Procedure - Landis+Gyr ZMQ202 User Manual

Communication
interface
Additional power
supply
Inputs and outputs
Serial interface
4.2.3

Procedure

Danger
Danger
H 71 0200 0215 f en - ZMQ202 / ZFQ202 - User Manual
Installation / De-installation
Depending on the communication unit type, the number of RJ-12
connectors can vary. When spring clamp connectors are available they are
not used. B4 and M4 have additional spring clamp connectors that are not
used. The RJ-12 connectors are located on the communication unit.
Communication between the meter and the central station can be achieved
via a PSTN modem, RS485 interface, or RS232 interface.
The four spring clamp connectors on the left provide connection for the
Additional power supply .
The five spring clamp connectors on the right of the additional power
supply provide connection for Tariff control inputs . If the meter is
shipped without external tariff control, these terminals will not be labelled.
The three spring clamp connectors on the right of the tariff control inputs is
the Synchronisation input .
The two spring clamp connectors on the right of the synchronisation input
is the Alarm contact .
The two RJ-12 connectors are located on the power supply board, and
provide local serial RS485 connection of other meters (daisy chain). They
are connected in parallel so that the use of a T-piece is not necessary.
Dangerous voltage on conductors
Dangerous voltage is present on the conductors that the meter is to be
connected to.
Contact with the conductors when under voltage will result in severe
personal injury or death.
The conductors must not be under voltage when connecting or
disconnecting the meter.
Installation and de-installation of the meter must only be performed by
qualified meter installers, with strict adherence to the utility's safety
regulations.
Dangerous voltage on current transformers
Dangerous voltage is produced by the current transformers when the
secondary circuit is broken while current is flowing in the primary.
Contact with the transformers when under voltage will result in severe
personal injury or death. The high voltage produced will destroy the
transformers.
The current transformer secondary circuit must be short-circuited before
de-installing the meter. Installation and de-installation of the meter must
only be performed by qualified meter installers, with strict adherence to the
utility's safety regulations.
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