UPS 120, UPS 150, UPS 250, UPS 300, UPS 301, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supplies Caterpillar


Modem (MMS System Cabinet)

Usage:

UPS 250 APZ


Description



Illustration 1g01274973
Modem location
(1) Modem


Illustration 2g01274990
Modem cable connections


Illustration 3g01274975
(2) Modem power supply
(3) Modem transformer (T4)


Illustration 4g01274991
Modem power supply wire connections

The optional modem adds the following components to the system:

  • Modem (1) to the top of the cabinet

  • Modem power supply (2) to the left panel of the cabinet

  • Modem transformer (3) to the left panel of the cabinet


Illustration 5g01274992
115 VAC wire connections for the modem transformer (T4)


Illustration 6g01274994
230 VAC wire connections for the modem transformer (T4)

The external modem power transformer (T4) (3) is powered from the output of the UPS. The transformer (3) can be either of the two configurations: 230 VAC and 115 VAC. The transformer (3) converts AC voltage to the appropriate level for operating the modem. Refer to Illustration 5 and Illustration 6 for wiring connections.



Illustration 7g01291212
Overview of modem

Caterpillar Information System:

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