Yokogawa EXA PH202 2-Wire pH/ORP Analyzer User Manual

Page 33

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IM 12B07D02-01E

2-20 Specification

2-15. Control Drawing of PH202S FF/PB Specification (CSA).

Safe area

Hazardous area

Zone 0 or 1

Safe area

Apparatus

I.S.

interface

I.S.

certified

Terminator

PH202S-F

or PH202S-P

I.S.

certified

Terminator

-

+

-

+

Transmitter

Transmitter

Sensor

Connections

Ui = 24 V

or Ui = 17,5 V

Ii = 250 mA Ii = 380 mA

Pi = 1,2 W Pi = 5,32 W

CSA Ex ia Class I, DIV. 1, Group ABCD

T4 for ambient temp. d 55 qC

-

+

-

+

x

Sensor(s) are a thermocouple, RTD's, passive resistive switch devices, or is CSA entity

approved and meet connection requirements.

x

Electrical data of the PH202S-F & PH202S-P:
-

Supply and output circuit:

Maximum input voltage Ui =24 V

Maximum input current Ii =250 mA

Maximum input power Pi =1.2 W

Effective internal capacitance Ci = 220 pF;

Effective internal inductance Li = 0 μH.

or

Maximum input voltage Ui =17.5 V

Maximum input current Ii =380 mA

Maximum input power Pi =5.32 W

Effective internal capacitance Ci = 220 pF;

Effective internal inductance Li = 0 μH.

-

Sensor input circuit:

Maximum output voltage Uo = 14.4 V; Maximum output current Io = 32.3 mA

Maximum allowed external capacitance Co = 600 nF

Maximum allowed external inductance Lo = 34 mH

x

Any CSA approved I.S. interface may be used that meets the following requirements:

Uo d 24 V

Io d 250 mA

Po d 1.2 W

Co t 220 pF + Ccable; Lo t 0 μH + Lcable

or

Uo d 17.5 V

Io x d 380 mA

Po d 5.32 W

Co t 220 pF + Ccable; Lo t 0 μH + Lcable

Installation should be in accordance with Canadian Electrical Code, Part I or CEC, Part I.

Maximum safe area voltage should not exceed 250 Vrms.

x

Electrical data of the PH202S-B & PH202S-D (non-incendive):

For Class I, Div.2, Group ABCD the CSA approved I.S. interface is not required, and the

sensor input circuit is non-incendive having the parameters:

Maximum output voltage Uo = 14.4 V; Maximum output current Io = 32.3 mA

Maximum allowed external capacitance Co = 3.5 μF

Maximum allowed external inductance Lo = 76 mH

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