Siemens SIMATIC S7-400 Reference Manual page 16

General specifications
1.1 Standards, certificates and approvals
APPROVED for Use in
● Cl. 1, Div. 2, GP. A, B, C, D T4A
● Cl. 1, Zone 2, GP. IIC T4
Note the following information.
or cULus Approvals, Hazardous Location for Relay Modules
R
HAZ. LOC.
CULUS Listed E223122 INT. CONT. EQ. FOR HAZ. LOC.
Underwriters Laboratories Inc., complying with
● UL 508 (Industrial Control Equipment)
● CSA C22.2 No. 142 (Process Control Equipment)
● UL 1604 (Hazardous Location)
● CSA-213 (Hazardous Location)
APPROVED for Use in
● Cl. 1, Div. 2, GP. A, B, C, D T4A
● Cl. 1, Zone 2, GP. IIC T4
● Cl. 1, Zone 2, AEx nC IIC T4
Note the following information.
Note
This product must be installed according to the NEC (National Electric Code) stipulations.
When used in environments according to class I, division 2 (see above), S7-400 must be
mounted in an enclosure that corresponds to at least IP54 according to EN 60529.
You can find information about the use of S7-400 in hazardous areas of zone 2 in a separate
document, which is included in this documentation package.
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S7-400 Automation System Module Data
Reference Manual, Ausgabe 11/2016, A5E00850736-08