Burkert Type 8643 - Manual (Page 8)

8
Basic Safety Instructions
BAsiC sAfETy insTruCTions 4.
These safety instructions do not make allowance for any
contingencies and events which may arise during the installation, operation and maintenance of the devices. •
local safety regulations – the operator is responsible for observing these regulations, also with reference to the •
installation personnel.
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 oper- •
ating 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 explo-
sion-risk 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).
general hazardous situations.
To prevent injury, ensure that:
That the system cannot be activated unintentionally. •
Installation and repair work may be carried out by authorized technicians only and with the appropriate tools. •
After an interruption in the power supply or pneumatic supply, ensure that the process is restarted in a •
defined or controlled manner.
The device may be operated only when in perfect condition and in consideration of the operating instructions. •
The general rules of technology apply to application planning and operation of the device. •
english
Type 8643 PA