43
Reference Manual
00809-0100-2240, Rev DA
October 2017
4.4.11
Temperature element and Water Level Sensor wiring
The Rosemount 2240S is compatible with multiple element Resistance Temperature Detectors (RTDs). A
Rosemount 2240S can connect up to sixteen 3- or 4-wire temperature spot elements.
Three connection types are supported: 3-wire with common return, 3-wire individual spot, and 4-wire
individual spot. The Rosemount 2240S is also compatible with averaging sensor types. A maximum of 16
elements can be connected to a Rosemount 2240S transmitter.
The Rosemount 2240S is also equipped with a Sensorbus terminal for connection of a Water Level
Sensor.
Note
If an averaging temperature detector is connected to the Rosemount 2240S, a DIP switch must be set,
see
for more information.
When a Rosemount 2240S transmitter is mounted on top of a MST/WLS, the sensor wires will enter the
terminal compartment through the sleeve at the bottom of the Rosemount 2240S housing.
In case a Rosemount 2240S is mounted on a pipe or a wall (see
“Mechanical installation” on page 30
sleeve and nut can be replaced by an M32 cable gland, see
There are three wiring types that can be used for temperature elements connected to a
Rosemount 2240S. The number of elements that can be connected varies depending on the type of
temperature sensor that is used as illustrated in
Table 4-2. Number of Temperature Elements for Various Temperature Sensors and Wiring Types
Rosemount Tank Gauging System Data Sheet
for more information on various Multiple Spot
Temperature Sensors.
Note
Temperature elements must be connected in the order 1, 2, 3 etc. without any gaps (e.g 10 elements
must be connected to channel 1-10).
Note
Use terminals “b”, “c”, and “d” for 3-wire connections.
Multiple Spot
Temperature Sensor
3-wire
common return
3-wire
individual
4-wire
individual
Rosemount 565
1-16 elements
1-16 elements
1-16 elements
Rosemount 566
1-16 elements
1-16 elements
1-16 elements
Rosemount 765
1-16 elements
1-14 elements
1-10 elements
Summary of Contents for Rosemount 2240S
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Page 10: ...viii Reference Manual 00809 0100 2240 Rev DA Title Page October 2017 Title Page ...
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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