Siemens LDS 6 - Page 18

Technical Information
2.2 Design
LDS 6
18 Operating Instructions, 01/2009, A5E00295894-05
Hybrid and sensor cables
A combination of fiber-optic cables and twisted copper wires connects the sensors to the
central unit. The hybrid cable connects the central unit with the transmitter unit of the sensor,
the sensor cable connects the transmitter and receiver units of the sensor.
2
1
3
1 Twisted pair of wires
2 Multimode fiber
3 Singlemode fiber
Figure 2-5 Connections of the hybrid cable
For installation in EEx-protected environments, the legislative regulations have to be
complied with, such as the spatial separation of intrinsically-safe from non-intrinsically-safe
cables.
● Max. 700 m between central unit and measuring point
● Hybrid and sensor cables
– Multimode fiber-optic cable, provided with SMA connections for transmission of the
measured signal
– Two-wire copper cable, in twisted pair version, for +24 V supply of the detector
electronics (+12 V in the case of EEx-suitable instruments)
● Additionally for the hybrid cable:
– Single-mode fiber-optic cable, configured double-sided with E2000 connectors for
transmission of laser light
● Rugged cable sheath for mounting in open cable ducts or ductworks
● Sheath material: oil-resistant polyurethane