Siemens SIMATIC IPC BX-39A - Page 75

Technical specifications
8.2 General technical specifications
SIMATIC IPC BX-39A
Operating Instructions, 07/2022, A5E50715883-AA
75
Safety
Protection class
Protection class I to IEC 61140
Degree of pollution
Device is designed for environments with pollution degree 2
Transient overvoltages
Device is designed for connection to supply with overvoltage cat-
egory II (transient overvoltages up to 2500 V)
Safety specifications
• IEC 61010-2-201
• EN 61010-2-201
• DIN EN 61010-2-201
• UL 61010-2-201
• CSA C22.2 No 61010-2-201
1
The device may only be connected to a 24 V DC power supply which meets the require-
ments of a safe extra
-low voltage (SELV/PELV) in accordance with the standard
IEC/UL/EN/DIN EN 61010
-2-201. The power supply must fulfill the requirements of NEC
Class 2 or L
imited Energy according to IEC/UL/EN/DIN EN 61010-2-201 (see section "Con-
necting the 24
V DC power supply (Page 40)").
If the device is installed in an
enclosure that complies with section 9.3.2. c) of
IEC/UL/EN/DIN
-EN 61010-1 and IEC/UL/EN/DIN-EN 61010-2-201, it can be supplied from a
source "higher than NEC Class 2 / Limited Energy". The device is then classified as "OPEN
EQUIPMENT".
2
not evaluated by UL