Flexim FLUXUS F704**-A2 Series, Руководство пользователя

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7 Connection FLUXUS F70x
UMFLUXUS_F7V4-6-2EN, 2017-10-01 81
7.5.1 Temperature Input
The temperature probes Pt100/Pt1000 (4-wire) can be connected to the inputs of the transmitter (optional) (see section
7.2). For the assignment and the activation of the temperature inputs see chapter 17.
7.5.2 Current Input
An active or a passive current source can be connected to the current inputs of the transmitter (active current source: with
own power supply, passive current source: with external power supply).
For the connection of an active current source see section 7.5.2.1.
For the connection of a passive current source see section 7.5.2.2.
7.5.2.1 Connection of an Active Current Source
FLUXUS F704, FLUXUS F705, F706
For the connection of the input cable to the transmitter see box Cable connection S. 75, Fig. 7.1 or Fig. 7.2, Fig. 7.42 or
Fig. 7.43 and Tab. 7.20.
FLUXUS F709
• Prepare the input cable.
• Connect the input cable to the terminals of the transmitter (see Fig. 7.4, Fig. 7.44 and Tab. 7.20).
If the polarity of the current source is inversed, only the sign of the measured current will change. For the assignment and
the activation of the current input, see chapter 17.
7.5.2.2 Connection of a Passive Current Source
FLUXUS F704, FLUXUS F705, FLUXUS F706
For the connection of the input cable to the transmitter see box Cable connection S. 75, Fig. 7.1 or Fig. 7.2, Fig. 7.42 or
Fig. 7.43 and Tab. 7.21.
Attention! The terminals Txa and Txb must not be connected.
Tab. 7.20: Connection of an active current source
input transmitter external circuit comments
internal circuit connection
current input
TxA
TxB
Txb (not connected)
max. permanent
overcurrent: 100 mA
Attention! The terminals Txa and TxB must not be connected.
Attention! Observe the correct polarity in order to avoid damaging the current source. A permanent short circuit
can lead to the destruction of the current input.
-
+
V
R
i
+
-
+
-