IDL 101
STRUCTURE OF THE BUS TOPOLOGY
30
HB_IDL101_E_V222.doc
Gantner Instruments Test & Measurement GmbH
Figure 4.7 Grounding of the bus line shield at the IDL101
Notice
: The screen must not be connected with the ground (0V) of the power supply!
Notice
: The screen should always be connected to earth with a large surface and low-inductive.
4.9. PC Bus Connection
The bus interface of the sensor module is based on the RS 232 and RS 485 standard. Since most of the hosts are "only"
equipped with RS 232 interfaces, at longer distances between host and data logger an interface converter or a plug-in
board with RS-485 drivers is required for conversion purposes.
Gantner Instruments offers a compact interface converter with integrated mains power supply called ISK 200. Mains
power supply, bus connection and a separate 24 VDC-output are dc decoupled. The interface converter is also
applicable for remote power feeding. Further more the interface converter
ISK 200 offers the opportunity to connect in
addition the necessary bus termination with a switcher. The converter is used as a table device.
Further more the module
IRK 100 is available. This module can be used as a repeater or as a converter. It offers also
the opportunity to connect the necessary bus termination with a switch. The
Repeater/Converter IRK 100 has a snap-on
mounting for installation on standard profile rails (DIN rail) 35 mm (1.4 inch) according to DIN EN 50022.
RS 485 Field Bus
Shield
Insulation
Central
Earthing Point
0
V
A
B
R
X
T
X
C
O
M
S
O
U
R
C
E
A
In
+
A
In
-
RUN
ERR
I/O
0
2
I/O
0
4
+
10
..
3
0
V
RS 232
RS 485
SUPPLY
S
O
U
R
C
E
A
In
+
A
In
-
S
O
U
R
C
E
A
In
+
A
In
-
S
O
U
R
C
E
A
In
+
A
In
-
S
O
U
R
C
E
A
In
+
A
In
-
S
O
U
R
C
E
A
In
+
A
In
-
A
O
ut
+
I/O
1
2
I/O
1
4
I/O
1
6
I/O
1
5
I/
O
0
6
I/O
0
8
I/
O
1
0
I/O
0
1
I/O
0
3
I/
O
1
1
I/O
1
3
I/
O
0
5
I/O
0
7
I/
O
0
9
INTELLIGENT DATA LOGGER
AD
R
A
GN
D
DIGITAL
A
GN
D
A
GN
D
A
GN
D
A
GN
D
A
GN
D
A
GN
D
1
2
3
4
5
6
