Siemens SIMATIC IPC677E - Page 112

Technical specifications
8.2 General technical specifications
SIMATIC IPC677E
112 Operating Instructions, 04/2019, A5E45117996-AA
Noise emission
< 55 dB(A) according to EN ISO 7779
Quality assurance
In accordance with ISO 9001
Degree of pollution
Device is designed for environments with pollution degree 2
Transient overvoltages Device is designed for connection to supply with overvoltage
category II (transient overvoltages up to 2500 V)
1
The device must only be connected to a 24
V DC power supply which meets the require-
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)").