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16
Reference Manual
00809-0100-4840, Rev CB
February 2015
3.4
Electrical installation
3.4.1
Connecting the cable(s) to the transmitter
The Rosemount 3100 Series is a two-wire loop-powered transmitter accepting power supplies
as follows:
The 3101: 12 to 30 Vdc
The 3102: 12 to 40 Vdc
The 3105: 12 to 40 Vdc (non-hazardous), 12 to 30 Vdc (hazardous).
Note
To comply with the CSA approval requirements, the 3101 and the 3102 must be powered from a
Rosemount 3490 Series Control Unit or a class 2 separate extra-low voltage (SELV) source
Other devices may reset if connecting the transmitter to a multi-drop system while the loop is
powered. De-energize the loop to avoid devices being reset
Each transmitter is supplied with two cable entries. A suitable conduit system or cable gland
must be used to maintain the weather-proof rating and hazardous area protection. Any unused
entry must be sealed with a suitably rated blanking plug.
A two-core, shielded/screened cable is required for external power supply and output signal
connections. The cable is not supplied.
Connect the cable(s) to the transmitter
1.
Make sure that the power supply is disconnected.
2.
Undo the three cover screws and then lift the transmitter housing cover.
The cover on the metal housing can rest on the hinge. Place an object under the cover
to avoid the transmitter toppling over.
3.
Pass the cable through the cable gland/conduit.
4.
Connect the cable wires:
a.
For The Rosemount 3101, connect wires according to the section
“Connecting the cable wires to the Rosemount 3101” on page 17
b. For The Rosemount 3102, connect wires according to the section
“Connecting the cable wires to the Rosemount 3102” on page 18
c.
For The Rosemount 3105, connect wires according to the section
“Connecting the cable wires to the Rosemount 3105” on page 19
5.
Connect the cable shield/screen to a suitable ground (earth) at one end only.
6.
Replace the cover, tighten the cable gland, and connect the power supply.
Содержание Rosemount 3101
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