Siemens SIMATIC S7 Functional Safety Manual

Technical specifications
A.1 General technical specifications
S7-1200 Functional Safety Manual
138 Manual, 02/2015, A5E03470344-AA
A.1.9
Protection class
Protection Class II according to EN 61131-2:
● S7-1200 is open equipment and must be enclosed in additional protection as described in
Section 4.1.2: "Guidelines for installing S7-1200 Fail-Safe devices" (Page 80).
● S7-1200 systems including AC power supply or relays which can be connected to AC
voltage achieve Class II when installed in a suitable enclosure.
● S7-1200 systems including only connections to SELV / PELV achieve Class III when
installed in a suitable enclosure.
● You do not require a protective conductor. The S7-1200 has no protective ground
connection.
A.1.10
Degree of protection
● IP20 Mechanical Protection, EN 60529
● Protects against finger contact with high voltage as tested by standard probe. External
protection required for dust, dirt, water and foreign objects of < 12.5mm in diameter.

Siemens SIMATIC S7 Specifications

General

Brand	Siemens
Model	SIMATIC S7
Category	Controller
Language	English