Siemens SIPART PS2 Series Operating Instructions Manual page 78

Connection
5.1 Basic safety instructions
NOTICE
Condensation in the device
Damage to device through formation of condensation if the temperature difference between
transportation or storage and the mounting location exceeds 20 °C (36 °F).
● Before taking the device into operation, let the device adapt for several hours in the new
Two-wire mode
NOTICE
Connection of voltage source to current input
Device damage if a voltage source is connected to the current input I
● Never connect the current input I
● Always use a high-impedance power source.
● Observe the static destruction limit specified in the "Electrical data (Page 246)".
Note
Improvement of interference immunity
● Lay signal cables separate from cables with voltages > 60 V.
● Use cables with twisted wires.
● Keep device and cables at a distance from strong electromagnetic fields.
● Take account of the conditions for communication specified in the Electrical data
(Page 246).
● Use shielded cables to guarantee the full specification according to HART/PA/FF/Modbus/
EIA-485/Profibus DP.
Electromagnetic compatibility
The polycarbonate enclosure is metalized from inside to increase the electromagnetic
compatibility (EMC) with respect to high-frequency radiation. The shield is connected to the
threaded bush shown in the following picture such that it is electrically conductive.
Note that this protection is effective only if you connect at least one of these bushes to the
earthed control valves through electrically conductive (bare) attachments.
78
environment.
positioner may be destroyed.
to a low-resistance voltage source, otherwise the
w
Operating Instructions, 11/2019, A5E00074631-AE
(terminals 6 and 7).
w
SIPART PS2 with 4 to 20 mA/HART