Module Installation (Fig. Ii); Communication; Communication Via Radio - Diehl Metering 548 Manual De Instalación

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The relevant ESD regulations (electrostatic discharge) must be
observed.
No liability is accepted for damage (especially to electronic cir-
cuits) resulting from failure to comply with the ESD regulations.

7.1 Module installation (Fig. II)

1. Open the calculator by releasing the side catches.
2. Lock the module into the appropriate slot and carefully connect the
pre-formed ribbon cable at both ends.
3. Close the lid and check the meter for correct operation by pressing the
push button. Renew the seal of the housing lid if the meter functions
correctly.

7.2 Communication

The calculator supports three communications channels.
With wireless operation, two additional communication modules can be
used, whereby the radio telegram has to have the same content as mod-
ule 2 (e.g. two M-Bus modules). The protocol of the two channels can
be different for both ports and is preset at factory, whereby protocol 2
is identical to the radio telegram. Customer specific requirements can be
defined by using the IZAR@SET Software.
Each port has its own primary address. Both ports have a common sec-
ondary address, which is set to the serial number ex works.

7.2.1 Communication via radio

The integrated radio module is an interface for communication with Diehl
Metering radio receivers.
Unidirectional communication has the following specification:
ƒ
The module sends every 8 ... 256 s (variable, send period 0.1 % duty
cycle (min. 8 s); depending on protocol length and programming)
ƒ
The radio module always accesses the current meter registers
ƒ
Transmission frequency: 868 MHz or 434 MHz
ƒ
Various Hydrometer receivers are available for receiving the protocol
(e.g. Bluetooth, GPRS, LAN, ...)
ƒ
The protocol corresponds to the"Open Metering" or "DM Standard" and
is encrypted
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