01-3373-7D0003/A-08/2022-STVT-308487
BARTEC
OPERATIONAL INSTRUCTION
Technical data subject to change without notice.
Page 4/7
Installation
For fitting into enclosure
In hazardous areas in groups I and II the ComEx
flex
potentiometer
must be used:
– In appropriate enclosures with “Ex e” increased safety type
of protection. The clearances and creepage distances under
IEC/EN 60079-7 Section 4.3, Section 4.4 and Table 1 must be
observed.
– In an enclosure that corresponds to another approved type of
protection specified in IEC/EN 60079-0 Section 1.
With junction box
With junction box
The ComEx
flex
potentiometer must be installed as a stationary unit
and with protection against the risk of mechanical damage.
Take care when connecting conductors:
– Strip 40 mm (1.6 in) sheath off the conductor.
– Remove approx. 6 mm (0.2 in) conductor insulation from the
cores.
– Prepare the ends of fine-stranded and multi-stranded
conductors: Crimp wire end sleeves with suitable crimping
tools. Connection cross-sections: 0.75-2.5 mm2 (14-18 AWG).
– Release terminals.
– Insert conductors diagonally.
– Tight the terminals with a maximum torque of 0.4-0.7 Nm
(0.3-0.5 lb.ft), while holding the screwdriver slightly at an
angle.
Commissioning
Before commissioning, check that:
– The ComEx
flex
potentiometer has been installed in compliance
with regulations.
– The ComEx
flex
potentiometer is not damaged.
– The connection has been established properly (make sure the
cores are secure).
Operation
WARNING
Risk of serious accidents due to operation without an
actuator.
• The ComEx
flex
potentiometer may never be operated without
an actuator at rated voltages > AC 50 V to a max. AC/DC 320
V.
• If the ComEx
flex
potentiometer does not have an actuator, it
must be deenergized.
The ComEx
flex
potentiometer may be operated without an actuator
only at rated voltages of
≤
AC 50 V resp. < DC 120 V.
Maintenance and Fault Clearance
WARNING
Risk of serious injury due to incorrect proceedings.
• IEC/EN 60079-17 must be observed. It is recommended to
formulate a maintenance plan according to this standard.
• Ensure that the voltage supply has been isolated or take
suitable protective measures.
Maintenance
WARNING
Risk of serious accidents due to damaged parts.
• Check potentiometers, potentiometer actuating elements,
actuators, sealings, and cables regularly for cracks and
damage. Make sure that they are properly established.
NOTICE
Potentiometer/potentiometer actuating element damage
due to incorrect cleaning.
• It is not allowed to clean ComEx
flex
potentiometers/
actuators with compressed air.
The operator of the ComEx
flex
potentiometer must keep it in good
condition, operate it properly, monitor it and clean it regularly. The
owner/managing operator must schedule maintenance intervals
which will suit the respective conditions of use.
2
3
1
Terminal assignment:
Resistance:
Type 07-3373-4D40
1 k
Ω
Type 07-3373-4D70
10 k
Ω
