Function
17/30
D000011142 en k – E65C CU-B1, B2, B4 – User Manual
© Gyr
4.4
Application of interfaces
RS2
3
2
Meter with
CU-B1/B4
RS4
8
5
ISDN / PSTN / GSM
METCOM etc.
Application 1
Modem
permanent connection
for remote reading
Fig. 12 Example of an application of CU-B1 or B4
In this application the meter is permanently connected to the telephone
network via its RS232 interface and the modem connected.
Application 2
etc.
ISDN / PSTN / GSM
METCOM etc.
Modem
permanent connection
for remote reading
RS
2
3
2
Meter with
CU-B1/B4
RS4
8
5
RS
4
8
5
Meter with
CU-B2
RS
4
8
5
Meter with
CU-B2
RS
4
8
5
RS4
8
5
Fig. 13 Example of an application of CU-B1/B4 as master together with CU-B2 as
slaves
This application permits several (up to 31) ZxDxxxAT/CT meters to be con-
nected with one communication unit CU-B2 as slaves to one meter with
communication unit CU-B1 or CU-B4 as master. The two terminals of the
RS485 interface are looped internally (see also Fig. 6) and serve as con-
nections from one meter to the next as shown above.
Communication with all meters takes place via the master, i.e. via its
RS232 interface. This can be connected by the user to a PC or laptop to
perform temporary operations such as service functions or re-parametriz-
ation. It serves on the other hand as fixed connection to a communication
network via an ISDN, PSTN, GSM modem, etc.
Single application
Multiple application
