Connecting; Hardware-Settings; Wiring Rules - Siemens Simatic CFU Commissioning Manual

Connecting

7.1

Hardware-settings

No hardware settings have to be carried out at the CFU.
Additional information: Restoring the state of delivery (Page 107)
7.2

Wiring rules

8-pin connectors of the CFU
8-pin plugs of a CFU are slot-coded. The coding prevents an incorrect placement, for example,
when replacing the CFU.
TWIN wire end ferrules for the wires
Due to the space required by TWIN wire end ferrules with 0.75 mm
ensure a correct angle for the conductor arrangement when crimping the TWIN wire end ferrule
so that the wires are optimally arranged.
Note
CFU PA: Connecting field devices to FB<n>
Observe section "Connecting a PROFIBUS PA field device (Page 41)"
Rules for current consumption and power loss of a CFU
The power loss of all utilized components in an enclosure must not exceed the maximum power
that can be dissipated in the enclosure.
Tip:
When sizing the enclosure, ensure there is always sufficient heat dissipation (even at high
outside temperatures).
● You can find additional information in section "Mechanical and climatic ambient conditions
for operation (Page 134)".
● You can find information on current consumption and power loss of the CFU in section
"Technical specifications of the Compact Field Unit PA (Page 138)".
SIMATIC CFU
Commissioning Manual, 07/2018, A5E39252870-AC
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