Flexim FLUXUS G800, Руководство пользователя

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6 Installation of FLUXUS G800 FLUXUS G80x
UMFLUXUS_G8V4-6-1EN, 2018-10-10 37
6.7.1 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 18.
Recommended configuration of the alarm output
If the transmitter is disconnected from the power supply, the binary output indicates an alarm state.
Tab. 7: Circuit of the current output Ex ib
output transmitter external circuit remark
internal circuit connection
passive current loop
Ex ib
G800C24
G800LC24
I1: 2 (+)
I1: 1 (-)
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)
G800C24
G800LC24
B1: 6 (+)
B1: 5 (-)
U
i
= 28.2 V, P
i
= 0.76 W
U
ext
= 5...28.2 V
R
c
[k Ω ] = 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 amperemeter/voltmeter).
func (switching condition) ERROR
type
(holding behavior)
HOLD (NON-HOLD)
mode
(switching function)
NC CONT.
mA
U
ext
+
+
-
R
c
U
ext
Ref
+
-