Dual Door Controller (DDC)
Technical Specifications
Integrated Digital Controller Hardware
Dual Door Controller (DDC)
Features:
The Dual Door Controller (DDC) is an access control field device that functions as a
door interface for the Network Local Controller (NLC) Board, integrating card readers
and associated door hardware into a single system. The DDC is configurable for two
doors (with entry readers) or for one door (with entry and exit readers).
The DDC memory stores 20,000 card records. All access control decisions for its two
readers are made by the DDC using this database. Cards that have not been used for
a preset number of days are removed from the DDC database and replaced with
more active cards.
When a card’s record is not
found in the DDC database,
the card data is passed to the
NLC for the access control
decision. If communication
between the DDC and NLC
is disrupted, the DDC
continues to make access
decisions for its 20,000
cardholders. Up to 512 events
are stored at the DDC and
passed to the NLC when
communication is restored.
The DDC features 2 reader
ports, flexible input and output
configurations, FLASH memory
for application programs
(firmware) and SDRAM for
cardholder database and event
storage. The interface between
the DDC and NLC utilizes
industry standard RS-485
communication protocol that
allows the DDC to be located up to 4,000 feet from the NLC Board.
The DDC is configured with a diagnostic port which allows field service and other
technical personnel to view activity, perform diagnostics analysis, and make necessary
system configuration changes.
• Supports 2 doors with
Entry Readers or 1 door
with Entry/Exit Readers
• Each reader port has
connections for power, data,
2 LEDs and Buzzer
• Supported readers include
Magstripe, Wiegand,
Barcode, Proximity,
Biometrics, and SmartCard
• Supports industry standard
and custom card formats
• Stores 20,000 Cardholder
Database
• Access decisions are made
at the DDC using local
database, even during loss
of communication with NLC
• Stores 500 events
• Access decisions are made
at NLC when card not found
in DDC database
• Inactive card records are
removed from DDC
database and replaced with
active cards
• 4 Supervised inputs: 2 door
monitor and 2 alarm inputs
• 8 Non-supervised inputs:
2 Request-to-exit (REX),
2 tamper and 4 Auxiliary
inputs
• 6 Form-C output relays (3
per door): door lock, alarm
and spare
• Accepts 6.0 - 16.0 VDC
power source
• Downloadable FLASH
memory eliminates the
need to change EPROMs
for applications programming
and system upgrades
RS-485 bus remote
installation up to 4,000 feet
(1300m) from NLC
DDC-01/08/13
www.monitordynamics.com
Technical Specifications - Integrated Digital Controller Hardware
Dual Door Controller (DDC)
Primary Panel Features:
Electrical
Power
Current Draw
RS-485 port
to NLC
6-16 VDC
120mA maximum
5 VDC or input DC
Ground
Dimensions
Width
Length
Height
7.0 in. (178 mm)
5.0 in. (127 mm)
1.0 in. (26 mm)
Environment
Temperature
Humidity
32ºF-120ºF, (0ºC-50ºC)
10%-95% (non-condensing)
Memory
Read Only
Random
5 VDC or input D
Ground
Data 0, data
Data 1, clock
Reader A
Reader B
LED 1
LED 2
Buzzer
LED 1
LED 2
Buzzer
Door Contacts
REX
Door Contacts
REX
Door A
Door B
Door Lock Relay
Door AlarmRelay
Door Lock Relay
Door Alarm Relay
Tamper Switch
64 Kbytes Flash Memory
512 Kbytes SDRAM for
- Card Data: 20,000 cards
- Event Storage: 512 events
on loss of communications
with NLC Board
Communications
Protocol
RS-485
Distance
4,000 feet
Media Type
Twisted Pair (Belden
9841 cable)
Diagnostics
RS-232
Port
Readers
Quantity
2
Configurations Two doors (Entry/Entry) or
Single Door (Entry/Exit)
Types
Magstripe, Wiegand,
Proximity, Barcode, Biometric,
and SmartCard
Card Formats Standard and Custom
LED Support Single or dual color per reader
Buzzer Support 1 per reader
Supplied Power +5 VDC @ 100mA total or
direct DDC input voltage
Data 0, data
Data 1, clock
Tamper Switch
Dual Door
Controller
( DDC )
General Purpose
Inputs
General Purpose
Inputs
Spare Relay
Spare Relay
RS-232 Port for
Diagnostics
Inputs
Supervised
NonSupervised
2 Door position
2 Alarm or general purpose
2 Tamper
2 Request to Exit
4 Alarm or general purpose
Outputs
Relay Outputs 2 Door Lock
2 Alarm (ON - door forced or
door propped timeout,
PULSING -(door propped
warning)
2 Spare
Design and specifications subject
to change without notice.
www.monitordynamics.com
DDC-01/08/13
12500 Network Blvd., Suite 303 San Antonio, TX 78249-3307
Tel: 210-477-5400 • Fax: 210-477-5401 • Toll-free: 866-435-7634
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