Connecting the Field Communication Unit, FCU

	Installation Manual
Rosemount Tank Radar REX	308014EN, Edition 4
Chapter 6 The Field Communication Unit	May 2013

6.4Connecting the Field Communication Unit, FCU 2160

6.4.1Power Supply

There is a switch to select the supply voltage to either 115 V or 230 V. Check that the switch is set in the right position before power is connected. The switch is set to 230 V as standard.

If the switch is set to 115 V, mark the check-box on the nameplate: “Mark box if re-wired for 115 VAC”:

FCU_2160_Label.eps

Figure 6-4. FCU marking for 115 VAC.

Note!	Do not turn the switch all the way around as it may damage the switch.

FCU_Power.eps

6.4.2

30 11

Figure 6-5. Selecting the FCU power supply voltage.

Connection to a PC

The FCU can be connected to the PC either directly via RS-232C or via a Field Bus Modem (FBM) on the TRL/2 Group Bus.

The TRL/2 Bus requires a twisted and shielded pair with an area of min 0.50 mm2 (AWG 20 or similar). See chapter 11.2.

The RS-232C connection can be made with 3 wires from the PC to the Field Communication Unit. The area must be at least 0.25 mm2 (AWG 24 or similar). The maximum length of the RS-232C connection is 30 m.

6-4

308014EN, Edition 4 specifications

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Emerson 308014EN, Edition 4 Connecting the Field Communication Unit, FCU, Connection to a PC

Models: 308014EN Edition 4

Installation Manual