H-System – Isolated Barriers and Termination Boards for HIMA
Technical Specifications
20
16-11
33
6.1.2
Conformity
General
• Isolated barriers with explosion protection, preferably Ex ia IIC/Class I, Div. 1,
international approvals
• EMV according to
• EN 61326-1
• EN 61326-3-2, only for devices with SIL rating, where the data sheet
mentions this standard.
If you operate the device with a DC supply voltage, you must ensure that
the bridging of the 20 ms voltage interruption is realized by the power
supply.
• NAMUR NE21
If you operate the device with a DC supply voltage, you must ensure that
the bridging of the 20 ms voltage interruption is realized by the power
supply.
• LEDs according to NAMUR NE44
• Software according to NAMUR NE53
Digital Inputs and Outputs according to NAMUR
The standards references for this interface have changed many times:
• German standard (old):
DIN 19234
: Electrical distance sensors
–
DC interface for distance sensors and switch amplifiers; 1990-06
• European standard (old):
EN 50227
: Low voltage switch gear and control gear
–
control devices and switching elements
–
proximity switches, DC interface
for proximity sensors and switch amplifiers (NAMUR), 1996-10
• German version (old):
DIN EN 50227
: Low voltage switch gear
–
control
devices and switching elements
–
proximity switches, DC interface for
proximity sensors and switch amplifiers (NAMUR), 1997
•
Current designation: EN 60947-5-6
: Low voltage switch gear
–
control
devices and switching elements
–
proximity switches, DC interface for
proximity sensors and switch amplifiers (NAMUR), 2000
•
Current IEC designation: IEC 60947-5-6
: Low voltage switch gear and
control gear
–
part 5-6: Control devices and switching elements
–
DC interface
for proximity sensors and switch amplifiers (NAMUR), 1999
