G
6 DTR. LI-24
(ENG
)
0
250
500
750
1000
10
15
20
25
30
35
40
45
Ro[ ]
Vm
in
[
V
]
Umax. Ex
5.5.3. LI-24 connecting at danger area.
Hazardous area
Safe area
Aplisens KAP-03Ex Communicator
In hazardous areas, connections
to the control terminals must be
made using only instruments which
are permitted to be used in such areas
Milliammeter
mA
.
3
2
VWX
MNO
DEF
YZ#
5
6
PQR
*
+/
9
GHI
8
0
@%&
1
4
JKL
7
STU
ABC
RE
F2
PV
F4
F3
F4
PF
F1
Ro
a Ex power supply
see p.5.
_
+
LI-24
RTD, Thermocouple
Electrical isolation
www.
aplisens.pl
Hazardous area
Safe area
Fig.5. Connecting transmitter circuit
– sensors connecting according to p.7.
6. TECHNICAL PARAMETERS.
6.1. Electrical parameters:
- Input signal
thermocouple, resistance sensor,
resistance, voltage, with accordance to tables 1 and 2
- Output signal
4...20mA + Bell202/Hart Rev.5.1
- Power supply
14
– 50VDC
- Power supply for intrinsic-safe versions
- in accordance with p.5.
-
Load resistance
Ro =
- Resistance for communication (Hart)
250÷1100
Fig.6. Supply voltage in load resistance (Ro) function for LI-24 transmitter. Safe working area (grid) upper
colour area.
Usup[V]-14V
0,023A
Communicator has to have certificate for connection to
a signal line leading at the danger zone.
Example Aplisens KAP-03Ex.
If such is missing, the transmitter should be configured
and calibrated at a safe zone and communicator can’t
be connected to line entered to danger zone.
Sensors connection as p.7
If the resistance seen from the transmitter to the line
is Ro > 250
is possible communication with the transmitter
via a communicator connection to "DC " and "DC " terminals
as shown on figure. (Ro = line resi load).
If Ro < 250
, there will be no communication and resistance in
the measuring line should be increased to at least 250
,
as shown on figure.