Siemens SITRANS P Operating Instructions Manual page 240

Technical data
13.10 Certificates and approvals
Explosion protection in accordance with ATEX
● Type of protection for Zone 2
A power supply unit of intrinsically safe protection
type "Ex ia" in zone 2 is sufficient to connect devices
of intrinsically safe protection type [Ex ic].
Designation
Permissible ambient temperature "ec"
Permissible temperature of medium
Connection "ec"
240
II 3G Ex ec IIC T4/T6 Gc
-40 ... +80 °C (-40 ... +176 °F) temperature class T4
-40 ... +40 °C (-40 ... +104 °F) temperature class T6
-40 ... +100 °C (-40 ... +212 °F) temperature class T4
-40 ... +70 °C (-40 ... +158 °F) temperature class T6
To a circuit with the operating values:
U = 10.5 to 30 V, 4 ... 20 mA
n
Operating Instructions, 11/2019, A5E44852162-AC
SITRANS P320/P420 with 4 to 20 mA/HART