TECHNICAL DESCRIPTION
MULTICAL
®
61
5512-622 GB/01.2011/Rev. E1
45
11.1.1
Overview of top modules
Type 67-01: RTC, Real Time Clock
The top module consists of real time clock and battery
backup. When the MULTICAL
®
61 calculator top is placed in
the connection bracket, thereby being powered, the top
module transfers current date and time to the calculator.
The top module is recommended for applications where
correct date/time in data loggers as well as time controlled
tariffs is important.
Real time clock and battery backup are included in all other
top modules.
The connection terminals are not used in this module.
Type 67-05: RTC + data hourly data logger
The module has a galvanically separated data port which
functions with the KMP protocol. The data output can be used
for e.g. connection of external communication units or other
hardwired data communication which it is not expedient to
carry out via the optical communication on the meter’s front.
62: DATA (brown) – 63:REQ (white) – 64: GND (green). Use
data cable type 66-99-106 with 9-pole D-sub or type 66-99-
098 with USB connector.
Furthermore the module includes an hourly data logger.
Only current and accumulated data can be read.
Hourly/daily/monthly/yearly data loggers cannot be read
through the data port of top module 67-05.
Type 67-07: RTC + M-Bus
M-Bus can be connected in star, ring and bus topology.
Depending on M-Bus Master and cable length/cross section,
up to 250 meters with primary addressing can be connected,
and even more using secondary addressing.
Cable resistance in network:
<
29 Ohm
Cable capacity in network:
<
180 nF
The connection polarity of terminals 24-25 is unimportant.
This module is only to be used in mains supplied meters.
Unless otherwise stated in the order, the primary address
consists of the last three digits of the customer number, but it
can be changed via the PC program METERTOOL.
