IDL 101
STRUCTURE OF THE BUS TOPOLOGY
HB_IDL101_E_V222.doc
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Gantner Instruments Test & Measurement GmbH
IRK
100
RUN
ERR
REPEATER / CONVERTER
SUPPLY
R S 4 8 5 '
Gantner
R S 2 3 2
+
10
..3
0V
0V
A
'
B
'
R
X
T
X
C
O
M
C
O
M
A
B
C
O
M
'
ON OFF
BAUDRATE
0 .. 300
1 .. 1200
2 .. 2400
3 .. 4800
4 .. 9400
5 .. 19200
6 .. 38400
7 .. 93750
0 .. 187500
0 .. 500 k
0
1
2
5
67
89
4
3
R S 4 8 5
ON OFF
ISK
100
RS-485 / RS-232 CONVERTER
Gantner
BUS TERMINATION
ON
OFF
T
R
A
N
S
M
IT
R
E
C
E
IV
E
P
O
W
E
R
Interface Converter ISK 200
Repeater/Converter IRK 100
Figure 4.8 Interface Converters ISK 200 and IRK 100
4.10. Equipotential Bonding
The potential difference between the actual physical voltage potentials (that are allocated to a logic signal status) DGND
of all connections with the bus must not exceed ± 7 Volt. If this cannot be guaranteed, an equipotential bonding has to
be created. For most of the connections this means that the minus connection of the power supply has to be fed-
through as a compensating line from connection to connection.
4.11. Adjustment of Address and Baud Rate
Before a control (PLC) or a computer (PC) can interchange data with a data logger via the bus, address and baud rate
for the data logger have to be defined. The following points have to be taken into consideration in this connection:
All devices have to be adjusted to the same baud rate.
The same address must not appear twice in the bus topology.
The setting variants for the bus parameters for the
Datalogger IDL 101 are:
Bus parameters
ASCII-protocol
PROFIBUS-protocol
MODBUS-protocol
address
1 ..... 127
1 ..... 127
1 ..... 255
2,400 bps
-
2,400 bps
4,800 bps
-
4,800 bps
baud rate
9,600 bps
9.6 kbps
9,600 bps
19,200 bps
19.2 kbps
19,200 bps
38,400 bps
-
38,400 bps
Table 4.3 Setting variants for address and baud rate for the Datalogger IDL 101
If no other specifications are made on delivery, the sensor modules have address 1 and baud rate 19,200 bps as
default. The adjustment can be changed via the bus by means of the
Configuration Software ICP100.
