Hazardous Areas: Electrical and Thermal Parameters
For Sensors with VP and S8 Connector
Certificate Number:
Marking:
PTB 14 ATEX 2004
II 1/2 G Ex ia IIC T3/T4/T6 Ga/Gb
Electrical Parameters:
• From a safety perspective, all circuits including the cable shield shall be considered as galvanically
connected to ground.
• Metallic process connection parts shall be included in the local equipotential bonding system.
• The effective internal inductance L
i
and capacitance C
i
are negligibly small.
For Sensors with Temperature Detector (VP Connector):
Temperature class
Maximum input
voltage U
i
Maximum input
current I
i
Maximum input
power P
i
T6
12 V
30 mA
50 mW
T4
15 V
80 mA
110 mW
T3
18 V
170 mA
200 mW
For Sensors without Temperature Detector (S8 Connector):
Temperature class
Maximum input
voltage U
i
Maximum input
current I
i
Maximum input
power P
i
T6, T4, T3
18 V
170 mA
200 mW
Thermal Parameters:
The integrity of the equipment is not impaired when the standardized atmospheric conditions are ex-
ceeded within the limits of the manufacturer's specifications, e.g., with regard to ambient temperature
and pressure.
For Sensors with Temperature Detector (VP Connector):
The maximum heating to be considered with regard to the temperature class is consistently based on
the available power of the externally connected circuits and is 427 K/W in air. The maximum permissible
ambient temperature is 40 °C.
Temperature class
Maximum input power P
i
Maximum permissible process temperature
T6
50 mW
55° C
T4
110 mW
80 °C
T3
200 mW
110 mW
100 °C
135 °C
For Sensors without Temperature Detector (S8 Connector):
The maximum heating to be considered with regard to the temperature class is negligibly low.
The maximum permissible ambient temperature is 60 °C.
Temperature class
Maximum input power P
i
Maximum permissible process temperature
T6
200 mW
80° C
T4
200 mW
130 °C
T3
200 mW
135 °C
Special Conditions
None
For Sensors with Memosens Connector
Certificate Number:
Marking:
BVS 16 ATEX E 037 X
IECEx BVS 16.0030X
II 1G
Ex ia IIC T3/T4/T6 Ga
Thermal Parameters:
Temperature class
Ambient temperature range Ta Maximum permissible process temperature
T6
-20 °C < Ta < +70 °C
70 °C
T4
-20 °C < Ta < +120 °C
120 °C
T3
-20 °C < Ta < +135 °C
135 °C
Special Conditions
• The cable and the sensor shall only be used within the ambient temperature range specified for the
temperature class.
• The measuring cable including its connecting head must be protected from electrostatic charging
if it passes through areas of Zone 0 (category 1G).
• The Memosens sensors shall not be operated in electrostatically critical processing conditions.
Intense vapor or dust flows directly impacting on the connection system shall be avoided.
• Metallic process connection parts must be mounted at the installation site so that they are
electrostatically conductive (< 1 MΩ).
