12
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documents, including industrial property rights. These documents may only
be used with our express consent in writing, and only to the extent permitted
in any such consent. The documents may not be duplicated or made
available to third parties. In case of violation of the aforementioned
provisions, we reserve all rights.
6 Electrical
connection
6.1 Power supply voltage
- The transmitter type TR must be supplied with 24 V DC, 2-wire technique.
- Terminal voltage 14 to 30 V DC (terminals 1 and 2)
- Recommendation: 2-wire cables, twisted and shielded
(cable diameter 6-12 mm)
- Ground cable shield according to section 16.1
Wiring diagram.
- In order to ensure safe HART
communication, the limits for the
minimum load with R
L
≥
250
Ω
must be observed.
- For the maximum amount of line and load resistance, see diagram below.
The maximum load depends on the supply voltage.
A
V
U
R
V
U
For
A
V
U
R
V
U
For
B
B
B
B
022
.
0
)
5
.
8
(
:
2
.
15
004
.
0
)
14
(
:
2
.
15
−
=
≥
−
=
<
Maximum load
0
200
400
600
800
1000
14
16
18
20
22
24
26
28
30
Supply voltage [V]
Load [ohm]
