Rosemount 848T Uživatelský manuál stáhnout pdf (Strana 6)

Quick Installation Guide

00825-0100-4697, Rev DB

September 2011

Rosemount 848T

STEP 2 CONTINUED...

Typical Configuration for FOUNDATION fieldbus Networking

NOTE

Each segment in a F

OUNDATION fieldbus trunk must be terminated at both ends.

Ground the Transmitter

Proper ground is crucial to reliable temperature readings.

Ungrounded Thermocouple, mV, and RTD/Ohm Inputs

Option 1:

1. Connect F

OUNDATION fieldbus signal wiring shield to the sensor wiring shield(s).

2. Ensure the shields are tied together and electrically isolated from the transmitter enclosure.

3. Only ground the shield at the power supply end.

4. Ensure that the sensor shield(s) is electrically isolated from the surrounding

grounded fixtures.

Power

Supply

Terminators

Integrated Power

Conditioner and Filter

(Spur)

FOUNDATION

™

fieldbus Host or

configuration tool

6234 ft (1900 m) max

(Trunk)

Signal Wiring

(depending upon cable characteristics)

Sensor Wires

Power

Supply

Shield ground point

848T

1 2 3 4 5 6 7 8 9 10 11 ... 19 20

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Rosemount 848T Uživatelský manuál Strana 6