Flexim PIOX R721 - Page 39

7 Connection
PIOX R721 7.3 Outputs
39
UMPIOX_F72xV1-3EN, 2021-09-01
Tab. 7.5: Output circuits
output transmitter external circuit remark
internal circuit connection
active current output/HART current output
U
int
= 24 V
R
ext
< 500 Ω
HART
U
int
= 24 V
R
ext
< 500 Ω
passive current output/HART current output
U
ext
= 8…30 V
U
ext
> 0.024 A
.
R
ext
[Ω] + 8 V
example:
U
ext
= 30 V
R
ext
≤ 900 Ω
HART
U
ext
= 10…24 V
switchable current output
All switchable current outputs
are jointly switched to active
and passive in the menu item
Outputs.
active current output
U
int
= 15 V
R
ext
< 250 Ω
passive current output
U
ext
= 8...30 V
U
ext
> 0.021 A
.
R
ext
[Ω] + 8 V
example:
U
ext
= 12 V
R
ext
≤ 190 Ω
voltage output R
int
= 500 Ω
R
ext
> 2 MΩ
If R
ext
is smaller, the accuracy
is less than specified.
The number, type and connections of the outputs depend on the order.
R
ext
is the sum of all ohmic resistances in the circuit (e.g., resistance of the conductors, resistance of the ammeter/voltmeter).
+
-
Px+
Px-
+
-
mA
ƒ
G
+
-
U
int
Px+
Px-
ƒ
G
mA
Px+
Px-
mA
U
ext
+
-
ƒ
G
Px+
Px-
ƒ
G
U
ext
mA
-
+
+
-
Px+
Px-
+
-
mA
Px+
Px-
mA
U
ext
+
-
R
int
Px+
Px-
+
-
V