Communication; Optical Interface; Communication Units - Landis+Gyr E650 Series User Manual

26/84
2.7

Communication

2.7.1

Optical interface

2.7.2

Communication units

© Landis+Gyr
Number Event
211 Control input 1 set
212 Control input 1 reset
The ZMD300xT meters have an optical interface for local communication
via a readout head, and a wide range of communication interfaces which
can be inserted in the meter.
The optical interface to IEC 62056-21 is a serial, bi-directional interface. It
is situated at top right on the main faceplate (also see section 3
"Mechanical construction") and serves:

For automatic local data recording by means of a suitable acquisition
unit (hand-held terminal) (see section 5.7 "Data readout")

For performing service functions, e.g. to input formatted commands
(see section 5.8 "Input of formatted commands")

As "optical button", i.e. as receiver of a light signal, e.g. generated by a
flashlight acting like the "down" display button (also see section 5.2.2
"Control of display via optical interface")

For communication with a Landis+Gyr .MAP110 Service Tool or a
Landis+Gyr MAP120 Parameterisation Tool.
The communication units which can be inserted in the meter can be used:

For remote reading and for remote tariff control of meters (RS232,
RS485, CS, M-Bus, PSTN modem, GSM modem, GPRS modem,
Ethernet, etc.) or

For recording metering pulses for other physical media, such as
water, gas or heat (S0 interface).
Access via the communication interfaces is protected for specific access
levels using the meter security system by means of passwords. If the
monitoring is activated by corresponding parameterisation, communication
is inhibited for a selected time (max. 24 h) after a selected number of
password attempts with an incorrect password (max. 15). Monitoring takes
place independent of all access levels with password protection and for the
IEC W5 password.
The communication devices are accommodated in an easily exchanged
communication unit, which is plugged in behind the front door of the meter
and secured by a factory seal (also see section 3 "Mechanical
construction"). It can be fitted and removed at any time in the field without
touching the certification seal. Landis+Gyr recommend exchanging
communication units only if the meter is separated from the network and
switched off.
An initial fitting as well as retrofitting without re-parameterisation of the
meters is possible with any version of communication unit. For fitting and
removal of the already parameterised communication units, the installation
personnel do not require any special knowledge of communications.
D000030108 en m – E650 Series 3 – ZMD300AT/CT – User Manual
Device description
Entry in dedicated
event log possible