Table of Contents
Advertisement
Description of Unit
1.7
Communication
1.7.1
Optical Interface
1.7.2
Communication Units
D000030110 d – E650 Series 3 (ZMD400AT/CT, ZFD400AT/CT) – User Manual
The ZMD400xT 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 face plate (see also chapter 3 "Mechani-
cal 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 key", i.e. as receiver of a light signal, e.g. generated by a
flashlight acting like the "down" display key (see also 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 moni-
toring is activated by corresponding parameterisation, communication is in-
hibited for a selected time (max. 24 h) after a selected number of password
attempts with an incorrect password (max. 15). Monitoring takes place in-
dependent 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 utility seal (see also chapter 3 "Mechanical Construc-
tion"). 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. Mod-
ern plug connections ensure a rapid and faultless connection of the com-
munication units.
27/93
© Landis+Gyr AG
Advertisement
Table of Contents
