Alarmcom ADC-ACX1 User manual
SINGLE READER
EXPANSION
MODULE
INSTALLATION GUIDE
TR-
GND
TR+
VO
GND
TB4
BZR
LED
CLR
D1
D0
DAT
TB1
12
1 2 3 4 5 6 7 8
13
14
B A
15
U1
K2
K1 TB3
TB2
11
NO
NC
11
12
12
GMD
VIN
C
NO
NC
C
K2K1
0.20” [5.1 mm]
2.75” [69.9 mm]
2.35” [59.7 mm]
0.20” [5.1 mm]
STATUS LEDs Ø0.156” [Ø4.0 mm]
TAMPER INPUT
NORMALLY OPEN SWITCH
3.85” [97.8 mm]
4.25” [108 mm]
SINGLE READER
EXPANSION
MODULE
The ADC-ACX1 Single Reader Expansion Module provides a
solution for interfacing to a one Wiegand reader and door
hardware. It also provides LED control and buzzer control.
Two Form-C contact relay outputs may be used to control
locking hardware. The two inputs provided can be used for
monitoring door contacts and request to exit devices.
using end of line resistors. Communication to the Alarm.com
Door Controller is accomplished using a 2-wire RS-485
interface. The ADC-ACX1 requires 12 to 24V DC for power.
2| Single Reader Expansion Module
Wiring
CONNECTIONS
TR+
RS-485 Bus TR-
GND
VIN Input Power
GND Input Power Ground
I2
Input 2
I2
I1
Input 1
I1
NC Relay K1 - Normally Closed Contact
CRelay K1 - Common Contact
NO Relay K1 - Normally Open Contact
NO Relay K2 - Normall Open Contact
NC Relay K2 - Normally Closed Contact
CRelay K2 - Common Contact
GND Reader Ground
BZR Reader Buzzer Output
LED Reader LED Output
CLK/D1 Reader CLK/Data 1
DAT/D0 Reader DAT/Data 0
VO Reader Power Output
ADC-ACX1 Installation Guide | 3
Status LEDs
All LEDs OFF
Once power is applied, initialization of
the module begins
The A LED is turned ON at the beginning of initialization
After a successful initialization, the LEDs have
the following meanings:
Heartbeat and On-Line Status:
1 second rate, 20% ON
1 second rate, 80% ON
to be downloaded: 0.1 s ON, 0.1 s OFF
Communication Port Status: Indicates
communication activity on the communication port
Communication Wiring
The ADC-ACX1 communicates to an Alarm.com door
controller using a multi-drop 2-wire RS-485 interface.
The total cable length is limited to 2,000 feet (609
meters). Shielded cable of 24 AWG with characteristic
485 interface. If the ADC-AX1 is the last device on the
communication bus, jumper J4 must be installed.
4| Single Reader Expansion Module
GND
DAT
CLK
ADC-ACC1-17
TR+
TR-
GND
ADC-ACX1
OR
ADC-ACX2
GND
TR-
TR+
GND
TR-
TR+
ADC-ACX1
OR
ADC-ACX2
USE TWISTED PAIR
24 AWG, 120 OHM
IMPEDANCE
CABLE WITH DRAIN AND
SHIELD WIRES. 2,000 FT.
(609 M) MAXIMUM
TOTAL LENGTH.
UP TO EIGHT TOTAL EXPANSION MODULES MAY
BE WIRED. THE LAST EXPANSION MODULE ON THE
BUS MUST HAVE JUMPER J5 INSTALLED FOR
ADCACX2 MODULES AND J4 INSTALLED FOR
ADCACX1 MODULES.
RS-485 Wiring using the ADC-ACC1-17 Door Controller
For ease of install, daisy chain expansion modules together. Wire each
expansion module to the next module instead of wiring directly back to
the controller.
ADC-ACX1 Installation Guide | 5
Addressing
Install the jumpers on the ADC-ACX1 expansion module
according to the "Jumpers/Switches ON" column in
the Access Control Devices table on the Alarm.com
Dealer Website. These jumpers are also displayed in the
"Add Expansion Module" installation wizard. If these
jumpers are not installed according to the website, the
device and its connected reader and door hardware will
not function properly with Alarm.com.
Reader Wiring
The reader port supports a one Wiegand reader.
voltage used for the ADC-ACX1 board must be powered
separately.22 AWG minimum recommended for readers.
VO
LED
BZR
D1/CLK
D0/DAT
GND
TB4
1
Typical Reader Wiring
The input power is passed through to the reader terminal
strip and is available for powering a reader. Care must be
taken to ensure that the input voltage is within the voltage
range of the reader.
The reader power output terminal, TB4-6 (VO), is not
current limited.
6| Single Reader Expansion Module
DC STRIKE
FUSE
DIODE
TO DC POWER SOURCE
Typical DC Door Strike Wiring
DIODE SELECTION
• Diode current rating: 1x strike current
• Diode breakdown voltage: 4x strike voltage
• For 12V DC or 24V DC strike, diode 1N4002
(100V/1A) typical
Relay Wiring
Two Form-C contact relays are provided for controlling
door lock mechanisms. Each relay has a Common pole (C), a
Normally Open pole (NO), and a Normally Closed pole (NC).
When momentarily delivering power to unlock the locking
hardware (fail secure), the Normally Open and Common
poles are used. When momentarily removing power to
unlock the locking hardware (fail safe), the Normally Closed
and Common poles are used. Check with local building codes
for proper egress door installation. 18 AWG minimum
recommended for electric locking hardware.
The current ratings are 5 A for relay K1 and 1 A for relay
K2. Load switching can cause abnormal contact wear and
premature contact failure. Switching of inductive loads
(strike) also causes EMI (electromagnetic interference),
which may interfere with normal operation of other
equipment. To minimize premature contact failure and
to increase system reliability, a contact protection circuit
may be used.
The following circuit is recommended. Locate the protection
circuit as close to the load as possible (within 12 inches
if it is located far away.
ADC-ACX1 Installation Guide | 7
1K,1%
1K,1%
1K,1%
1K,1%
IN1 IN2 IN3 IN4
Standard Supervised Circuit,
Normally Closed Contact
Standard Supervised Circuit,
Normally Open Contact
Unsupervised Circuit,
Normally Open Contact
Unsupervised Circuit,
Normally Closed Contact
Input Wiring
There are 8 inputs that are typically used to monitor door
position or request to exit devices. Input circuits can be
or closed contact, open circuit, shorted circuit, grounded
circuit *, or foreign voltage*.
A supervised input circuit requires adding two resistors
with value of 1k ohm, 1% to the circuit to facilitate proper
reporting and should be located as close to the sensor as
possible.
* Grounded and foreign voltage states are not a requirement of UL 294
but may not be typical.
22 AWG minimum required for input wiring. 18 AWG
recommended if wiring request-to-exit devices in series
with locking hardware.
8| Single Reader Expansion Module
Specifications
The Expansion Module is for use in low voltage,
class 2 circuits only.
INPUT POWER
12/24V DC, 150mA max.
110mA nominal @ 12V
60mA nominal @ 24V
OUTPUT POWER
Input voltage pass-through
COMMUNICATION
2-Wire RS-485
INPUTS
One dedicated reader input
Two programmable inputs
One dedicated tamper input
OUTPUTS
Two relay outputs (5A @ 30V DC, 1A @ 30V DC)
Single-wire LED control
Single-wire buzzer output
CERTIFICATIONS
CE compliant
RoHS
2.75 x 4.25 x 1.0” (70 x 108 x 25.4 mm)
TEMPERATURE
-40 – 167°F (-40 – 75°C) operational
-67 – 185°F (-55 – 85°C) storage
0-95% (non-condensing) RH
Mercury Security warrants the product is free from defects in material and workmanship under
normal use and service with proper maintenance for one year from the date of factory shipment.
Mercury Security assumes no responsibility for products damaged by improper handling or
installation. This warranty is limited to the repair or replacement of the defective unit.
There are no expressed warranties other than set forth herein. Mercury Security does not
make, nor intends, nor does it authorize any agent or representative to make any other
warranties, or implied warranties, and expressly excludes and disclaims all implied warranties
Returns must be accompanied by a Return Material Authorization (RMA) number obtained
from customer service, and prepaid postage and insurance.
The Interface should only be used to control exits from areas where an alternative method for
exit is available. This product is not intended for, nor is rated for operation in life-critical control
applications. Mercury Security is not liable under any circumstances for loss or damage caused
by or partially caused by the misapplication or malfunction of the product. Mercury Security’s
liability does not extend beyond the purchase price of the product.
This device complies with part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired operation.
© 2018 Alarm.com. All rights reserved.
8281 Greensboro Drive, Suite 100
Tysons, VA 22102 180207
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