Yokogawa EXA PH202 2-Wire pH/ORP Analyzer - Manual (Page 33)

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