7 Connection
7.4 Inputs
PIOX R721
2021-09-01, UMPIOX_F72xV1-3EN
42
Connection of a passive current source
For the connection of the input cable to the transmitter see section 7.2.1, Fig. 7.10 and Tab. 7.7.
At full load (20 mA), a voltage of 22.9 V DC is available for the supply of the passive current source.
Important!
The terminals Txa and TxB must not be connected.
Important!
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.
Tab. 7.7:
Connection of a passive current source
input
transmitter
external circuit
remark
internal circuit
connection
current input
max. permanent overcurrent:
100 mA
V
R
int
+
-
TxA
Txb (not connected)
Txb
+
-
