4
ELECTRICAL CONNECTIONS
18
OPTITEMP TT 53 C/R
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06/2018 - 4006523501 - MA OPTITEMP TT 53 R01 en
4.3 Connection diagram of in-head transmitter
INFORMATION!
To enable HART
®
communication, the output circuit must have an output load of at least 250
Ω
.
Figure 4-1: Connection diagram
1
Voltage supply 8,5
…
36 VDC (terminals 6, 7)
2
HART Modem
3
Input
4
Output
5
Thermocouple
6
Pt100 3-wire connection
INFORMATION!
The HART
®
modem is connected parallel to the output load or parallel to the output of the
transmitter.
INFORMATION!
In order to ensure reliable HART
®
communication with this transmitter, the maximum cable
length of the output circuit must be observed. For detailed information refer to Cable length on
page 22.
