Installation Diagram; Data Plate - YOKOGAWA DY025 User Manual

10.3.5 Installation Diagram

Intrinsically Safe
[Integral type]
Hazardous Location
(Zone 0)
DY (flowmeter)
[Remote type]
Hazardous Location
(Zone 0)
DY-N (flowmeter) DYA (converter)
A A
B B
T T (*1)
C
DYC: Signal cable
(*1) Wire for T terminal
With temperature sensor type
Without temperature sensor type: not installed
Electrical parameters:
Ui=30V Ii=165mA
Ci=37nF Li=0mH
Installation Requirements between Flowmeter, Converter and
Safety Barrieres:
Uo Ui Io Ii Po Pi Co
Lo Li Lcable
Uo, Io, Co, and Lo are parameters of safety barrier.
Ccable and Lcable are the maximum allowable cable
parameters.
WARNING
• The safety barrier must be SAA certified.
• Input voltage of the safety barrier must be less
than 250Vrms/Vdc.
• In any safety barriers used the output current
must be limited by a resistor 'R' such that
Io=Uo/R.
Non Hazardous
Location
Safety barriers
SUPPLY
PULSE
Non Hazardous
Location
Safety barriers
SUPPLY
PULSE
: installed
Pi=0.9W
Ci Ccable
F100301_1.EPS
10. EXPLOSION PROTECTED TYPE INSTRUMENT
Type "n"
[Integral type]
Hazardous Location
(Zone 2)
[Remote type]
Hazardous Location
(Zone 2)
DY-N (flowmeter)
A
B
T
DYC: Signal cable
(*1) Wire for T terminal
With temperature sensor type
Without temperature sensor type: not installed
WARNING
Output voltage of power supply must not exceed
30Vdc and will void the certification.

10.3.6 Data Plate

Intrinsically safe and Type "n"
WARNING
• The specifications of Intrinsically safe type and
Type n are described (engraved) on these data
plates. For use of SAA, select a specification
either Intrinsically safe type (Ex ia) or Type n
(Ex n), then erase unnecessary specification
at the customer side.
Once a specification has been selected, never
it can be changed again. (ex. Never use the
flowmeter as Type n if it has selected Intrinsi-
cally safe type firstly.)
10-8
Non Hazardous
Location
General Purpose
DY (flowmeter)
SUPPLY
PULSE
Non Hazardous
Location
General Purpose
DYA (converter)
A
SUPPLY
B
T (*1)
PULSE
C
: installed
IM 01F06A00-01E
Equipment
Power
Supply
Receiver
Equipment
Power
Supply
Receiver
F100301_2.EPS