Connecting The Transmitter - Siemens SITRANS P300 Operating Instructions Manual

Connecting

5.2 Connecting the transmitter

Note
To improve the reliability:
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5.2 Connecting the transmitter
Requirement
Figure 5-1
(1)
(2A)
(2B)
Note
The following values can be set for the load:
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5-2
Install the signal cable separately from cables with voltages > 60 V.
Use cable with twisted strands.
Stay away from large electrical systems.
Use shielded cable to guarantee the full specification according to HART.
Connect a load of at least 230 ohms into the signal circuit in sequence in order to guarantee fault-
free HART communication. When using supply isolation for SMART transmitters, for example:
Siemens 7NG4021 a load is already installed in the device.
Connecting
Supply terminals
Shield support with plastic cable gland
Shield on cable gland
230 to 1100 Ω for the HART communicator
230 to 500 Ω for the HART modem
(3) Auxiliary power U
(4) Load
SITRANS P300 with HART communication
Operating Instructions, 06/2005, A5E00359579-02
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