230230 / 947160310010
2019-03-08·BA00·III·en·01
Function and Device Design
7
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Digital Input Output Module NAMUR
for Ex n Zone 2
Series 9471/35
4
Function and Device Design
4.1
Function
Application range
When installed in a corresponding suitable field enclosure, the digital input output module
NAMUR series 9471/35 is permitted for use in hazardous areas where gas or dust are
present in Zone 2 and Zone 22 or in safe areas.
Mode of operation
The digital input output module NAMUR series 9471/35 can connect up to
16 non-intrinsically safe digital signals to the IS1+ remote I/O system. All channels can
be configured as input for NAMUR proximity switches (EN 60947-5-6), 3-conductor PNP
proximity switches with external supply, for passive/active 24-V contacts and as output
for connection of low power solenoid valves (with adjustable parameters). Up to 8 inputs
can be used as frequency inputs or as counters up to 20 kHz. In the "rotation direction
recognition" and "forward/backward counter" operating modes, up to 4 inputs can be
used. All inputs and outputs are monitored for short circuiting and line breakage.
DANGER
Explosion hazard due to improper use!
Non-compliance results in severe or fatal injuries.
• Use the device only in accordance with the operating conditions
described in these operating instructions.
• Use the device only for the intended purpose specified in these
operating instructions.
Function-compatible replacement for IS1 I/O modules: Series 9470/25 and
9471/15.
