Yokogawa digitalYEWFLO (DY) - Manual (Page 162)

<14. EXPLOSION PROTECTED TYPE INSTRUMENT>
14-11
IM 01F06A00-01EN
(5) Installation Diagram Intrinsically Safe
(and Note)
Intrinsically safe
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[Remote type]
DYA (converter)
SUPPLY
PULSE
A
B
T (*1)
C
A
B
T
DY (flowmeter)
SUPPLY
PULSE
Safety barriers
Safety barriers
[Integral type]
DY-N (flowmeter)
Hazardous Location
Group IIC, Zone 0
Class I, II, III, Division 1,
Groups A, B, C, D, E, F and G
Non Hazardous
Location
DYC: Signal cable
(*1) Wire for T terminal
With temperature sensor type : installed
Without temperature sensor type: not installed
F1408.ai
Electrical parameters of vortex flowmeter (DY) and vortex flow
converter (DYA).
Ui (Vmax)=30 V Ii (Imax)=165 mA Pi (Pmax)=0.9W
Ci=12 nF
Li=0.15 mH
Installation requirements between flowmeter, converter and
Safety Barrier
Uo ” Ui Io ” Ii Po ” Pi Co • Ci+Ccable
Lo • Li+Lcable
Voc ” Vmax Isc • Imax Ca • Ci+Ccable
La • Li+Lcable
Uo, Io, Po, Co, Lo, Voc, Isc, Ca and La are parameters of
barrier.
WARNING
• In any safety barrier used output current
must be limited by a resistor ‘R’ such that
Io=Uo/R or Isc=Voc/R.
• The safety barrier must be CSA certifi ed.
• Input voltage of the safety barrier must be
less than 250Vrms/Vdc.
• Installation should be in accordance with
Canadian Electrical Code Part I.
• Dust-tight conduit seal must be used when
installed in class II and III environments.
• Do not alter drawing without authorization
from CSA.
Type “n” and Non-incendive
Hazardous Location Non Hazardous
Location
Class IIC, Zone 2,
Class I, II,
Division 2,Groups A, B, C, D,
E, F and G,
Class III, Division 1
[Integral type]
[Remote type]
DY (flowmeter)
SUPPLY
PULSE
+ +
–
+
–
+
–
+
–
+
–
Power
Supply
Receiver
DY (converter) DY-N (flowmeter)
SUPPLY
PULSE
+ +
–
+
–
+
–
+
–
+
–
Power
Supply
Receiver
A
B
T
C
A
B
T (*1)
DYC: Signal cable
(*1) Wire for T terminal
With temperature sensor type : installed
Without temperature sensor type: not installed
Non-incendive field wire parameters of vortex flowmeter (DY)
and vortex flow converter (DYA).
Ui (Vmax)=30 Ii (Imax)=165mA Pi (Pmax)=0.9W
Ci=12nF
Li=0.15mH
Installation requirement between flowmeter, converter and
general purpose equirement.
Uo ” Ui Io ” Ii Po ” Pi Co • Ci+Ccable
Lo • Li+Lcable
Voc ” Vmax Isc ” Imax Ca • Ci+Ccable
La • Li+Lcable
Uo, Io, Po, Co Voc, Isc, Ca and La are nonincendive field
wire parameters of general purpose equipment.
F1409.ai
General Purpose
Equipment
WARNING
• The general purpose equipment must
be CSA certifi ed as the equipment which
have type n or non-incendive fi eld wire
parameters.
• Installation should be in accordance with
Canadian Electrical Code Part I.
• Dust-tight conduit seal must be used when
installed in class II and III environments.
• Do not alter drawing without authorization
from CSA.
(6) Dual Seal (Option code: /CF11, /CS11)
Dual Seal:
Certifi ed by CSA to the requirement of ANSI/ISA
12.27.01
No additional sealing required.
Primary seal failure annunciation: at the O-ring seal
portion between shedder bar and amplifi er housing.