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User's Guide
308010EN, Edition 2
July 2007
1.
Installation
Remove the rubber plug for access to the upper screw of the RDU40
cover. Unscrew and remove all six screws. Remove the cover and take
care of the locking device for the weather protection hatch.
The RDU40 shall be connected to the TankRadarREX junction box for
cable connections.
RDU 40
Slave (optional)
Figure 1-1. Installation of RDU40 master and slave.
Any of the three cable glands may be used to take the cable into the
RDU40:
•
•
External adapters 1/2 NPT and 3/4 NPT are optional.
Connect the RDU40 to the X12 terminal (also marked "Exi") in the REX
junction box as described in picture 1. Requirements for the cable
between the RDU40 and the REX junction box to fulfill performance
regarding functionality and EMC are:
•
•
•
•
Cover/
Display
Jumper Position 2
2xM20 – Cable diameter min 7 mm, max 14 mm.
1xM25 – Cable diameter min 9 mm, max 18 mm.
Shielded cable. Minimum 3 wires. The shield shall be circular con-
nected inside the cable gland of the RDU40 and connected to
ground in the REX junction box.
All wires must have at least 0.25 mm individual insulation.
Maximum total length of 100 m, both master and slave included.
Minimum AWG 20 or 0.5 mm
Rosemount Tank Radar REX
Chapter 1 Installation
Cover/
Display
RDU 40
Jumper Position 1
Master
2
for each wire.
1-1
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