Description
2.4 Design
SITRANS SL
20
Operating Instructions, 12/2010, A5E01132948-04
2.4.3
Cables for connection
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The SITRANS SL is normally delivered without cabling, except for the ATEX version.
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For non-Ex versions the accessory "sensor connection cable kit" is used to connect the
transmitter and receiver unit of the analyzer, while the connection cable is needed to
connect the SITRANS SL electrically to your process control system. All materials used
are flame-retardant.
●
A sensor connection cable kit is available as an accessory and provides the sensor
connection cable, i.e. the cable connecting receiver and transmitter of the SITRANS SL.
The sensor connection cable is available in lengths of 5 m, 10 m or 25 m length
according to your order.
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The sensor connection cable kit also provides the possibility of a permanent installation of
an Ethernet cable.
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A protective hose should be used as UV protection for installations in open cable ducts or
channel systems. It is available as an accessory.
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The statutory directives must be observed in the event of installation in hazardous areas.
For cable specifications refer to section Cable selection recommendations (Page 31)
Electric connections in the ATEX system
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The system is delivered with pre-mounted cables. The connections inside the unit
housings are set up in the factory before delivery and modifications can only be done by
certified technicians.
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The junction boxes mounted to the receiver and the transmitter provide connections for
the sensor connection and the Ethernet cables.
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An Ex-e classified junction box is required to install the connection cable to your process
control system. A suitable junction box is available as an accessory (not represented in
the figure above).
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The sensor connection cable (
⑫
, fig. 2.3) is delivered with unprepared ends. It has to be
prepared according to section Electric connections in the ATEX system (Page 73).
●
The ATEX version of the SITRANS SL is delivered with a sensor connection cable of the
ordered length. This sensor connection cable must be connected between the Ex-e
junction boxes mounted on the receiver and the transmitter.
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All cable kits are part of the delivery and can be ordered separately as spare parts.
See also
Transmitter and receiver units (Page 16)