Specifications

Installation and Operation Manual Quick Start Guide
ASM-MN-214 Ver. 1.0 Power Supply 3
3. Power Supply
The ASM-MN-214 chassis can accept both AC or DC power supplies (PS). LED
indicators located on the ASM-MN-214 front panel show activity when the power
supply is connected to the mains plug (see
Figure 2 ). The power supply supports
the full chassis with any combination of cards.
AC Supply (100, 115 or 230 VAC)
The AC power supply of the ASM-MN-214 accepts 100, 115 or 230 VAC, ±10%,
50/60 Hz.
DC Supply (24 or -48 VDC)
The DC power supply is -48 VDC (-36 to -72 VDC) or 24 VDC (18 to 32 VDC). It
uses a DC/DC converter module to provide the power required for the cards.
Power Supply with Redundancy
The ASM-MN-214 chassis can accommodate two separate power supplies,
operating together and sharing the load of the whole chassis. If either of the
power supplies fails, the other one will continue to supply power to the full
chassis.
The activity of each of these two power supplies is indicated by a LED. They
should both light when mains power is provided.
Each power supply can be replaced during operation without affecting the
operation of other modems (hot swapping).
³ To change the power supply:
1. Loosen the two screws on the power supply.
2. Slide the power supply away from the ASM-MN-214 unit.
3. Replace the power supply.
4. Check that the red Power light is ON.
AC and DC power supplies may be combined in the same cage.
The plug-in cards are powered from the ASM-MN-214 power supply via its edge
connector. Each modem card has two fuses which protect the entire system
against power failure caused by a short circuit in one card.
Note