Cable layout and interconnections
Transducer cables
The transducer cables between the TX Junction Boxes, Preamplifier Unit, Transceiver
Unit and transducer arrays are all supplied by Kongsberg Maritime with the system.
For overview of the transducer cabling, see
on page 122
The physical number of cables depends on the chosen system beamwidth as shown
the following tables.
Table 1
TX Cables
TX Cables
System beamwith
Number of transducer modules = Number of cables from TX transducer
array to TX Junction Box(es)
96
0.5 degree
Four TX Junction Boxes are used. Each of these are connected to the
Transceiver Unit with 12 cables, making a total of 48 cables.
48
1 degree
Two TX Junction Boxes are used. Each of these are connected to the
Transceiver Unit with 12 cables, making a total of 24 cables.
24
2 degrees
One TX Junction Box is used. This is connected to the Transceiver Unit with
12 cables.
Table 2
RX Cables
RX Cables
System beamwith
Number of transducer modules = Number of cables from RX transducer
array to Preamplifier Unit
16
1 degree
The Preamplifier Unit is connected to the Transceiver Unit with 8 cables.
8
2 degrees
The Preamplifier Unit is connected to the Transceiver Unit with 4 cables.
4
4 degrees
The Preamplifier Unit is connected to the Transceiver Unit with 2 cables.
The following cable information is available both in the EM 122 installation and
maintenance manuals. The cable markings are normally recorded in the installation
manual first, and it is recommended to copy these records to the maintenance manual
later.
Transmit array cables
Each transducer module and its cable is identified with a serial number as follows
TX<nnn>
317669/B
87
Summary of Contents for EM 122
Page 1: ...EM 122 Multibeam echo sounder Installation Manual...
Page 2: ......
Page 13: ...EM 122 Figure 1 System diagram 317669 B 11...
Page 26: ...EM 122 Figure 6 EM 122 Gondola example Cd021 107 24 317669 B...
Page 27: ...Transducer arrays Figure 7 EM 122 blister and steel pipe arrangements example 317669 B 25...
Page 42: ...EM 122 B B B Plastic TX protection window 40 317669 B...
Page 46: ...EM 122 Figure 10 EM 122 Transceiver unit mounting 44 317669 B...
Page 52: ...EM 122 Figure 13 Rear view 50 317669 B...
Page 54: ...EM 122 Figure 15 Preamplifier Unit mounting 687 52 317669 B...
Page 60: ...EM 122 Figure 18 Remote Control Junction Box outline dimensions 58 317669 B...
Page 85: ...Cable layout and interconnections Figure 32 Transceiver Unit sub racks rear view 317669 B 83...
Page 88: ...EM 122 Figure 34 Preamplifier underneath view 86 317669 B...
Page 128: ...EM 122 Ice window Figure 59 TX Ice window 126 317669 B...
Page 129: ...Drawing file Figure 60 RX Ice window 317669 B 127...
Page 131: ...Drawing file Preamplifier Unit Figure 62 RX Preamplifier Unit internal cabling 317669 B 129...
Page 132: ...EM 122 Figure 63 RX Preamplifier Unit internal cabling 130 317669 B...
Page 154: ...2013 Kongsberg Maritime...