2-4 Specifications
IM 12D7B3-E-H
Safe area
Output
Supply
SENSOR(S)
terminal 11-16
+
_
G
Hazardous area
Safe area
+
_
G
Protective
earth
Protective
earth
+
_
Load
Resistance
Hazardous area
Protective
earth
+
_
24 volts DC Nominal
Supply Voltage.
SENSOR(S)
terminal 11-16
CSA certified
Safety barrier or power supply
(Hart compatible)
Intrinsically safe design
CSA Ex ia Class I, Div. 1, Group ABCD, T4 for ambient temp. < 55 ºC
EXA SC202S analyzer
T6 for ambient temp. < 40 ºC
CSA certified
Power supply
(Hart compatible)
For electrical data:
see text below
For electrical data:
see text below
Suitable values are:
V
max
= 31.5 Volts DC
I
max
= 100 mA
Suitable values are:
V
max
= 31.5 Volts DC
I
max
= 100 mA
P
max
= 1.2 Watt
Intrinsically safe design
CSA Ex ia Class I, Div. 1, Group ABCD, T4 for ambient temp. < 55 ºC
EXA SC202S analyzer
T6 for ambient temp. < 40 ºC
with Rint = 300 Ohm
Figure 1
Figure 2
•
Sensor is a thermocouples, RTD’s, passive resistive switch devices, or is CSA entity approved and meet connection requirements.
•
Electrical data of the EXA SC202S :
- Supply and output circuit (ter and -)
Maximum input voltage V
max
= 31.5 V.
Maximum input current I
max
= 100 mA.
Maximum input power P
max
= 1.2 W.
Effective internal capacitance C
i
= 22 nF.
Effective internal inductance L
i
= 22 µH.
- Sensor input circuit (terminals 11 through 16):
Maximum output voltage V
oc
= 14.4 V.
Maximum output current I
sc
= 12.8 mA.
Maximum allowed external capacitance C
a
= 103 nF.
Maximum allowed external inductance L
a
= 200 mH.
•
Barriers and power supply should be CSA certified. The specifications must not exceed the maximum values as shown in the dia-
gram above. Installation should be in accordance with Canadian Electrical Code, Part I or CEC, 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 16) is
non-incendive having the parameters:
Maximum output voltage V
oc
= 14.4 V.
Maximum output current I
sc
= 12.8 mA.
Maximum allowed external capacitance C
a
= 1.4 µF.
Maximum allowed external inductance L
a
= 900 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.
CSA intrinsic safe and non-incendive diagrams for SC202S-A
Содержание SC202G(S)
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