WIKA TIF50 Betriebsanleitung Seite 22

7. Electrical connection
The connected wires must be checked to ensure they are connected properly. Only
well-secured wires can guarantee a fault-free operation.
User interface
EN
7.3 HART ® signal
The HART signal is measured directly via the 4 ... 20 mA signal line. The measuring circuit
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must have a load of at least 250 Ω. However, the load must not be too high, as otherwise,
in the case of relatively high currents, the terminal voltage at the transmitter will be too low.
For that reason, connect the cable clamps of the modem and/or the HART
as described (see chapter 6.4 "HART
tion connectors of a power supply/line transformer. The connection of the HART
and/or the HART
HART communicator may also be connected parallel to the resistor! When connecting
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an Ex-version of the transmitter, observe the special conditions for safe use (see chapter 9
"Information on mounting and operation in hazardous areas").
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communicator is not dependant on polarity! The HART
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Status data
Unit line, info line
Measured value
Bar graph
Operating keys
configuration tree") or use the existing communica-
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WIKA operating instructions models TIF50, TIF52
communicator,
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modem
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modem or the
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