Yokogawa EXA PH202 2-Wire pH/ORP Analyzer - Manual (Page 25)

IM 12B07D02-01E
2-12 Specification
2-9. Control Drawing of PH202S FF/PB Specification (IECEx)
Safe area
Hazardous area
Zone 0 or 1
Safe area
Apparatus
I.S.
interface
I.S.
certified
Terminator
Ui = 24 V or Ui = 17,5 V
Ii = 250 mA Ii = 380 mA
Pi = 1,2 W Pi = 5,32 W
Ex ia IIC
T4 for ambient temp. d 55 qC
PH202S-F
or PH202S-P
I.S.
certified
Terminator
-
+
- +
Transmitter Transmitter
Sensor
Connections
- + - +
x Sensor(s) are of a passive type to be regarded as 'simple apparatus'.
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
FISCO field device
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 I.S. interface may be used that meets the following requirements:
FISCO power supply
Uo d 24 V or Uo d 17.5 V
Io d 250 mA Io d 380 mA
Po d 1.2 W Po d 5.32 W
Co t 220 pF + Ccable; Lo t 0 μH + Lcable
x Electrical data of the PH202S-B & PH202S-D (Type of protection “n”)
-
Supply and output circuit:
Maximum input voltage Ui = 32 V
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 = 3.5 μF
Maximum allowed external inductance Lo = 76 mH