Transient And Lightning Considerations - Emerson Rosemount 928 Reference Manual

Reference Manual
00809-0100-4928
C.3.2 Antenna height
Mount antenna 14 ft. (4.3 m) above infrastructure with clear line of sight.
C.3.3 Coaxial cable
Ensure that coaxial cable is securely affixed to the mast to avoid excessive cable
movement.
C.3.4 Install coaxial drip loop
Ensure a drip loop is installed not closer than 1 ft. (0.3 m) from the transmitter. It may also
be convenient to affix the drip loop to the lower portion of the mast ensuring that
condensation or rainwater will flow away from the coaxial connections.
Figure C-1: Coaxial Drip Loop
A. Coaxial drip loop
C.3.5 Apply coaxial sealant moisture protection
Use the coaxial sealant included in the high gain remote mounting kit package. Follow the
included instructions for application on the coaxial connection.
C.4

Transient and lightning considerations

C.4.1 Wireless gateway transient protection
When installing the antenna, consider using transient and lightning protection (customer-
supplied) on Ethernet, Modbus
C.4.2 RF lightning arrestor ground connection
Ensure that a grounding connection is made on the RF lightning arrestor ground
connection point.
Rosemount 928
A
®
, and coaxial interface to other equipment.
High gain remote antenna option
September 2019
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