Napco ACM1D DATASHEET

Add up to 8 Doors
of Access Control
to Gemini Panels

• Economical access control,

easily added & installed

• Seamless Integration with Gemini

Control Panels

• Single site programming and

shared database

• Fast transaction speeds

• Power for prox readers & mag locks

built into GEM-Access Control
Module

• Available in money-saving kits

with HID Prox readers and cards or
Gemini-PX Prox Readers and cards

NAPCO GeminiAccess ™ Access Control Module, # GEM­ACM1D adds integrated access control to the burglar alarm
functions of the GEM-X255 255-Zone Hybrid Control Panel,
enabling the easy creation of a fast, economical seamless system
with shared database and programming. Up to 8 doors of access
can be added to the GEM-X255 System. (In later GEM-ACCESS
versions, GEM-9600 and 3200 panels will also be supported.)
The GeminiAccess Module is housed in its own compact metal
enclosure and includes a power supply for the unit, as well as
power for the prox readers & mag locks in the system for easy,
cost-effective installation. Each GEM-ACM1D Module provides
1 door of access, expanded for a second controlled door by
simply adding a Plug-In PCB, model no. GEM-2D (as pictured
above). The Gemini Security System Control Panel is made
compatible with easy replacement of its standard EPROM with a
GeminiAccess software enhancement upgrade.

GeminiAccess provides controlled access to a door by releasing
a mag or electric strike when a valid Prox card or Prox keyfob is
presented to an HID or GEM-PX proximity reader. Access control
is integrated with the burglary functions of the GEM-X255.
GeminiAccess enables specially authorized prox card holders to
arm and disarm the system with their card. Plus, by sharing the
door contact with the burg. system, one contact will both monitor
the door and annunciate and report alarms and troubles.

Providing unsurpassed transaction speeds for processing
cardholders, GeminiAccess performs all access decisions
immediately, independent of the Gemini Alarm Panel. Unlike
competitive models, if the bus is cut, NAPCO Gem-Access will
continue to provide uninterrupted access control in a standalone
capacity. The number of users and the number of scheduled events
is based on Gemini Panel capacity, so used with the Gemini X255,
the number of users is 195 and the events are 255. The Gemini
Burg. and GeminiAccess systems are both programmed from
a single site, using NAPCO PCD-Windows software. The GEM­ACM1D requires the panel for uploading user codes/attributes (and
their associated schedules), uploading door attributes, digital dialer
reporting and all Keypad/ACM trouble/information displays. The
panel’s Event Scheduler is used to control user access by scheduling
“User Off” and “User On” events.

Up to 4 GEM-ACM1D modules can be connected to a GEM­X255 control panel via standard, unshielded keypad bus wire.
Each expanded Gem-Access module, ie., with installed GEM-2D
plug-in PCB, is capable of controlling access through 2 doors
and uses a keypad location in the system for communication.
Each 2-door access unit is fully supervised and reports specific
troubles at system keypads (AC/DC Power, Battery Troubles),
as well as tamper. And, the 2 prox readers controlled by each
expanded GeminiAccess Module can be programmed to function
independently on different doors, or together, controlling access

for both sides of one door.

Manufacturing great security products is all we do. It’s that simple.

™

PRELIMINARY SPECIFICATIONS:

The GeminiAccess System supports HID standard 26 bit
format and/or NAPCO Gemini Prox format.

Recommended prox readers:

• HID Prox Point Plus Model 6005B

• NAPCO GEM-PX Prox Reader with Alarm Status LEDs

The GEM-ACM1D also supports the use of any “Request to
Exit” device and any UL 294 listed mag lock.

GEM-PX Prox Reader with Alarm Status Indicators

The unique GEM-PX Prox Reader includes LED status
indicators for both the access and alarm system The LED’s
function as follows:

• RED – Displays System Armed (on solid), system disarmed,

(off) and system in alarm (blinking).

• GREEN – Displays Ready to Arm (on solid), not ready (off).

(Note: Alarm Status indication is a programmable option by Module and may be
eliminated in undesirable instances, for example, where the reader is visible from outside
the premises, etc.)

GEM-ACM1D Power Supply

The GEM-ACM1D has an integral power supply which
includes two primary linear regulators. The first regulator is
used to power the panel, the readers and to recharge the
battery. The panel and readers are supported with battery
standby. The second regulator is used to supply up to 1.5A
12VDC for the door locks, which provides enough current to
support two 750mA electromagnetic locks. The Door Lock
Power has an option to enable battery standby with a shunt
connector placed across jumper JP3 (factory default). The
battery is prevented from damage caused during extended
power failures with a battery drop out circuit that disconnects
the battery when there is no AC present and battery voltage
drops to approximately 9VDC. When AC is restored, the
battery is automatically re-connected and begins to recharge.
The GEM-ACM1D tests the battery under load every 4 hours
and when the RESET button is pressed. The low battery
condition will only restore after it passes the active test. The
duration of this test is 15 seconds. The separation of the door
lock power from the rest of the system reduces the likelihood
that turning off the power to the door lock coils will affect
performance of the system. The use of linear versus switching
regulators significantly reduces electrical noise that may
hinder the sensitivity of proximity card readers.

Fire System Integration

GeminiAccess includes an “Emergency Free Access” zone
for integration with a fire system. The output(s) from the fire
alarm system must be wired so that if there is a fire alarm
or AC failure of the fire alarm system, the “Emergency Free
Access Zone” is either shorted or opened. (Before installing
the access control system, be sure to consult with the authority
having jurisdiction to be sure to comply with all local codes.)

Operating Temperature: 0–49°C (32-120°F)
Input Power: 16.5VAC via CLASS 2 Plug-In 40VA or 50VA Transformer
Door Zone Loop Voltage: 10-13VDC
Door Zone Loop Current: 2.4mA with 2.2K EOLR
Door Zone Loop Resistance: 300 ohms maximum
Combined Door Lock Power:

D1 PWR (terminals 3+ and 4-) + D2 PWR (terminals 5+ and 6-)

Voltage Rating: 12VDC
Maximum Current: 1.5A
Battery Standby Time:

JP3 not installed: Standby Time = 0*
JP3 installed (factory default)

Reader 1 PWR: READER 1 PWR (terminals 17+ and 18-)

Voltage Rating: 12.5VDC to 11.7VDC with JP1 set to 12V
(default). 5V with JP1 set to 5V.
Maximum Current: 125mA

Battery Standby Time:

JP3 not installed and 4AH battery used = 4 Hour*
JP3 installed (factory default)

Reader 2 PWR***: READER 2 PWR (terminals 35+ and 36-)

Voltage Rating: 12.5VDC to 11.7VDC with JP4 set to 12V. 5V
with JP4 set to 5V.
Maximum Current: 125mA
Battery Standby Time:
JP3 not installed and 4AH battery used = 4 Hour*
JP3 installed (factory default)

Typical Applications:

App. Example 1 – uses a single prox reader on the exterior of the
restricted area and a “Request to Exit” button within the restricted
area. This method only requires a single reader for each access
door. This method is limited in that only entrance via the card reader
is logged or printed (requires GEM-PRINT module). The use of the
“Request to Exit” button is not logged.
App. Example 2 – uses 2 prox readers (one reader mounted inside
and another outside the restricted area); both connected in parallel
to a single card reader interface. This method requires presenting
the credential for both entry and exit from the restricted area. Each
presentation of the credential is logged and optionally printed
(requiring GEM-PRINT module on the system).

Ordering Information:

GEM-ACM1D Access Control Module for 1 Door

Module in metal enclosure, w/ power supply, transformer and
software enhancement upgrade EPROM for Gemini Alarm Panel.

GEM-2D 2nd Door Plug-in PCB, for use in above.
GEM-1DKIT Economical GEM-PROX Kit Module in enclosure, w/

power supply, transformer, Panel Prom, GEM-PX Prox Reader with
Status LED Indicators, 25 Gemini Prox Cards.
GEM-1DKITA HID Reader Kit, as above, with HID Reader and 25
HID 1326 Prox. Cards
GEM-PX Gemini Prox Reader with Access and Alarm Status
Indicators

GEM-PXC/50 50 Additional Gemini Prox Cards
GEM-H1326 HID Prox Reader

GEM-H1326C/100 100 Add’l HID Cards

SPECIFICATIONS

Housing Dimensions: 11”x12 1/8”x3” (28x30.8x7.6cm) HxWxD
GEM-X255 Current Draw: 5mA

333 Bayview Avenue, Amityville, New York 11701 USA • 1-800-645-9445 • www.napcosecurity.com

* UL installations require JP3 to be removed. *** Requires GEM-2D to be installed. Preliminary specifications , subject to change.
Gemini and GeminiAccess are trademarks of NAPCO. HID and Windows are trademarks of their respective companies. © NAPCO, 9/04 A481

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