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8024252/AE00/V1-0/2020-07| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-D
Subject to change without notice
5
INSTALLATION
Special safety instructions
●
SICK AG recommends a tightening torque of 0.5 Nm for the screws of the screw
terminals (
see “Control unit electrical connections”, page 35
●
The supplied control unit is completely wired. Do not change or manipulate this control
unit. Observe the wiring diagram when connecting the control unit.
●
Make sure the external grounding connections are present, in good condition, and not
damaged or corroded.
●
Observe the maximum possible conductor lengths in order to minimize power
dissipation.
WARNING:
Danger of electrical accidents
Incorrect performance of electrical work could result in serious electrical accidents.
▸
Electrical work on the device may only be carried out by electricians familiar with the
possible dangers.
NOTICE:
Device damage through short-circuit on the device
The internal electronics can be damaged when signal connections are established and
the power supply is switched on.
▸
Only carry out work on the device when the power supply is switched off.
DANGER:
Danger of explosion and expiration of the Ex-approval for the device, when
using cable inlets and closures on the probe junction unit that are not
approved for operation in explosive environments
The line inlets and closures are part of the explosion protection and must meet the
requirements of the relevant standards for explosion protection.
▸
Do not replace line inlets and closures with other types not approved for use in
explosive atmospheres.
▸
Observe the dimensions of the line inlets.
DANGER:
Danger of explosion through unsuitable screw fittings and lines on the probe
junction unit
▸
Only use lines (according to valid standard) with suitable outer diameters.
▸
Protect lines against electrostatic charges.
▸
Lay lines in the Ex-area firmly, for example by using cable trays.
▸
Only open those cable inlets to be used for installing cables. Keep the plugs. Refit the
original plug when a cable inlet must be closed again afterwards.