Lightning Protection; Supply Voltage Limiting Requirements; Process Sealing; Explosion-Proof Conduit Seal - Honeywell SLG 700 User Manual

3.3.6 Lightning Protection

If your Transmitter includes the optional lightning protection, connect a wire from the
Earth Ground Clamp (see
protection effective. Use a size 8AWG or (8.37mm
connection.

3.3.7 Supply Voltage Limiting Requirements

If your Transmitter complies with the ATEX 4 directive for self-declared approval per
94/9EC or 2014/34/EU, the power supply must include a voltage-limiting device. Voltage
must be limited such that it does not exceed 42V DC. Consult the process design system
documentation for specifics.

3.3.8 Process Sealing

The SLG 700 SmartLine Guided Wave Radar Level Transmitter is available as FM and
CSA-certified as a Dual Seal device in accordance with ANSI/ISA–12.27.01–2003,
"Requirements for Process Sealing between Electrical Systems and Flammable, or
Combustible Process Fluids".

3.3.9 Explosion-Proof Conduit Seal

When installed as explosion-proof or flame-proof in a hazardous
location, keep covers tight while the transmitter is energized. Disconnect
power to the transmitter in the non-hazardous area prior to removing
end caps for service.
When installed as non-incendive or non-sparking equipment in a
hazardous location, disconnect power to the transmitter in the non-
hazardous area, or determine that the location is non-hazardous before
disconnecting or connecting the transmitter wires.
Transmitters installed as explosion proof in Class I, Division 1, Group A Hazardous
(classified) locations in accordance with ANSI/NFPA 70, the US National Electrical
Code, with ½" conduit do not require an explosion-proof seal for installation. If ¾"
conduit is used, a LISTED explosion proof seal is to be installed in the conduit, within
18" (457.2mm) of the transmitter.
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Figure 3-37) to Earth Ground as short as possible to make the
SLG 700 SmartLine Level Transmitter User's Manual
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) bare or green covered wire for this
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