7 Connection
7.3 Outputs
FLUXUS G801
2020-06-26, UMFLUXUS_G801V1-0EN
74
7.3.1
Intrinsically safe current output Ex ib
The current output may be fed with max. 28.2 V DC/0.76 W.
If the transmitter is disconnected from the power supply during the measurement:
• the passive current output continues being powered thanks to an external power supply
• the last measured value is output
In order to check the function of the transmitter:
• the binary output is installed and activated
• the binary output is used as an alarm output
For the installation and activation of the binary output see chapter 13.
Recommended configuration of the alarm output
If the transmitter is disconnected from the power supply, the binary output indicates an alarm state.
Fig. 7.15: Connection of the outputs to the transmitter FLUXUS *801C24
1 – partition
Tab. 7.10
output
transmitter
external circuit
remark
internal circuit
connection
passive current output Ex ib
*801C24
U
i
= 28.2 V, P
i
= 0.76 W
U
ext
= 4…28.2 V
U
ext
> 0.021 A · R
ext
[Ω] + 4 V
example:
U
ext
= 12 V
R
ext
≤ 380 Ω¶
binary output
(open collector)
*801C24
U
i
= 28.2 V, P
i
= 0.76 W
U
ext
= 5…28 V
R
c
[kΩ] = U
ext
/ I
c
[mA]
I
c
= 1…4 mA
R
ext
is the sum of all ohmic resistances in the circuit (e.g., resistance of the conductors, resistance of the ammeter/voltmeter).
func
(switching condition)
ERROR
typ
(holding behavior)
HOLD
(
NON-HOLD
)
mode
(switching function)
NC Cont.
1
intrinsically safe area
not intrinsically safe area
I
I1: 2 (+)
I1: 1 (-)
mA
U
ext
-
+
B1: 6 (+)
B1: 5 (-)
V
R
c
U
ext
-
+
