Festo CMMT-ST-C8-1C Series, Руководство пользователя

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36 Festo — CMMT-ST-C8-1C-...-S0 — 2021-04b
Malfunctions
• When cross-wiring configurable inputs/outputs, observe the current rating of the cables and the
mating plugs.
Whether cross-wiring of the diagnostic contact is permissible depends on the required safety classifi-
cation.
The diagnostic contact must be evaluated separately for EC motors with the classification SIL 3, cat.
3, PL e. It is not permissible to cross-wire the diagnostic contact. In all other cases, the following rules
apply when cross-wiring several servo drives:
–
Wire inputs #STO-A and #STO-B in parallel in each case.
–
Wire diagnostic contacts STA-C1/C2 in series in each case.
–
Wire the diagnostic contacts of a maximum of 10 servo drives in series. The maximum cable length
applies to the entire line, from the safety relay unit to the final device.
Example of cross-wiring è Manual Safety sub-function.
Mixed cross-wiring of diagnostic contacts and diagnostic outputs is not recommended.
The connections for the load and logic power supply can be cross-wired to create a device compound.
Twin wire end sleeves or double mating plugs can be used for cross-wiring.
According to the mating plug data sheet, conductor cross sections of maximum 2x 1 mm² per contact
are possible using twin wire end sleeves. With the double mating plug TFKC 2.5/3-ST-5.08 from
Phoenix Contact, conductor cross sections of maximum 2x 1.5 mm² per contact are possible.
Cross-wiring Twin wire end sleeve Double mating plug
TFKC 2.5/3-ST-5.08
Max. conductor cross section
per cable (2) 1 mm² 1.5 mm²
Max. permissible current with
heat-resistant cable 19 A 24 A, according to mating plug
data sheet max. 10 A for cUL
Tab. 39: Max. permissible current
Recommendation:
–
Insert a suitable fuse for line protection. The rated current of the fuse must be less than or equal to
the permissible current rating of the selected conductor cross section.
–
The number of devices that can be cross-wired depends on the current consumption of the devices.
8 Malfunctions
8.1 Diagnostics via LED
The device has LEDs for displaying status information on the top and in the RJ45 bushings [XF1 IN],
[XF2 OUT] and [X18].
The following image shows an example of the LEDs on the front of product variant CMMT-ST-...-EC. The
functions of the RTE network status LEDs
2
differ by product version.