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PRODUCT INSTALLATION MANUAL
DOCT-B3K7
P
15
21
AGE
OF
Figure 5 – Self-Powered Transmitters (4-wire)
A
B
4-20mA
C
Common
Power
Field Terminal
Transmitter
Shield
Supply
Block (TB1)
(4-wire)
The HPTB has one common plane for Channels 1-16 and a second for Channels 17-32. Unless the
transmitter has galvanic isolation between its output and power supply the analog loop from the transmitter
will link the HPTB common to the transmitter power supply common.
Pepperl+Fuchs recommends that all shield drain wires be connected from as close to TB1 as possible to
the nearest grounding point and this point be linked to earth by as short a route as possible.
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