DA458-1: 4A 24V DC Rack-mount power supply with VRLA battery support and monitoring
This range of 19" 3U rack-mountable switched-mode power supplies can accept between 100V to 240V and will provide an output of 24V DC at up to 4A.
- Integrated UPS function VRLA Battery back-up
- Fire enable
- Mains fail & Low voltage signalling
- Low-battery disconnect
- House and charge 2 x 12Ah VRLA batteries
- 19" 3U rack-mountable enclosure
- Removable front plate
- Output via front-mounted termination
These units will house and charge up to 2 x 12Ah VRLA batteries and are equipped with two separate DPCO (double-pole change-over) contacts for mains-fail & low-voltage signalling.
Battery low-voltage disconnect, if the voltage from the battery falls below 9.5V DC, for example after an extended mains-failure, the battery terminal will disconnect. When the unit voltage recovers (when mains is resumed) the battery terminals will reconnect, allowing recharge.
Fire enable output switching can be driven from a 12V or 24V DC supply. A typical use for this relay would be interfacing a fire panel with the power supply to de-power magnetic locks in the event of a fire condition.
Integrated UPS function VRLA Battery back-up support
Two 12Ah VRLA batteries can be placed within the unit and connected to the battery terminals of the PCB. This power supply will automatically float-charge the battery to capacity, providing continuous uninterrupted power from the battery if mains power is unavailable.
Batteries are not included. This unit can be used with or without batteries fitted.
Fire enable
Output switching can be driven from a 12V or 24V DC supply. A typical use for this relay would be interfacing a fire panel with the power supply to de-power magnetic locks in the event of a fire condition.
Mains fail signalling
If the mains-input power is not detected for approximately 30 seconds, the mains-fail
relay will change-over. The delay helps prevent false triggering during common power fluctuations within the national grid. The clean normally open-circuit (N/O) & normally-closed-circuit (N/C) relay contacts can be used to switch or signal other systems.
Low-battery signalling
Should the connected VRLA battery be nearing depletion, the Low Vol
relay will change-over. The clean N/O & N/C relay contacts can be used to switch or signal other systems.
Low-battery disconnect
In the event of a prolonged mains power failure where the connected VRLA battery has been depleted, the battery will be automatically disconnected to protect against damage from deep discharging. When mains power is restored, the battery will automatically be re-connected and float-charged ready for use.
House and charge 2 x 12Ah VRLA batteries
The DA458 has an easy access 3U pull out front drawer that can house up to two 12Ah 24V VRLA batteries. Once connected, these will float-charge at 13.7V when mains power is available.
19" 3U rack-mountable enclosure
All-in-one power and UPS, ideal for security and access control applications in one single 19" 3U rack-mount unit.
Removable front plate
The DA458 pull out drawer has a removable front plate to give easy access to the units individually fused outputs.
IEC C13 lead with UK mains plug
This unit is fitted with an IEC C14 socket to accept IEC C13 connectors. Each product includes an IEC lead with a UK Mains plug.