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18
C1, D1, D2 and D3 modules
Modules C1, D1, D2 and D3
are used for data communica-
tion. All these modules are gal-
vanically isolated from flow-
meter circuits. They can be in-
stalled only in position 6 and
their signals are output to termi-
nals 10 and 11. Interface
RS232 is the only exception, as
it needs 3 wires.
C1 – RS232 inter-
face
It is used primarily for
service purposes, be-
cause maximum cable
length from the converter
to a computer is 15 me-
ters and only one con-
verter can be connected
to a single link.
Connection to the com-
puter equipped with RS232 in-
terface is done using an in-
cluded cable. Thread one end
of the cable through a cable
bushing and connect it to 3-pin
connector behind terminals 10-
11. The other end of the cable
is equipped with CANON 9M
connector. This ensures leading
of RS232 interface signals out
of converter box while protec-
tion level IP66 is maintained.
The interface is connected to
the computer using a crosslink
cable Laplink 9F-9F.
D1 – RS485 interface
It is used for permanent con-
nection of multiple converters to
the computer. It enables con-
C1
RS232
D1
RS485 (MODBUS)
D2
0/20mA
data current loop
D3
M-BUS
G1
GSM modem
H1
HART modem
(with A6,7)
1
2
3
4
5
6
7
8
9
CANON 9F
1
2
3
4
5
6
7
8
9
CANON 9M
10 11
C1
RS 232
Fig.RS232 cable connection
necting of up to 31 stations in a
communication network using a
twisted pair link cable with total
length of 1200 meters. Number
of stations and length of cables
can be increased by using re-
peaters. Stations are connected
to the link in parallel. The most
distant ends of line have to be
equipped with terminating resis-
tors 120
Ω
.
When setting stations, be
sure to set the same baud rate
for all of them and to set a
unique address for each of
them. MASTER address is al-
ways set to “0” and addresses
of individual stations can be set
in range 1-254.
D2 – Data current loop
interface 0/20 mA
It is used for permanent con-
nection of multiple converters to
the computer. It enables con-
necting of multiple stations on
long distances. Data transfer
via current coding 0/20 mA is
highly resistant against interfer-
ence and is suitable for indus-
Fig. RS485 network connection
Fig.Data current loop 0/20 mA
network connection
trial environment. Individual sta-
tions are connected in series.
Disadvantage of this configura-
tion is that if one station fails,
then whole network breaks
down.
D3 – M-BUS interface
Standard M-Bus (Meter-Bus)
is designed for applications of
data acquisition from various
media consumption meters. It
enables connecting of many
devices (hundreds of them) on
distance of several kilometers.
Fig. M-Bus network connection
Fig. Communication module menu
M-BUS
DEVICE
1
DEVICE
2
DEVICE
3
M-BUS
M-BUS
M-BUS
MASTER
10 11 10 11 10 11
6.RS232
─►
Baudrate
─►
○
300 Bd
○
600 Bd
○
1200 Bd
○
2400 Bd
○
4800 Bd
●
9600 Bd
○
19200 Bd
○
38400 Bd
○
57600 Bd
○
76800 Bd
○
115200 Bd
Adress
─►
»Ow n adress
Protocol
─►
●
FLOMAG
○
M-BUS
○
MODBUS-RTU
○
MODBUS-ASCII
○
HART
Parity
─►
●
No parity
○
Odd parity
○
Even parity
Word order
─►
●
Low w ord first
○
High w ord first