23
4.7
Connection of Remote Mounted Version
The BTS 12L signal cable is specifically for CORIMASS remote mounted versions and must be
used to assure proper operation. This cable must be connected as described below. The color
of the outer sheath is black for all standard instruments. For instruments located in hazardous
areas, the cable sheath may be blue or black depending upon the specific electrical
classification and the approval agency (PTB, FM, etc.). Figure 26 shows a cross-section of the
BTS 12 L cable. Please note that not all conductors are used in the MFM 2081 / 3081 F
application. Figures 27 through 30 depict the connection of this cable to the transducer and
converter.
Minimum bend radius of cable should be 24 cm (10 inches). The cable must be fixed carefully
in the vicinity of the transducer to avoid resonant vibrations of the cable. Also, all screws in
the terminal boxes and covers should be securely fastened.
Maximum cable length is dependant upon software version and may also be limited by CE
requirements or local requirements for hazardous locations.
CAUTION:
When blue cable is required for hazardous duty installations, it is an essential part of the
approval. For other cables the hazardous duty protection approval is not valid.
Furthermore the ground terminals located on the transducers should be connected to the
potential compensator for the hazardous area.
CAUTION:
For applications where CE approval is required, the supplied signal cable fittings must be
properly installed to provide less than 1 milliohm contact resistance between the cable overall
shield and the fitting body.
Fig. 26: BTS 12 L Signal cable cross-section
