TELEDYNE OLDHAM SIMTRONICS Everywhereyoulook MultiFlame DF-TV7, Operating Manual

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MULTIFLAME DF-TV7
OPTICAL FLAME DETECTOR
OPERATING MANUAL
20 NOSP17662
Revision 03
4.3.1 Connection of the electrical ground braid
Use a shield connection clamp (not supplied) to connect the shielding of the cable to the electric
ground of the housing (see below).
4.3.2 Grounding
A M4 screw passes through the body of the enclosure, enabling the electronic ground of the
housing to be connected to the local ground.
The armour of the power cable is normally connected to the ground of the detector, but it may
depend on site practices.
The external earth connection must be made in accordance with the regulations in force.
4.3.3 Installation recommendation
There are three different type of power supply:
•
3-wires connection (source):
The output current is not isolated from power supply, provided from detector
(standard connection).
•
3-wires connection (sink):
The output current is not isolated from power supply, consumed by the detector
•
4-wires connection:
The output current is isolated from power supply
NB: The power potentials are isolated fromthe electric ground of the housing.
Total loop resistance:
Whatever the power supply type (3 wires source or sink, 4 wires), the total loop resistance
(re cable) should not exceed the following value :
mA 22
V 8 tage supply vol Power
maxi R
−
=
The total loop resistance should not exceed 700
Ω
with a voltage of 24Vdc