II - DCE FEL ČVUT v Praze

Safety Standards, FM Approval
Safety standards
used
B-2
The following safety standards apply to all EX modules:
EN50014 (1977 + A1 .. A5):
Electrical equipment for hazardous locations:
General specifications.
EN50020 (1977 + A1.. A5):
Electrical equipment for hazardous locations:
Intrinsic safety ”i”.
DIN EN 61010 (Teil 1 v. 3/94):
Section 6.3.1 and Appendix D.2 Table D.6
Safety requirements for electrical measuring, control and laboratory
equipment.
DIN EN 61131 (Teil 2 v. 5/95):
Programmable logic controllers, operational equipment requirements and
testing.
DIN EN 60204 (Teil 1 v. 6/93):
Electrical equipment of machines:
General requirements.
The designations of safety characteristic values have been adapted in the
course of harmonization of the standards EN50012 .. EN50020. The most
important characteristic data for the relevant operational equipment are
assigned as follows:
Uo, Umax, Ua Uo Maximum output voltage
Io, Ia, Ik Io Maximum output current
Um Um Maximum r.m.s. power-frequency
voltage or maximum direct voltage
Co, Ca Co Maximum external capacitance
Lo, La Lo Maximum external inductance
P, Pmax Po Maximum output power
C, Ci Ci Maximum internal capacitance
L, Li Li Maximum internal inductance
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04