TB8100 Service Manual Power Management Unit Fault Finding 217© Tait Electronics Limited September 200613.2 Identifying the PMUYou can identify the model and hardware configuration of a PMU byreferring to the product code printed on a label on the rear panel. Themeaning of each character in the product code is explained in the tablebelow.Note This explanation of PMU product codes is not intended to suggestthat any combination of features is necessarily available in any onePMU. Consult your nearest Tait Dealer or Customer ServiceOrganisation (CSO) for more information regarding the availabil-ity of specific models and options.13.2.1 Colour Coding of Circuit Boards and CardsThe DC converter board and standby power supply card are colour-codedaccording to their nominal input voltage. The auxiliary power supply boardis also colour-coded according to its nominal output voltage. The coloursused are as follows:■ 12VDC – green■ 24VDC – yellow■ 48VDC – red.Product Code DescriptionTBAXXXX-XXXX 3 = PMUTBA3XXX-XXXX 0 = defaultTBA3XXX-XXXX 0 = AC module not fittedA = AC module fittedTBA3XXX-XXXX 0 = DC module not fitted1 = 12V DC module fitted2 = 24V DC module fitted4 = 48V DC module fittedTBA3XXX-XXXX 0 = standby power supply card not fitted1 = 12VDC standby power supply card fitted2 = 24VDC standby power supply card fitted4 = 48VDC standby power supply card fittedTBA3XXX-XXXX 0 = auxiliary power supply board not fitted1 = 12VDC auxiliary power supply board fitted2 = 24VDC auxiliary power supply board fitted4 = 48VDC auxiliary power supply board fittedTBA3XXX-XXXX 0 = defaultTBA3XXX-XXXX 0 = default
