Siemens HydroRanger 200 HMI, Руководство по эксплуатации

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Upgrading
E.3 Co-axial transducer extension
HydroRanger 200 HMI
354
Operating Instructions, 06/2018, A5E36281317-AC
E.3 Co-axial transducer extension
This device uses a differential input receiver that works either directly connected to the
transducer lead, or with a screened twisted pair extension cable via a field junction box. This
arrangement, using two conductors and a screen, gives considerably better electrical noise
immunity than the previous co-axial arrangement (up to 20 dB). It gives a more reliable
operation in applications where the proximity of power cables, variable speed drives, etc.
would have caused problems.
If you are installing a new device and an extension is required, we strongly recommend that
you use a good quality screened, twisted pair cable. If the integral transducer cable is used,
you only need to connect the device and benefit from its superior performance.
E.4 Connecting a transducer with RG62 co-axial extension cable
If you are replacing an older Siemens Milltronics Ultrasonic Level Controller with a new
device where an RG62 co-axial extension is fitted, and you are unable to replace the
extension with a new cable, please refer to the connection diagram below. Please note that
the noise immunity performance will be similar to our older model ultrasonic level controllers
if you use a co-axial cable.
Existing installation
RG62 co-axial cable has been used to make the extension. The level controller might be a
MultiRanger 100/200, MultiRanger Plus, HydroRanger 200, HydroRanger Plus or our other
similar devices.