Note
Special conditions
● Measures must be taken to protect against exceeding the rated operating voltage by
transient interference voltages of more than 119 V.
● Device without aluminum housing (type: 6ES7655-5PX31-1XX0):
– The device may only be used in areas with a pollution degree of not more than 2
according to IEC 60664‑1.
– The device must be installed in a suitable enclosure which meets the following
requirements:
The enclosure shall provide a degree of protection of at least IP54 in accordance with
IEC 60079‑7, taking into account the ambient conditions of use.
● Device with aluminum housing (type: 6ES7655-5PX31-1AX0):
– The device provides IP66 degree of protection according to IEC 60079-31.
12.1.2.3 IECEx approval for SIMATIC CFU DIQ (6ES7655-5PX31-1AX0) with and without
aluminum housing (6ES7655-5PX31-1XX0)
Table 12-5 IECEx certification
Certificate number IECEx DEK 18.0086X
Standards
● IEC 60079-0
● IEC 60079-7
● Only 6ES7655-5PX31-1AX0: IEC
60079-31
II 3 G Ex ec IIC T4 Gc Type: 6ES7655-5PX31-1XX0 and
6ES7655-5PX31-1AX0
II 3 D Ex tc IIIC T80 °C Dc Only type: 6ES7655-5PX31-1AX0
Note
Special conditions
● Measures must be taken to protect against exceeding the rated operating voltage by
transient interference voltages of more than 119 V.
● Device without aluminum housing (type: 6ES7655-5PX31-1XX0):
– The device may only be used in areas with a pollution degree of not more than 2
according to IEC 60664‑1.
– The device must be installed in a suitable enclosure which meets the following
requirements:
The enclosure shall provide a degree of protection of at least IP54 in accordance with
IEC 60079‑7, taking into account the ambient conditions of use.
● Device with aluminum housing (type: 6ES7655-5PX31-1AX0):
– The device provides IP66 degree of protection according to IEC 60079‑31.
Technical specifications
12.1 General technical specifications
SIMATIC CFU
156 Commissioning Manual, 08/2019, A5E39252870-AD
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