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8 Installation
Connecting a flow computer from third-party manufacturers
112
Flow computers from third-party manufacturers can be connected to RS 485-1 or
RS 485-2 terminals. This interface communicates via a Modbus protocol.
All diagnosis functions can be made available via a configuration of the Modbus.
Flow computers from third-party manufacturers can also be connected to the
terminals Pulse 1 and Pulse 2. When parameterizing, take care that the maximum
possible gas flow rate is assigned to a maximum frequency of 2 kHz. All diagnosis
functions are not available.
1
Connect the flow computer to terminals RS 485-1 (6) or RS 485-2 (7) or
Pulse 1 (4) and 2 (5).
Warning and alarm messages are also available. You also have to connect a
direction contact for bi-directional operation.
2
Connect the terminal Warn (2) for warning messages.
3
Connect the terminal Alarm (3) for alarm messages.
Manual USM GT400 · EN10 · May 2021
1
Terminal connections
2
Connection Warning messages
3
Connection Warning messages
4
Connection Pulse 1
5
Connection Pulse 2
6
Connection RS 485-1
7
Connection RS 485-2
Fig. 8.16: Connection assignment on the terminal strip
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