Burkert Type 8643 - Manual (Page 18)

18
Installation
insTAllATion 7.
safety instructions 7.1.
DAngeR!
hazardous if used in explosion-risk area
risk of explosion from electrical voltage!
The Power I/O Box Type 8643 is designed as ignition protection type Ex-e (increased safety).
Before working on non-intrinsically safe circuits of the Power I/O Box Type 8643, always switch off the •
operating voltage of the system!
Danger of explosion due to internal charging of the power i/o Box type 8643!
When the power supply to the Power I/O Box Type 8643 is switched off, the internally stored charge will not
be completely dissipated for 4 minutes. To prevent an explosion, switch off the power supply before connecting
or disconnecting Ex-e terminals.
Do not remove the cover from the connection terminals for Ex-e switching circuits until the connected Ex-e •
circuits have been disconnected from the power supply for longer than 4 minutes.
If using the 2-wire version in potentially explosive areas, do not connect any cable to the Power 24 V supply •
terminals!
Danger of explosion if the allowable ambient temperature ranges are exceeded!
Observe the respective ambient temperature range which is based on the type designation •
(e.g. 8643-2-AL-KS-F-I/O), according to the table in the EC-Type Examination Certificate
(see Appendix / Type Examination Certificate).
Danger of explosion due to unauthorized combination of the ignition protection types!
Due to unauthorized combination of the ignition protection types, the device is not suitable for use in the
explosion-protected area. If the device is nevertheless used in this area, there is a danger of explosion!
If the bus supply of the 4-wire version of the device was operated once in ignition protection type of •
increased safety (e), the bus supply may no longer be intrinsically safe in the ignition protection type (i).
WARnIng!
risk of injury from improper installation!
Installation may be carried out by authorized technicians only and with the appropriate tools! •
Observe the national regulations which apply to the installation/operation of electrical equipment in areas •
where there is a risk of explosions!
risk of injury from unintentional activation of the system and an uncontrolled restart!
Secure system from unintentional activation. •
Following assembly, ensure a controlled restart. •
english
Type 8643 PA