Emerson MSP422 Manual de usuario Pagina 18

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Reference Manual
IP2013, Rev BA
February 2012
Mobrey MSP422
3-8
Lightning / Surge
Protection and Other
Loop Devices
If the area is prone to lightning strikes or voltage surges, a suppressor device
may be installed between the transmitter and the control unit.
If an additional loop-powered device or separately powered device is included
in the two-wire loop, the transmitter must receive a minimum voltage of
12 Vdc at 21 mA loop current. (See "Load Limitations" on page A-2).
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