Safety notes
2.3 Installation in hazardous area
SITRANS FCS200
Operating Instructions, 02/2011, A5E02508199-01
11
Table 2- 3 Sensor circuit
Sensor circuit (Terminal 5-6 and 7-8)
U
i
30 V DC
I
i
50 mA
P
i
0.4 W
C
i
Insignificant
L
i
14 mH
Uo 0.3 V AC
Temperature specifications for use in hazardous area
Table 2- 4 Temperature specifications
Temperature class Max. process temperature [°C] Ambient temperature [°C]
T4 125 -40 ... +60
T5 70 -40 ... +60
Special conditions for safe use
It is required that:
● Electrical connections are in accordance with IEC/EN60079-14 (Installing Electrical
Systems in Explosion Hazardous Areas).
● The protective cover over the power supply is properly installed. For intrinsically safe
circuits the connection area can be opened.
● Appropriate cable connectors are used for the output circuits:
– Intrinsically safe: blue
– Non-intrinsically safe: black
● Sensor and transmitter are connected to potential equalization.
For intrinsically safe output circuits potential equalization must be maintained along the
entire connection path.
● When protective earth (PE) is connected, no potential difference between the protective
earth (PE) and the potential equalization (PA) can exist, even during a fault condition.
To Next Page
Loading...
