Special Notes Regarding Explosion Protection
The following warning notices are to be posted in the immediate proximity of the product (WAGO I/O System 750/753):
- WARNING – DO NOT REMOVE OR REPLACE FUSED WHILE ENERGIZED!
- WARNING – DO NOT DISCONNECT WHILE ENERGIZED!
- WARNING – ONLY DISCONNECT IN A NON-HAZARDOUS AREA!
Before using the components, check whether the intended application is permitted in accordance with the respective printing. Pay attention to any changes to the printing when replacing components.
The product is open type equipment. As such, the product must only be installed in appropriate enclosures or electrical operation rooms to which the follwing applies:
- Can only be opened using a tool or key.
- Inside pollution degree 1 or 2.
- In operation, internal air temperature within the highest minimum value and lowest maximum value of the permissible surrounding air temperature of all components
- Minimum degree of protection: min. IP54 (acc. to EN/IEC 60529)
- For use in Zone 2 (Gc), compliance with the applicable requirements of the standards EN/IEC/ABNT NBR IEC 60079-0, -11, -15
- For use in Zone 22 (Dc), compliance with the applicable requirements of the standards EN/IEC/ABNT NBR IEC 60079-0, -11, -15 and -31
- For use in mining (Mb), minimum degree of protection IP64 (acc. EN/IEC 60529) and adequate protection acc. EN/IEC/ABNT NBR IEC 60079-0 and -1
- Depending on zoning and device category, correct installation and compliance with requirements must be assessed and certified by a "Notified Body" (ExNB) if necessary!
Explosive atmosphere occurring simultaneously with assembly, installation or repair work must be ruled out. Among other things, these include the following activities:
- Insertion and removal of components
- Connecting or disconnecting from fieldbus, antenna, D-Sub, ETHERNET or USB connections, DVI ports, memory cards, configuration and programming interfaces in general and service interface in particular
- Operating DIP switches, coding switches or potentiometers
- Replacing fuses
Wiring (connecting or disconnecting) of non-intrinsically safe circuits is only permitted in the following cases:
- The circuit is disconnected from the power supply.
- The area is known to be non-hazardous.
Outside the device, suitable measures must be taken so that the rated voltage is not exceeded by more than 40 % due to transient faults (e.g., when powering the field supply).
Product components intended for intrinsically safe applications may only be powered by supply modules which are intended for intrinsically safe applications themselves.
Only field devices whose power supply corresponds to overvoltage category I or II may be connected to these components.