Yokogawa EXA PH202 2-Wire pH/ORP Analyzer - Manual (Page 24)

IM 12B07D02-01E
Specification 2-11
2-8. Control Drawing of PH202S mA HART® Specification (CSA).
S a fe a re a
V m ax = 3 1 .5 V o ltD C
Im ax = 1 0 0 m A
P m ax = 1 .2 W att
C S A certified
P ow e r S upp ly
(H A R T c o m pa tib le ) )
O utput
S upp ly
S en sor(s)
term in als 1 1 -1 7
+
_
G
S en sor(s)
term in a ls 1 1 -1 7
H azard ous area S a fe are a
+
_
G
Func tional
e a rth
e a rth
Intrins ic a lly sa fe de sign
(p H /O R P -transm itter) P H 20 2S
+
_
Load
R e sistanc e
Im ax = 1 0 0 m A
V m ax = 3 1 .5 V o ltD C
H azard ous area
earth
+
_
24 volts D C N o m ina l
S upp ly V oltage.
Intrins ic a lly sa fe de sign
C S A E x ia C la ss I, D iv.1 , G roup A B C D
T 4 for a m bient te m p . < 5 5°C
T 6 fo r am b ient tem p . < 4 0°C
(p H /O R P -transm itter) P H 2 02 S
C S A certified
safe ty ba rrie r o r po w er sup ply
S u itable valu es are:
(H A R T com patible )
C S A E x ia C lass I, D iv.1 , G roup A B C D
T 4 fo r am b ient tem p . < 5 5°C
T 6 fo r am b ient tem p . < 4 0°C
Fo r electrical d ata:
see text belo w .
Fo r electrical d ata:
see text belo w .
S uita b le value s a re:
Functio na l
Func tional
・ 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.