Emerson Rosemount 2240S, Справочное руководство, Страница: 53 / 194

43
Reference Manual
00809-0100-2240, Rev DA
Rosemount
™
2240S Installation
October 2017
Rosemount
™
2240S Installation
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
“DIP Switches” on page 62 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 ), the
sleeve and nut can be replaced by an M32 cable gland, see Figure 2-2 on page 8 .
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 :
Table 4-2. Number of Temperature Elements for Various Temperature Sensors and Wiring Types
See 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