Siemens SIMATIC IPC677E Operating Instructions Manual page 112

Technical specifications
8.2 General technical specifications
Noise emission
Quality assurance
Degree of pollution
Transient overvoltages
The device must only be connected to a 24 V DC power supply which meets the require-
1
ments of safe extra-low voltage (SELV) according to IEC/EN/DIN EN/UL 601010-2-201. A
protective conductor must also be used (see chapter "Connecting the 24 VDC power
supply (Page 50)").
112
< 55 dB(A) according to EN ISO 7779
In accordance with ISO 9001
Device is designed for environments with pollution degree 2
Device is designed for connection to supply with overvoltage
category II (transient overvoltages up to 2500 V)
Operating Instructions, 04/2019, A5E45117996-AA
SIMATIC IPC677E