42
Reference Manual
00809-0100-2240, Rev DA
October 2017
4.4.10
Daisy-chain connection
The Rosemount Tank Gauging system supports daisy-chain connection of devices to the Tankbus. To
daisy-chain the Rosemount 2240S to other devices do the following:
1. Make sure the power supply is switched off.
2. Loosen the four screws and remove the cover from the terminal compartment.
3. Disconnect the termination jumper from the X3 terminal, see
.
4. Run the Tankbus cable into the Rosemount 2240S through an appropriate gland.
5. Connect the Tankbus wires to the
X2 output
and
X3 output
.
6. Connect the cable shield to the X1 terminal.
7. Attach and tighten the cover on the terminal compartment. Ensure the cover sealing is placed in the
correct position.
8. Tighten the conduit/cable glands. Note that adapters are required for M20 glands.
A typical wiring diagram with a Rosemount 2240S is illustrated in
. In the example below the
2240S is daisy-chained to a Rosemount 5900S Radar Level Gauge and a Rosemount 2230 Graphical Field
Display.
Figure 4-7. Rosemount 2240S Wiring Diagram
Ensure that there are only two terminators enabled on the Tankbus. In the example above, one
terminator is enabled in the Rosemount 2410 Tank Hub. The second terminator is enabled in the
terminal compartment of the Rosemount 2230 Display since this is the last device on the Tankbus
segment. Incorrect terminations may cause malfunctioning communication on the Tankbus.
Tankbus
Rosemount TankMaster
Rosemount 2460 System Hub
Rosemount 2410
Tank Hub
Rosemount 2230
Display
Field Bus
Modem
TRL2 Modbus
Rosemount 5900S
Radar Level Gauge
Rosemount 2240S
Multi-input Temperature
Transmitter
Built-in
terminator
enabled on the
last device
Summary of Contents for Rosemount 2240S
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Page 16: ...6 Reference Manual 00809 0100 2240 Rev DA Introduction October 2017 Introduction ...
Page 28: ...18 Reference Manual 00809 0100 2240 Rev DA Overview October 2017 Overview ...
Page 192: ...182 Reference Manual 00809 0100 2240 Rev DA Index October 2017 Index ...
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