Hardware Description and Reference for Avaya ... - Avaya Support

Appendix A: Specifications for DEFINITY media gateways
Figure 86: Battery charger (optional part of J58890CE-2) (front)
The battery charger is used only without an uninterruptible power supply (UPS). The charger
contains:
● Three 48-VDC batteries for backup power to the cabinet
● A DC power relay to connect the batteries into the power circuit if a main power failure is
detected
Circuit breaker
The circuit breaker protects the AC input power to the cabinet and serves as the main AC input
disconnect switch. The circuit breaker has two poles for 120 VAC or three poles for 208 VAC or
240 VAC. If a problem develops, the circuit breaker automatically opens and removes the AC
power input.
48-VDC batteries
The three series-connected 48-VDC batteries produce a nominal 144 VDC that is fused at 20 A.
The batteries are trickle-charged from the battery charger.
Battery charger
When AC power restores after an outage, the battery charger converts a 120-VAC input to a DC
voltage that recharges the batteries. The batteries usually recharge within 24 hours.
DC power relay
Batteries
The DC power relay disconnects the batteries from a system that is using AC power. The relay
also disconnects the batteries if power fails for more than:
● 10 minutes in a standard-reliability system
● 5 minutes in high reliability and critical reliability systems
● 10 minutes in an expansion port network (EPN)
Battery
charger
psdfbatt RPY 053097
406 Hardware Description and Reference for Avaya Communication Manager