Functions; Overview Of The Interfaces Of The Simatic Cfu Pa - Siemens Simatic CFU Commissioning Manual

Functions

4.1

Overview of the interfaces of the SIMATIC CFU PA

The CFU is an IO device on the higher-level PROFINET IO system.
Interfaces
The CFU PA has the following interfaces:
Interface
Interfaces for bus systems:
PROFINET IO
PROFIBUS PA
Channels (freely configurable: Digital inputs / outputs)
● Channel
● Channel
Power supply PSx
24 V terminal
Connection for ref‐
erence potential
(ground)
Additional information
Section "Technical specifications (Page 127)"
See also
Configuring a PROFIBUS PA field device (offline) (Page 71)
SIMATIC CFU
Commissioning Manual, 07/2018, A5E39252870-AC
Quantity
1 connection
(terminal X5 of the
CFU for a BusAdapter)
8 fieldbus connections
FIELDBUS (FB<n>)
Max. 8 channels
DIQ (DIQ<n>)
configured
as an input
Max. 8 channels
DIQ (DIQ<n>)
configured
as an output
PSx (X80/X81)
6 connections for ref‐
erence potential
(ground) (X82)
Supplementary note
BusAdapter with 2 ports (X1) for redundant connection to
PROFINET IO or forwarding the PROFINET IO.
Redundant connection is possible:
● Media redundancy (MRP)
● Singular system redundancy (S2)
The approved BusAdapter variants for connecting the
CFU to PROFINET IO are listed in section "Article num‐
bers (accessories / spare parts) (Page 145)".
One field device per connection (FB<n>).
Maximum current per connection/channel: 40 mA
● Input voltage: max. 30 V
● Integrated sensor supply
Maximum current per channel: 500 mA
● Signal voltage: max. 30 V
● Maximum current per channel: 500 mA
Note: The parallel connection of the DQ channels is im‐
permissible.
Redundant supply possible
For optional connection of a sensor to ground.
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