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Interconnection diagrams show the cabling between electronic units and how the units are interconnected (fig. 6-18). All terminal boards are assigned reference designations according to the unit numbering method described previously. Individual terminals on the terminal boards are assigned letters and/or numbers according to Standard Terminal Designations for Electronic Equipment, NAVSHIPS 0967-146-0010.
Figure 6-17.-Application of reference designations using unit numbering methods.
The cables between the various units are tagged showing the circuit or system designation and the number as stated earlier. In addition, the interconnection diagram also shows the type of cable used. For example, look at cable R-ES 11 between the power supply unit and the modulator unit in figure 6-18. R-ES I I identifies the cable as the number 11 cable of a surface search radar system. The MSCA-19 (16 ACT) is the designation for a multiconductor ship control armored cable with 19 conductors, 16 active and 3 spares. Individual conductors connecting to terminal boards are tagged with a vinyl sleeving called spaghetti that shows the terminal board and terminal to which the outer end of the conductor is connected. For example, the ends of the conductor in cable R-ES 11 connected to terminals F423 on ITB2 and 2TB2 would be tagged as shown in figure 6-19. |
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