Landis+Gyr CU-B1, Руководство пользователя

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© Gyr D000011142 en k – E65C CU-B1, B2, B4 – User Manual
4 Function
The various interfaces of the communication unit CU-Bx (S0, RS485 and
RS232) are controlled by a microprocessor in the communication unit CU-
Bx, which communicates with the microprocessor of the meter.
4.1 Pulse inputs (S0 interfaces)
The CU-Bx communication unit can receive pulses from external pulse
generators via pulse inputs and record these in the total energy register or,
if provided, in the data profile. The pulse generators must comply with the
conditions of the S0 interface according to IEC 61393 or DIN 43864.
Status "On"
Status "Off" t
T
<
_
5 ms
t
T
t
On
t
Off
> 30 ms
_
> 30 ms
_
0.9 i
0.5 i
0.1 i
Fig. 10 Pulse specification of S0 interface
The pulse inputs use terminals 20 and 21 (S01) or 22 and 23 (S02) of the
left-hand terminals in the communication unit CU-Bx. See also sections
1.2.4 "Connections" and 1.2.5 "Connection diagram".
The pulses from meters connected via the S0 interfaces are each fed to a
total energy register and – in versions with demand recording – to a P run-
ning register. If the meter has a data profile memory, it can also record the
energy status and/or the mean value of demand P running of the external
meters in the data profile.
4.2 RS485 interface
The serial bi-directional RS485 interface is standardised to ISO-8482. The
RS485 interface is based on the principle of a difference signal for trans-
mitter and receiver and permits the connection of several drivers to the
transmission path. Up to 32 transceivers (transmitters/receivers) can be
connected to one line, so that operation is possible as bus or as local semi-
duplex "multipoint" network.
Several closely situated meters can be connected for example via the
RS485 interface of the CU-Bx with a bus system and then connected
centrally to a modem to perform readouts and parameterising.
Depending on the version the RS485 interface supports only the commu-
nication protocol according to IEC 61107 or the communication according
to IEC 61107 and to DLMS.
Application
Protocol