DMP Electronics DMP 505-12 Installation Manual
INSTALLATION GUIDE
505-12 Power Supply
Description
The DMP 505-12 Series Power Supplies are regulated, power limited, switching power supplies. The 505 Series are
rated for 12VDC @ 5 Amps maximum. Each power supply includes a transformer, battery leads and is mounted in an
enclosure. Each power supply provides connections for AC input, DC output, and a standby battery. Also included
are a low AC input LED indicator, a low standby battery LED indicator, AC trouble and battery trouble relays, and
on-board transient protection for the AC input and the DC output. The 505-12LX includes two Model 867 Style W
Notication Modules.
Mounting the Enclosure
Mount the power supply metal enclosure in a secure, dry location to protect the unit from damage due to tampering
or the elements. It is not necessary to remove the PC board or transformer when installing the enclosure.
Enclosure 505-12/505-12LX
Material 20-gauge, cold-rolled steel
Colors Gray (G) or Red (R)
Dimensions 15.75” H x 12.5” W x 4.75” D
Enclosure 505-12A
Material 18-gauge with 16-gauge door
Colors Gray (G)
Dimensions 17.5” W x 13.5” H x 3.75” D
Mounting Optional NAC Modules
The power supply enclosure can accommodate the addition of two NAC modules for powering various listed
notication appliances. Use either the DMP Model 865 conventional Class A NAC module, the Model 866 conventional
Class B NAC module, or the Model 867 LX-Bus NAC module. Install any of the modules inside the enclosure using the
three hole mounting conguration. Plastic standoffs are provided with each module that attach to the enclosure.
See Figures 1 and 2.
To Earth
Ground
Input 120VAC 60 Hz
Unswitched
1.5 Amps
Enclosure 505-12L
Material 18-gauge, cold-rolled steel
Colors Gray (G) or Red (R)
Dimensions 17.5” W x 13.5” H x 3.5” D
To Panel
Green
Ground
White
wire
attached
to the
inside of
the
enclosure.
Black
16VAC @ 100VA
Violet
Green
LED
AC
AC
Factory
Installed
Gray
Red
LED
DC
+ BAT —
RED BLK
Battery Wires
(included)
AC and battery
Battery
Start
J3J2
Trouble
Shaded area for approximately two batteries.
NAC Module
Power Limited/class 2 wire routing
through knockouts into conduit.
12VDC @ 5 Amps
output relay
connections
AC
Batt
Connect J4 to a control
Trouble
panel trouble zone or an
J4
867 NAC Module trouble
C
C
N/C
N/C
zone.
For Access Control Applications
(UL 294) install the Model 307,
307-S, or 3012 Tamper Switch.
Connect NAC modules together.
J6
+ DC —
Tie Down Wires
To control panel
tamper zone.
Optional
wiring
to Panel
NAC
Module
Figure 1: 505-12, 505-12LX Wiring Diagram
To Panel
350 or 350A Enclosure
Connect NAC modules together.
To Panel
Input:
120VAC
60 Hz
1.5 Amps
Unswitched
NAC
Module
Green wire
attaches to
enclosure
mounting
hole.
Transformer
Output
16VAC @ 100VA
Green
LED
AC
To
AC
AC
Black
Green
White
Mounting
Hole
Gray
Factory
Installed
Violet
Space for batteries on enclosure lower shelf.
505-12 Power Supply
Red
LED
DC
J3J2
+ BAT -
Black
Red
Battery Wires
(included)
Battery
Start
12VDC @ 5 Amps
AC and battery output
relay connections
(rated 12V @ 2 Amps)
AC
Trouble
Batt
Trouble
J4
C
C
N/C
N/C
Power Limited/class 2 wire
routing through knockouts
For Access Control Applications
(UL 294) install the Model 307,
307-S, or 3012 Tamper Switch.
J6
+ DC -
Connect Power Supply J4
to a control panel trouble
zone or an 867 NAC
Module trouble zone.
Mounting Hole
into conduit.
To control panel
tamper zone.
Optional
wiring
to Panel
NAC
Module
Figure 2: 505-12L and 505-12A Wiring Diagram
Wiring
AC Connection
Connect the transformer to an unswitched 120VAC 60 Hz power source with at least 1.5 Amps of available current.
In Figure 1, connect AC power to the transformer Black and White ying leads. In Figure 2, connect AC power to the
terminal block. Always secure the green wire lead to earth ground.
Note: Use 18 AWG or larger for all power connections. Ensure there is a minimum 0.25" space to keep power limited
wiring separate from non-power limited wiring (120VAC/60 Hz input, battery wires). The power supplies must be
properly grounded before connecting any devices or applying power to the unit. Proper grounding protects against
electrostatic discharge (ESD) that can damage components.
Digital Monitoring Products 505 Series Installation Guide
2
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