Filter
Top Products
Rosemount Tank Radar REX
Chapter 6 The Field Communication Unit
6-4
Installation Manual
308014EN, Edition 4
May 2013
6.4 Connecting the Field Communication Unit, FCU 2160
6.4.1 Power 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”:
Figure 6-4. FCU marking for 115 VAC.
Note! Do not turn the switch all the way around as it may damage the switch.
Figure 6-5. Selecting the FCU power supply voltage.
6.4.2 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 mm
2
(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 mm
2
(AWG 24
or similar). The maximum length of the RS-232C connection is 30 m.
FCU_2160_Label.eps
30
11
FCU_Power.eps