DRC-40 Datasheet, PDF (4/5 Pages) Mean Well Enterprises Co., Ltd. – 40W Single Output with Battery Charger (UPS Function)

40W Single Output with Battery Charger (UPS Function)
DRC-40 series
Suggested Application
1.Backup connection for AC interruption
(1) Please refer to Fig1.1 for suggested connection.
The power supply charges the battery and provides energy to the load at the same time when AC mains is OK.
The battery starts to supply power to the load when AC mains fails.
A : 12V
B : 24V
Battery
+-
Bat+
Bat-
Load
+-
V+
V-
DC OK
+
+V AD J
Fig 1.1 Suggested system connection
2.Alarm signal for AC OK and battery low
(1) Alarm signal is sent out through " AC OK " & " Battery Low " pins.(TTL open collector output is provided for standard model, and relay contact output is provided as
optional model.)
(2) An external voltage source is required for this function. The maximum applied voltage is 50V and the maximum sink current is 30mA. Please refer to Fig 2.2.
(3) Table2.1 explains the alarm function built in the power supply
Function
Description
Output of alarm
AC OK
The signal is "Low" when the power supply turns ON.
The signal turns to be "High" when the power supply turns OFF.
Low (0.3V max. at 30mA)
High or open (External applied voltage 50V max.)
The signal is "Low" when the voltage of battery is under A:11V, B:22V.
Battery Low
The signal is "High" when the voltage of battery is above A:11V, B:22V.
Low (0.3V max. at 30mA)
High or open (External applied voltage 50V max.)
Table 2.1 Explanation of alarm signal
AC OK (Battery low)
R
V
Pin6(Pin8) Short with output -V External voltage and R
(The max. Sink is 30mA and 50V)
Fig 2.2 Internal circuit of AC OK (Battery Low), via TTL open collector
File Name:DRC-40-SPEC 2015-03-12