PS902-2RS Power Supply



Grade 1

Fire Alarm Relay


Output Amps


Output Volts

12/24 VDC

Package Qty


Modular Options


ADA Approved


PS902 Boxed Power Supply, 2A @ 12/24 VDC-Field Selectable, With 900-2RS 2 Relay Board Output

PS900 Series 2 Amp Power Supply

The Schlage comprehensive line of power supplies and option boards was designed to address the changing needs of the access control market.

Installation is simplified by utilizing a flat mounting design and polarized locking connectors for option boards. This design eliminates the need for racks and side connectors. The flat mounting of the option boards also provides for easier access to the terminal blocks for connection of electrified devices (such as electrified strikes, electromagnetic locks, card readers, etc.).

Common to the line of PS900 Series power supplies is a constant output rating at both 12v and 24v settings, universal 120 VAC to 240 VAC input, and polarized option board connectors. New fire alarm interface board mounting allows outputs to be configured as switched (power cut) or unswitched (power continues) when signal is provided.

Features and Benefits:

2A @ 12/24 VDC constant output, field selectable with jumper

Provides low-voltage, Class 2, filtered and regulated power

Universal 120-240 VAC, fused primary input

Single polarized option board connector

AC input and DC output monitoring circuit with LED indicators

Externally visible AC input indicator with isolated SPDT contacts

High-voltage protective cover for AC circuitry (not shown)

Battery back-up board auto-selects voltage

Optional Fire Alarm plug-in board available

UL 294, ULC-S318, RoHS, and FCC Part 15 certified

PS902 power supply specifications Input voltage:

120/240 VAC, 50/60 Hz, universal input

Output voltage:

2A @ 12 or 24 VDC

Field selectable with jumper

Switching supply, 5% regulation, 240mVpp max ripple


Grey/baked enamel

14″ x 12″ x 4″ (H x W x D)

Eight 1/2″ x 3/4″ knockouts

NEMA Grade 1

Hinged cover with lock down screws

Operating temperature:

32° – 120°F (0° – 49°C)





FCC Part 15

Class 2

Battery backup (install on main board):

900-BB: Battery backup board only

900-BBK: Battery backup kit (backup board plus battery pack)

Available option boards:

900-FA: Plug-in fire alarm (install on main or option board)

900-2RS: 2 Relay option board capable of individual or sequential operation for single and pair door applications

900-4R: 4 Relay option board

900-4RL: 4 Relay option board with integrated logic and individual or sequential operation capability for controlling security interlocks, auto operators, and time delay function

900-8F: Fused, 8 zone option board

900-8P: PTC, 8 zone option board

AC primary fuse size:

3.15A, 250v, 5 x 20mm

Battery fuse size:

7.5A 32v ATO blade style

DC output protection:

Overload protection – current limited foldback circuit


LED indicators:

AC input (visible on outside of enclosure)

DC output

Isolated SPDT contacts to monitor AC power status

Weight (power supply):

Approx. 9.0 lbs

Weight (each battery):

4.0 lbs

AC input termination:

3 position terminal block with protective cover

Wire capacity: 10 AWG max.

DC output termination:


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