YOKOGAWA PH202G User Manual

IM 12B07D02-01E
Specification 2-11
2-8. Control Drawing of PH202S mA HART
®
Specification (CSA).
Safe area
Vmax = 31.5 VoltDC
Imax = 100 mA
Pmax = 1.2 Watt
CSA certified
Power Supply
(HART compatible) )
Output
Supply
Sensor(s)
terminals 11-17
+
_
G
Sensor(s)
terminals 11-17
Hazardous area Safe area
+
_
G
Functional
earth
earth
Intrinsically safe design
(pH/ORP-transmitter)
PH202S
+
_
Load
Resistance
Imax = 100 mA
Vmax = 31.5 VoltDC
Hazardous area
earth
+
_
24 volts DC Nominal
Supply Voltage.
Intrinsically safe design
CSA Ex ia Class I, Div.1, Group ABCD
T4 for ambient temp. < 55°C
T6 for ambient temp. < 40°C
(pH/ORP-transmitter)
PH202S
CSA certified
safety barrier or power supply
Suitable values are:
(HART compatible)
CSA Ex ia Class I, Div.1, Group ABCD
T4 for ambient temp. < 55°C
T6 for ambient temp. < 40°C
For electrical data:
see text below.
For electrical data:
see text below.
Suitable values are:
Functional
Functional
・Sensor(s) are thermocouples, RTD’s, passive resistive switch devices, or are CSA entity approved
and meet connection requirements.
・Electrical data of the PH202S.
- Supply and output circuit (terminals + and -):
Maximum input voltage Vmax = 31.5 V. Maximum input current Imax = 100 mA.
Maximum input power Pmax = 1.2 W.
Effective internal capacitance Ci = 22 nF. Effective internal inductance Li = 35 PH.
- Sensor input circuit (terminals 11 through 17):
Maximum output voltage Voc = 14.4 V. Maximum output current Isc = 32.3 mA.
Maximum allowed external capacitance Ca = 600 nF
Maximum allowed external inductance La = 34 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.
Maximum safe area voltage should not exceed 250 VRMS.
For Class I, Div. 2, Group ABCD the CSA certified barrier is not required, and the Sensor
input circuit (terminals 11 through 17) is non-incendive having the parameters :
Maximum output voltage Voc = 14.4 V. Maximum output current Isc = 32.3 mA.
Maximum allowed external capacitance Ca = 3.5 PF.
Maximum allowed external inductance La = 76 mH.
・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, or of a
CSA certified
non-incendive type in case it is used on the non-incendive circuit in the
hazardous area.

YOKOGAWA PH202G Specifications

General

Brand	YOKOGAWA
Model	PH202G
Category	Transmitter
Language	English