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The interfaces RS 485-0, RS 485-1 and RS 485-2 are basically equal and can be
set for all possible connections. However, there are minor differences. These are
taken into account in the recommended connections and make it easier to connect
the recommended devices or the PC if they are followed.
Notice
Please use the connections as recommended below. If connections are
used differently additional, extensive settings may become necessary.
Recommended connections at the digital outputs.
RS 485-0
USM
Proto-
RMGView
col,
(service)
device
no parameterizable
fea-
byte
tures
sequence for
data types Long
and Float
RS 485-1
IGM-protocol
DZU-protocol
ERZ2000,
ERZ2400,
ERZ2000-NG,
ERZ2000-DI
no parameterizable
byte
sequence for
data types Long
and Float
Manual USM GT400 · EN10 · May 2021
8 Installation
RS 485-2
Instanz-F
nd
2
ERZ ,
Flow computer
other suppliers
Modbus-Master, can
handle IGM- and
DZU-protocol, too,
parameterizable
byte sequence for
data types Long and
Float
109
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