Safety Notes
6
230230 / 947160310010
2019-03-08·BA00·III·en·01
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Digital Input Output Module NAMUR
for Ex n Zone 2
Series 9471/35
• Attach the warning sign supplied: "Warning: Do not separate terminals when
energized unless location is known to be non hazardous" near to the terminals.
• It is only permissible to insert or remove pluggable terminals for non-intrinsically
safe electrical circuits when these are de-energised or if it can be guaranteed that an
explosive atmosphere is not present (hot work permit, gas warning device or in the
case of installation in a non-Ex area).
• When used in Zone 2 or Zone 22, the device is to be installed in a protective enclosure
or in a cabinet that offers a suitable degree of protection in accordance with
IEC/EN 60079-0.
• An enclosure with at least an IP54 protection rating is required for use in Zone 2 and
in safe areas.
• An enclosure with at least an IP64 protection rating is required for use in Zone 22.
• For use in a safe area, install the device in an environment with a degree of pollution
of 1 or 2 (IEC/EN 60664-1) and an overvoltage category of I, II or III.
• The module may only be mounted in a vertical or horizontal position on the
9494 BusRail.
• Modules with intrinsically safe and non-intrinsically safe field circuits may be operated
simultaneously on one BusRail. In this case, a distance of 50 mm must be maintained
between the terminals with intrinsically safe and those with non-intrinsically safe field
circuits. (e.g. partition 220101 or empty space).
Commissioning, maintenance, repair
• Only have commissioning and repairs performed by qualified and authorised persons
(see chapter "Personnel qualification").
• Before commissioning, make sure that the device is not damaged.
• Perform only maintenance work described in these operating instructions.
• Always clean the device with a damp cloth to prevent electrostatic charge.
3.4
Modifications and Alterations
DANGER
Explosion hazard due to modifications and alterations to the device!
Non-compliance results in severe or fatal injuries.
• Do not modify or alter the device.
No liability or warranty for damage resulting from modifications and
alterations.
