Rosemount 2240S, Справочное руководство, Страница: 39 / 100

Reference Manual
300550en, Rev AA
December 2010
4-13
Rosemount 2240S
Section 4. 2240S Installation
4.4.10 Temperature
Element Wiring
The Rosemount 2240S is compatible with multiple element Resistance
Temperature Detectors (RTDs). 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 2240S is also compatible with
averaging sensor types. A maximum of 16 elements can be connected to the
Rosemount 2240S transmitter.
NOTE!
If an averaging temperature detector is connected to the Rosemount 2240S, a
DIP switch must be set, see “DIP Switches” on page 5-13 for more
information.
When the 2240S transmitter is mounted on top of the MST/WLS, the sensor
wires will enter the terminal compartment through the sleeve at the bottom of
the 2240S housing.
In case the 2240S is mounted on a pipe or a wall (see “Mechanical
Installation” on page 4-3), the sleeve and nut can be replaced by an M32
cable gland, see Figure 2-2 on page 2-2.
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
illustrted in Table 4-2:
Table 4-2. Number of
temperature elements for
various temperature sensors
and wiring types
See the Raptor Technical Description (Document No. 704010en) for more
information on various Multiple Spot Temperature Sensors.
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 1-6 elements 1-4 elements
Rosemount 765 1-16 elements 1-14 elements 1-10 elements