Stamp Company : Stamp Certification Institute :
Signature : Remarks :
Model EXA PH202S
Title : Control Drawing PH202S Cenelec
Number : FF1-PH202S-00 Page : 1 of 10
Revision : 5.4
EXA PH202S
(pH/ORP-transmitter)
Safe area
Uo = 31.5 Volt DC
Io = 100 mA
Po = 1.2 Watt
EEX ib Certified Repeater
Power Supply
(HART Compatible)
Output
Supply
SENSOR(S)
terminals 11-19
+
_
G
SENSOR(S)
terminals 11-19
Zone 0 or 1 Zone 1
Hazardous area
Safe area
+
_
G
Protective
earth
Protective
earth
Intrinsically safe design
CENELEC standard EEX ib [ia] IIC: T4 for ambient temp. < 55¡C
T6 for ambient temp. < 40¡C
Certificate nr. 00ATEX1068 X
EXA PH202S
+
_
Load
Resistance
EEX ib
Certified safety barrier or power
with Rint=300
Ω
Io = 100 mA
Uo = 31.5 Volt DC
Zone 0 or 1
Zone 1
Hazardous area
Protective
earth
+
_
24 volts DC Nominal
Supply Voltage.
Intrinsically safe design
CENELEC standard EEX ib [ia] IIC: T4 for ambient temp. < 55¡C
T6 for ambient temp.< 40¡C
Certificate nr. 00ATEX1068 X
(HART compatible)
(pH/ORP-transmitter)
• Sensor(s) are of a passive type to be regarded as simple apparatus , devices which comply with clause 1.3 of the
EN 50014.
• Electrical data of the EXAPH202S.
- Supply and output circuit (terminals + and -):
Maximum input voltage U
i
= 31.5 V.
Maximum input current I
i
= 100 mA.
Maximum input power P
i
= 1.2 W.
Effective internal capacitance C
i
= 22 nF.
Effective internal inductance L
i
= 22 µH.
- Sensor input circuit (terminals 11 through 19):
Maximum output voltage U
o
= 14.4 V.
Maximum output current I
o
= 32.3 mA.
Maximum allowed external capacitance C
o
= 600 nF.
Maximum allowed external inductance L
o
= 36 mH.
• Barriers and power supply specification must not exceed the maximum values as shown in the diagram above.
These safety descriptions cover most of the commonly used industry standard barriers, isolators and power
supplies.
• The Hand Held Communicator must be of a ATEX certified intrinsically safe type in case it is used on the
intrinsically safe circuit in the hazardous area or of a ATEX certified non-incendive type in case it is used in the
non-incendive circuit in the hazardous area.
YOKOGAWA EUROPE B.V.
Date : 01/07/2004
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