EN
Make sure that no moisture can penetrate into the device! The seals and sealing
surfaces must not get dirty; this is because any contamination may, depending on
the particular application or location, lead to a reduction in the level of protection
and hence to failure of the device or irreparable damage to the device!
5. HART communication
An additional signal complying with the HART
logue output signal. Configuration of the device can be carried out with the aid of a
®
HART
communication device. We would recommend our CIS 150 programming kit
(available as an accessory) for this purpose.
In order to ensure trouble-free operation, the following specifications should be taken into
account:
Maximum length of cable between measuring instrument and supply unit:
6
65
10
L
max
R
C
V
V
where L
: maximum length of the cable in [m]
max
R
: resistance of the cable together with
V
the load resistance in []
C
: capacitance of the cable in [pF/m]
V
Resistance R:
U
12
R
, 0
024
where U:
supply in [V
The resistance must be at least 250 .
3
40
10
C
V
]
DC
®
specification is superposed on the ana-