Power specifications

Power supply

Table 4-2, Alcatel-Lucent 1850 TSS-5 power supply requirements lists Alcatel-Lucent 1850 TSS-5 power requirements.

Table 4-2: Alcatel-Lucent 1850 TSS-5 power supply requirements

Item	Description
Power Feeders	A and B (−48 VDC or +24 VDC)
Voltage range	−40 to −57 VDC +20 to +28 VDC
External fuses required (1 per feed)	Two, 8A fuses

Alcatel-Lucent 1850 TSS-5 uses on-board power conversion eliminating the need for slots for bulk power converters. Two independent −48 VDC or +24 VDC office power feeders (A and B) enter the shelf through a terminal block and are filtered and distributed to the circuit packs. Power conversion is performed via modular power converters located on the circuit packs. Within each circuit pack, the two power feeds are fused, filtered, and connected to the board-mounted power modules through diodes that provide an electrical “OR” connection. This provides the required redundancy in case of the loss of one feeder. The two green power LEDs are located to the left of the input power terminal block.

Current drains

Alcatel-Lucent 1850 TSS-5 has the following current drain requirements.

• 1850 TSS-5: 2.5 Amps (maximum at −48 VDC)

• 1850 TSS-5: 5 Amps (maximum at +24 VDC)

Heat dissipation

The maximum heat dissipation of Alcatel-Lucent 1850 TSS-5 is 100 watts.