YOKOGAWA SC202G(S), User Manual

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IM 12D7B3-E-H
2-5 Specifications
Unclassified Location
Output
Supply
+
_
G
Classified Location
Protective
earth
+
_
FM Approved
Power supply
(HART compatible)
Intrinsically safe design
FM Class I. Div. 1, Group ABCD: T4 for ambient temperature < 55 ºC
T6 for ambient temperature < 40 ºC
EXA SC202S analyser
see text below
For electrical data:
Classified Location
Unclassified Location
+
_
G
Protective
earth
Protective
earth
+
_
Load
Resistance
24 volts DC Nominal
Supply Voltage.
Safety barrier or power supply
(HART compatible)
Intrinsically safe design FM Approved
FM Class I. Div. 1, Group ABCD: T4 for ambient temperature < 55 ºC
T6 for ambient temperature < 40 ºC
EXA SC202S analyser
with R
int
= 300 Ω
For electrical data:
see text below
SENSOR(S)
terminal 11-16
Max. cable length: 60 mtr.
Cable diam.: 3 to 12mm
SENSOR(S)
terminal 11-16
Max. cable length: 60 mtr.
Cable diam.: 3 to 12mm
Figure 1
Figure 2
Suitable values are:
Voc or Vt ≤ 31.5 Volt DC
lsc or lt ≤ 100 mA
Psc or Pt ≤ 1.2 Watt
Suitable values are:
Voc or Vt ≤ 31.5 Volt DC
Isc or It ≤ 100 mA
• Electrical data of the EXA SC202S:
- Supply circuit (ter and -): - Sensor input circuit (terminals 11 through 16):
Maximum input voltage V
max
= 31.5 V. - Maximum output voltage V
t
= 14.4 V.
Maximum input current I
max
= 100 mA. - Maximum output current I
t
= 12.8 mA.
Maximum input power P
i
= 1.2 W. - Maximum allowed external capacitance C
a
= 103 nF.
Effective internal capacitance C
i
= 22 nF. - Maximum allowed external inductance L
a
= 200 mH.
Effective internal inductance L
i
= 22 µH.
• If Hand Held Terminal (HHT) is not connected to the power supply lines of the EXA SC202S (see figure 1):
Any FM Approved barrier or power supply may be used that meets the following requirements.
V
oc
or V
t
≤
31.5 V; I
sc
or I
t
≤
100 mA; C
a
≥
22 nF + C
cable
; L
a
≥
22 µH + L
cable
If HHT is connected to the power supply lines of the EXA SC202S (see figure 2):
The Hand Held Terminal must be FM Approved. Refer to the manufacturers control drawing of the HHT and the barrier/power
supply to determine the cable parameters.
(V
oc
or V
t
) + V
HHT
≤
31.5 V; (I
sc
or I
t
) + I
HHT
≤
100 mA; C
a
≥
22 nF + C
cable
+ C
HHT
; L
a
≥
22 mH + L
cable
+ L
HHT
When installing this equipment, follow the manufacturer’s installation drawing.
Installation should be in accordance with ANSI/ISA RP 12.06.01 "Installation of Intrinsically Safe Systems for Hazardous
(Classified) Locations" and the National Electrical Code (ANSI/NFPA 70).
Control equipment connected to the barrier/power supply must not use or generate more than 250 Vrms or Vdc.
• Resistance between Intrinsically Safe Ground and earth ground must be less than 1.0
Ω
WARNING
- Substitution of components may impair Intrinsic Safety
To prevent ignition of flammable or combustible atmospheres, disconnect power before servicing or read, understand and
adhere to the manufacturer’s’live maintenance procedures.
FM intrinsic safe diagrams for SC202S-A