Loop Wiring Procedure For Hart/De Variants; Power Supply Wiring (Modbus) Procedure - Honeywell SMV800 SmartLine User Manual

5.3.3 Loop Wiring Procedure for HART/DE variants

Step
1
See Figure
Remove the end cap cover from the terminal block end of the electronics housing.
2
Feed loop power leads through one end of the conduit entrances on either side of the
3
electronics housing. The transmitter accepts up to 16 AWG wire.
to be grounded on the supply/host side.
Connect the positive loop power lead to the positive (+) terminal and the negative loop
4
power lead to the negative (-) terminal. Note that the transmitter is not polarity
sensitive.
5
Feed input sensor wires through the 2
Replace the end cap and secure it in place.
6
Note: In HART/DE variants Terminal #3 is used for loop test.
Transmitter loop parameters for HART/DE variants are as follows:
R = maximum loop resistance (barriers plus wiring) that will allow proper Transmitter
LOOP MAX
operation and is calculated as R
In this calculation:
V
XMTR MIN (HART)
V
XMTR MIN (DE)
V =Remote meter and/or other peripheral device
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Note that V should only be considered if a remote meter will be connected to the transmitter.
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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.

5.3.4 Power Supply Wiring (Modbus) Procedure

Step
1
See Figure 14
Allen wrench.
Remove the end cap cover from the terminal block end of the electronics housing.
2
Feed twisted pair shielded power supply leads through one end of the conduit
3
entrances on either side of the electronics housing. The transmitter accepts up to 16
AWG wire. Shield of the cable to be grounded on the supply/host side.
Connect the positive power supply lead to the positive (+) terminal (Terminal #1) and
4
negative power supply lead to the negative (-) terminal (Terminal #2). Note that the
transmitter is not polarity sensitive. See
5
Modbus communication wires can be fed through the same conduit that is being used
for feeding power supply inputs. For details related to Modbus connection refer to
Table 10 and Section 5.3.5.
6 Feed input sensor wires through the 2
Replace the end cap and secure it in place.
7
Revision 10
14, above, for parts locations.
= (V
LOOP MAX
= 10.8 V + V
= 15 V + V
SM
above, for parts locations. Loosen the end cap lock using a 1.5 mm
SMV800 Transmitter User's Manual
Action
nd
conduit entrance and connect wire.
)  21.8 mA.
– V
SUPPLY MIN XMTR MIN
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Action
Figure 17.
nd
conduit entrance and connect wire.
Shield of the cable
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