Table 14 Wiring The Transmitter - Honeywell ST 3000 User Manual

Step
Loosen end-cap lock using a 1.5 mm allen wrench and remove end-cap cover from terminal
1
block end of electronics housing.
2 Feed loop power leads through one of conduit entrances on either side of electronics housing.
Plug whichever entrance you do not use.
The transmitter accepts up to 16 AWG wire.
3 Observing polarity, connect positive loop power lead to SIGNAL + terminal and negative loop
power lead to SIGNAL – terminal. See figures.
3-screw terminal block
Loop
Power
+
-
4 Replace end-cap, and tighten end-cap lock.
Approval body requirements
If your transmitter was ordered with Table III option 3N for self-declared approval per 94/9/EC (ATEX4),
you must use a power supply that includes a voltage limiting device that will keep the voltage to the
transmitter from exceeding 42 Vdc. You can achieve this by using a battery as the supply or one of these
voltage limiting means.
• Double wound mains transformer per BS 3535 or equivalent.
• An adequately rated zener diode whose voltage is not significantly higher than the rated voltage.
• An adequately rated semiconductor voltage regulator.
10/05

Table 14 Wiring the Transmitter

ST 3000 HART Transmitter Release 300 User Manual
4— Installation - Wiring ST 3000 Transmitter
Action
5-screw terminal (option LP)
Loop
Power
+
-
+
-
+
-
L
+
- -
+
-
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