Installation Manual

Rosemount Tank Radar REX

308014EN, Edition 4

Chapter 11 Electrical Installation of the

May 2013

 

 

11.5Connecting the Radar Tank Gauge 3900

The RTG 3900 is equipped with two cable outputs for intrinsically safe and non-intrinsically safe connections. Wires are clearly marked with numbers and designation of wires is shown on a printed plate at the cable outputs. The transmitter can also be equipped with an integrated junction box (JBi).

TH3900_Twoversions.eps

Integrated Junction Box (JBi)

W12 Intrinsically safe

W11 Non-Intrinsically

connections (EEx i)

safe connections (EEx e)

Figure 11-2. Electrical connections on the RTG 3900 REX.

W11 is for the non-intrinsically safe power supply, the TRL/2 Bus and relays. The power supply and the TRL/2 Bus can be connected via an external junction box, or directly to the transmitter if it is equipped with the Integrated Junction Box. See Chapter 8: Junction Boxes for further information on how to use the different Junction Boxes. An external junction box can either be customer supplied or supplied by Emerson Process Management/Rosemount Tank Gauging as an option.

Wires in the cable output that are not used must be properly insulated and terminated in the junction box.

W12 is for the intrinsically safe connection of Data Acquisition Unit (DAU), Display Panel RDU40, analog inputs and temperature sensors. There are two versions of the W12 cabling: 8 or 15 wires. The 15 wire version is used when temperature sensors are connected to the transmitter.

11-4

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Emerson 308014EN, Edition 4 installation manual 11-4, Connecting the Radar Tank Gauge
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308014EN, Edition 4 specifications

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