Stamp Company : Stamp Certification Institute :
Signature : Remarks :
Model EXA PH202S
Title : Installation Drawing PH202S CSA
Number : FF1-PH202S-00 Page : 3 of 10
Revision : 5.4
Safe area
Vmax = 31.5 VoltDC
Imax = 100 mA
Pmax = 1.2 Watt
CSA certified
Power Supply
(HART compatible) )
Output
Supply
SENSOR(S)
terminals 11-19
+
_
G
SENSOR(S)
terminals 11-19
Hazardous area
Safe area
+
_
G
Protective
earth
Protective
earth
Intrinsically safe design
(pH/ORP-transmitter)
EXA PH202S
+
_
Load
Resistance
Imax = 100 mA
Vmax = 31.5 VoltDC
Hazardous area
Protective
earth
+
_
24 volts DC Nominal
Supply Voltage.
Intrinsically safe design
CSA Ex ia Class1, Div.1, Group C&D, T3C for ambient temp. < 55¡C
(pH/ORP-transmitter)
EXA PH202S
CSA certified
safety barrier or power supply
Suitable values are:
(HART compatible)
CSA Ex ia Class1, Div.1, Group C&D, T3C for ambient temp. < 55¡C
For electrical data:
see text below.
For electrical data:
see text below.
Suitable values are:
• Sensor(s) are thermocouples, RTD s, passive resistive switch devices, or are CSA entity approved and meet
connection requirements.
• Electrical data of the EXA PH202S.
- Supply and output circuit (terminals + and -):
Maximum input voltage V
max
= 31.5 V.
Maximum input current I
max
= 100 mA.
Effective internal capacitance C
i
= 22 nF.
Effective internal inductance L
i
= 22 µH.
- Sensor input circuit (terminals 11 through 19):
Maximum output voltage V
oc
= 14.4 V.
Maximum output current I
sc
= 32.3 mA.
Maximum allowed external capacitance Ca = 600 nF.
Maximum allowed external inductance La = 36 mH.
• Barriers and power supply should be CSA certified. The specifications must not exceed the maximum values as
shown in the diagram above.
Installation should be in accordance with Canadian Electrical Code, Part I or CEC, Part I.
Maximum safe area voltage should not exceed 250 V
RMS
.
• The Hand Held Communicator must be of a CSA certified intrinsically safe type in case it is used on the
intrinsically safe circuit in the hazardous area.
YOKOGAWA EUROPE B.V.
Date : 01/07/2004
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