Allied Telesis IE048-480, Руководство по установке

Страница: 27 / 72

IE048-480 Power Supply Installation Guide
27
Power Alert DC_OK Connectors
The power supply uses the DC_OK connectors on the front panel to alert
you to decreases in the DC output power. By connecting an alert device,
such as an LED or buzzer, to the connectors, you enable the power supply
to immediately alert you if the power on the DC output connectors
decreases for any reason.
The circuit is an on (closed) or off (open) dry contact relay. During normal
operations the circuit is closed. If the DC output decreases, the power
supply opens the circuit. It remains open until DC output power is restored,
at which point the power supply automatically closes it again.
The external alert device has to be able to monitor the circuit for when it is
closed or open. The circuit supports 20mA maximum.
Caution
Do not exceed 20mA on the connector or you may damage it.
 E132
The wire specifications for the DC_OK connectors are given in Table 5.
Table 5. Wire Specifications for the DC_OK Connectors
Wire Description
Solid Wire AWG 24 to AWG 16
(Diameter 0.5 to 1.3mm)
Stranded Wire AWG 24 to AWG 16
(Diameter 0.2 to 1.5mm)
Insulation Strip Length 8mm