8.7 Torques
Torques
Terminal compartment
● Connecting terminals
0.4 to 0.8 Nm (0.3 to 0.6 ft lb)
Cable glands/blanking plugs
● Screw-in torque for plastic gland in all enclosures
4 Nm (3 ft lb)
● Screw-in torque for metal/stainless steel glands in
aluminum/stainless steel enclosure
6 Nm (4.4 ft lb)
● Screw-in torque for NPT adapter made of metal/stainless
steel in aluminum/stainless steel enclosure
15 Nm (11.1 ft lb)
● Tightening torque for union nut made of plastic
2.5 Nm (1.8 ft lb)
● Tightening torque for union nut made of metal/stainless
steel
4 Nm (3 ft lb)
Screws for mounting bracket (option)
● Tightening torque for thread M8 or
5
/
16
-24 UNF
18 Nm (13.2 ft lb)
● Tightening torque for thread M10 or
7
/
16
-20 UNF
36 Nm (26.5 ft lb)
Retaining screws for rotation of the enclosure
● Tightening torque for aluminum enclosure
3.8 Nm (2.8 ft lb)
● Tightening torque for stainless steel enclosure
3.5 Nm (2.5 ft lb)
8.8 Display, keyboard and auxiliary power
Display and user interface
Buttons 4 buttons for operation directly on the device
Display
● With or without integrated display (optional)
● Cover with inspection window (optional)
Auxiliary power U
H
HART
Terminal voltage on pressure transmitter
● DC 10.5 V … 45 V
● In the case of intrinsically safe operation 10.5 V … 30 V
DC
Ripple U
SS
≤ 0.2 V (47 … 125 Hz)
Noise U
eff
≤ 1.2 mV (0.5 … 10 kHz)
Auxiliary power –
Separate supply voltage –
Technical data
8.8 Display, keyboard and auxiliary power
SITRANS P320/P420 with 4 to 20 mA/HART
Compact Operating Instructions, 09/2018, A5E38874562-AB 99
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