Installation Instructions

R20 1X UBS Macro B T S Hardw are Installation Adding a second/third PSM (–48 V or 220 V AC only)

Adding a second/third PSM (–48 V or 220 V AC only)

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A second/third PSM is required when expanding a –48 V DC or 220 V AC UBS Macro

BTS frame from low capacity to mid capacity . T wo PSMs are required for the mid

capacity conﬁguration and the third PSM is for redundancy .

Objective

F or –48 V or 220 V AC only , install the appropriate PSM into slot 2. If applicable, remove the

ﬁller plate that covers slot 3 of the PSM shelf and then install the appropriate PSM into slot 3.

Required items

Parts

Nev er plug a –48 V DC PSM into a 220 V AC PSM shelf .

Nev er plug a 220 V AC PSM into a -–48 V DC PSM shelf .

Up to two of either the following parts are required:

• –48 V DC P ower Supply Module (–48 V DC PSM) — Motorola model STPN4037

• 220 V AC P ower Supply Module (220 V AC PSM) — Motorola model STPN4036

Tools

The following tools are required:

• TORX T25 bit and driver

• T orque driver

68P09283A62 -2 3 -19

PRELIMINARY A UG 2007