Power Supplies with Alarm Output for Low Battery

MEAN WELL offers three very cost-effective solutions for anyone who wants a power supply, which can charge a battery and give an alarm if the battery is getting low.

PSC Series Power Supplies with UPS Function

MEAN WELL PSC-160 Power Supply with Cover — MEAN WELL PSC Series Power Supply

The PSC series power supplies are available with four different power output options as shown in the below table:

Series	Output Voltages Available	Power Output
PSC-35	13.8V (for 12V batteries) 27.6V (for 24V batteries)	35.88 Watts
PSC-60		59.34 Watts
PSC-100		100.05 Watts (13.8V) 100.75 Watts (27.6V)
PSC-160		160 Watts

When you view the data sheet, you will see that the power supplies are available with, or without a cover. Generally speaking, ADM stocks the version with the cover.

You have two alarm signal outputs:

Battery Low
AC OK

This makes these power supplies ideal for use in applications, where remote monitoring is required. It could be argued that the Battery Low alarm is essential if the power supply is being used at a remote location.

There is just one thing to note with the PSC series power supplies. Instead of screw terminals they have Molex type connectors. Connector Kits are available from ADM. We recommend you order the connector kit at the same time as the power supply, so that the power supply can be installed as soon as possible.

DRC Series DIN Rail Power Supplies with UPS Function

Mean Well DRC-100 — MEAN WELL DRC Series Power Supply

MEAN WELL’s DRC series DIN rail UPS power supplies share many features with the PSC series. The only real limitation is the number of output power options available.

If you need anything larger than 100 Watts, scroll down to the information on the DR-UPS40 below.

There are three different versions of the DRC series power supplies to choose from:

Series	Output Voltages Available	Power Output
DRC-40	13.8V (for 12V batteries) 27.6V (for 24V batteries)	40.02 Watts
DRC-60		59.34 Watts
DRC-100		96.6 Watts

You still get the two alarm signals:

Battery Low
AC OK

The only thing to note here is that whereas the DRC-40 outputs the alarm signals via a TTL open collector, the DRC-60 and DRC-100 use relay contacts.

UPS Battery Charging Control Module

The DUPS40 battery charging control module can be used with any MEAN WELL 24V DIN rail power supply, with an output of up to 40amps. There is also a 20A model available under part number DUPS20. The power supply must be adjusted to 27.6V output in order to properly charge a 24V battery.

Although this does mean that you have to have two units mounted on a DIN rail, it is remarkably cost effective when compared to other integrated solutions on the market.

The DUPS40 gives you a wider range of output alarms:

DC Bus OK
Battery Fail
Battery Discharge

There is also a useful built-in battery test function. This will activate the battery fail output if the test indicates a fault condition.

The functionality offered by the above power supplies and modules are highly desirable in any application where, battery failure needs to be avoided. It also allows you to reduce maintenance costs, by eliminating the need for a technician to travel out to remote sites just to test a battery.

If you would like any further information, please do not hesitate to contact ADM.