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/T 4/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
exceeded within the frame of the manufacturer's specifications, e.g., concerning 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 current 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
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 electro-
statically conductive (< 1 MΩ).
