready, leak, cover
(FIOP, redundant DC, controlNet and Ethernet communication Networks, PDP, Room EMO controller.)
Interconnects:
CDMs-Tools-CVBs-LSS
4 Interconnections
Emergency exhaust vent shutdown is not connected into any of our panels
Life Safety Sys Interface
Valves Boxes
CDM interface:
Tool interface
Contact between Tool and FIOP
BCDS-CS
CVB
LSS
BCDS_CS
Signals:
BCDS-CS
Tool(POU)
FIOP
Aqueous:
Solvents:
Leak Switch: same as Aqueous
Air Pressure switch: same as Aqueous
CDM
FIOP
Tool output relay:
5 signals:
Leak float Switch: is held to the close position by a magnetic float. when the sump is filled the float rises and the switch goes to an open state. this also causes the 24v input signal to be lost and a alarm is generated. LSS is notified .
Cover signal:While door is closed, it holds the cover switches in the shut position to provide a fail-safe interlock. when the door is opened the switch will also open and generate an alarm. LSS is notified.
CSS switch and lamp: is a manual switch, held in the close position. when operator pushes the button the switch opens causing an alarm to the BCDS-CS, to LSS and also energizes the red lamp on the CVB.
CSS reset and lamp(for aqueous): when CSS is reset with the key switch the red lamp goes away.
Valve Box Maintenance Bypass and Lamp: normally closed by normal air pressure. when the key is engaged and CSS have been bypassed the yellow lamp will be lit.
Air pressure signal: the air pressure switch monitor the air pressure to the AOV. when pressure <=a 50 psi we get alarm.
Air Operated Valves: normally closes state , it uses air to open and a spring to shut . the AOV control air come from the valve box electrical section thru the pilot solenoid valves(actuated by outputs from the FIOP).
EMO
FIOP relay output :
FIOP output relay:
CDM relay output:
CSS
Not all tools utilize the chem ready signal in D1D
CDM
Chem ready
Solvent CVB
Aqueous CVB
FIOP
Chem dd
Does CVBs have a low air pressure alarm?
low air pressure
cover(will close supply and local AOV)
Leak
Tool
maintenance by pass
leak alarm(will close supply and local AOV)
CSS push button (will close supply and local AOV)
JVB
tool ready inactive close supply AOV
CSS reset button
leak alarm(will close supply and local AOV)
chem ready
chem demand
maintenance bypass light
CSS light
tool
chem ready
tool
PLC
chem dd