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3.6.3 Wiring Variations
The above procedures are used to connect power to a Transmitter. For loop wiring and external
wiring, detailed drawings are provided for Transmitter installation in non-intrinsically safe areas and
for intrinsically safe loops in hazardous area locations.
If you are using the Transmitter with Honeywell's TPS system, see PM/APM Smartline Transmitter
Integration Manual, PM12-410, which is part of the TDC 3000
3.6.4 Wiring Procedure
1. See Figure 15, above, for parts locations. Loosen the end cap lock using a 1.5 mm Allen wrench.
2. Remove the end cap cover from the terminal block end of the Electronics Housing.
3. Feed loop power leads through one end of the conduit entrances on either side of the
Electronics Housing. The Transmitter accepts up to 16 AWG wire.
4. Plug the unused conduit entrance with a conduit plug appropriate for the environment.
5. Connect the positive loop power lead to the positive (+) terminal and the negative loop power
lead to the negative (-) terminal. Note that the Transmitter is not polarity-sensitive.
6. Replace the end cap, and secure it in place.
3.6.5 Lightning Protection
If your Transmitter includes the optional lightning protection, connect a wire from the Earth Ground
Clamp (see Figure 15) to Earth Ground to make the protection effective. Use a size 8 AWG or
2
(8.37mm
) bare or green covered wire for this connection.
3.6.6 Supply Voltage Limiting Requirements
If your Transmitter complies with the ATEX 4 directive for self-declared approval per 94/9EC, the
power supply has to include a voltage-limiting device. Voltage must be limited such that it does not
exceed 42 V DC. Consult the process design system documentation for specifics.
3.6.7 Process Sealing
The ST 800 SmartLine Pressure Transmitter is 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."
3.6.8 Explosion-Proof Conduit Seal
When installed as explosion proof in a Division 1 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 equipment in a Division 2 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 1/2 inch conduit
do not require an explosion-proof seal for installation. If 3/4 inch conduit is used, a LISTED
explosion proof seal to be installed in the conduit, within 18 inches (457.2 mm) of the transmitter.
Page 22
ST 800 SmartLine Pressure Transmitters User's Manual
X
system bookset.
Revision 10
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