Rosemount 2240S, Reference Manual

Page: 37 / 100

Reference Manual
300550en, Rev AA
December 2010
4-11
Rosemount 2240S
Section 4. 2240S Installation
4.4.8 Tankbus Wiring
Follow this procedure to connect the Rosemount 2240S:
1. Ensure that the power supply is switched off.
2. Loosen the four screws and remove the cover on the terminal
compartment.
Figure 4-4. 2240S terminal
compartment
3. Run the Tankbus wires through the appropriate cable glands or conduits.
4. Connect the Tankbus wires to the X2 and X3 terminals as shown in
Figure 4-4.
5. Connect the cable shield to the terminal marked X1.
6. Use metal plugs to seal unused ports.
7. In order to prevent water from entering the terminal compartment, ensure
the cover sealing is placed in the correct position
8. Attach and tighten the cover on the terminal compartment. Ensure that
the cover is fully engaged to meet explosion-proof requirements and to
prevent water from entering the terminal compartment.
9. Tighten the conduit/cable glands. Note that adapters are required for
M20 glands
NOTE!
Ensure that o-rings and seats are in good condition prior to mounting the
cover in order to maintain the specified level of ingress protection. The same
requirements apply for cable inlets and outlets (or plugs). Cables must be
properly attached to the cable glands.
Daisy-chain connection
to other field devices
(page 4-12)
X2: Tankbus (+) output
X3: Tankbus (-) output
Jumper to
invoke built-in
termination
X4: Tankbus
terminator
X1: Cable Shield
X2: Tankbus (+) input
X3: Tankbus (-) input
Internal grounding
terminals
Cable glands for
Tankbus wires and
temperature elements