18 ST 800 Pressure Transmitter User’s Manual Revision 15
Note that V
SM
should only be considered if a remote meter will be connected to the transmitter.
The positive and negative loop wires are connected to the positive (+) and negative (–) terminals on the
terminal block in the transmitter electronics housing.
Barriers can be installed per Honeywell’s instructions for transmitters to be used in intrinsically safe
applications.
3.6.2 Digital System Integration Information
Transmitters that are to be digitally integrated to Honeywell’s Total Plant Solution (TPS) system will be
connected to the pressure transmitter interface module in the Process Manager, Advanced Process
Manager or High-Performance Process Manager through a Field Termination assembly. Details about the
TPS system connections are given in the PM/APM SmartLine Transmitter Integration Manual, PM12-
410, which is part of the TDC 3000
X
system book set.
If you are digitally integrating a transmitter in an Allen Bradley Programmable Logic Controller (PLC)
process system, the same Field Terminal assembly (FTA) and wiring procedures used with Honeywell’s
TPS system are also used with the Allen-Bradley 1771 and 1746 platforms.
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 system book set.
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 (8.37mm
2
)
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.
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