Communication; Optical Interface; Communication Units - Landis+Gyr E650 Series 4 User Manual

Device description
2.8

Communication

2.8.1

Optical interface

2.8.2

Communication units

D000062026 en a – E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
Number Event
230 Undervoltage L3 (above threshold 2)
231 Undervoltage L1 (below threshold 3)
232 Undervoltage L2 (below threshold 3)
233 Undervoltage L3 (below threshold 3)
234 Undervoltage L1 (above threshold 3)
235 Undervoltage L2 (above threshold 3)
236 Undervoltage L3 (above threshold 3)
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 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 display "down" 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 utility 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.
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