Two Reader Expansion Module (ADC-ACX2) - Installation Guide

Connections

Jumpers

Wiring an ADC-ACX2 for communication and power

If the input voltage to the ADC-ACX2 is 12v DC, jumper J2 MUST be in the PT position. Alternatively, if the input voltage to the ADC-ACX2 is 24v DC, jumper J2 MUST be in the 12v position to avoid damaging your reader devices as most access control readers have a power input rating of 5-16v DC. 

Wiring multiple expansions for communication and power

While the pictured examples show how to wire an ADC-ACX2 expansion to a Door Controller (ADC-ACC1-17), LP1501 PoE Door Controller (ADC-AC-LP1501), or LP1502 Door Controller (ADC-AC-LP1502), multiple ADC-ACX1 or ADC-ACX2 expansion boards may be used as long as you do not exceed eight total expansions per controller.

Additionally, when using multiple expansions you will need to also address them accordingly. For more information, see Which address jumpers need to be installed on the Single Reader Expansion Module (ADC-ACX1)? or Which address DIP switches need to be installed on the ADC-ACX2?.

ADC-ACC1-17 / ADC-AC-LP1501

ADC-AC-LP1502

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.

Install jumpers according to the selected configuration.

J2 - Reader port power select

If the input voltage to the ADC-ACX2 is 12V DC, jumper J2 MUST be in the PT position.

Reader wiring diagrams

Typical DC Door Strike wiring

An electrified door strike replaces a traditional door strike for an Access Control system. Door strikes are predominantly Fail-Secure devices, meaning the door remains secure in the event power is removed. This hardware should be wired as Normally Open using an NO terminal as indicated on Fail-Secure wiring diagram below. This is because entry through the door is only granted when the controller is signaled to close the circuit which energizes the strike and allows entry.

Door lock mechanisms can generate EMF feedback to the relay circuit that can cause damage and premature failure of the relay. For this reason, it is recommended that either a diode or MOV (metal oxide varistor) be used to protect the relay. The wire should be of sufficient gauge to avoid voltage loss.

Typical Maglock wiring

An electromagnetic lock or maglock is a is an electromagnet which mounts on a door frame, with a steel armature mounted on the door. Maglocks are Fail-Safe only devices. This means that when power is removed or in the event of a fire alarm input (FAI) signal the maglock unlocks the door as required by code. This hardware should be wired as Normally Closed using an NC terminal as indicated on the Fail-Safe diagram below. This is because constant flowing power is required to keep the maglock energized to secure the door.

Input power

12/24V DC, 550mA max

450mA nominal @ 12V

270mA nominal @ 24V

Output power

12V DC, 125 mA per reader

Communication

2-Wire RS-485

Inputs

Two dedicated reader inputs

Eight programmable inputs

One dedicated tamper input

One dedicated power monitor input

Outputs

Six relay outputs (5A @ 28V DC)

Single-wire LED control

Single-wire buzzer output

Certifications

UL 294 recognized

CE compliant

RoHS

Dimensions (L X W X H )

6.0 x 8.0 x 1.0” (152 x 203 x 25 mm)

Temperature

-40 – 167°F (-40 – 75°C) operational

-67 – 185°F (-55 – 85°C) storage

Operating humidity

0-95% (non-condensing) RH

Warranty

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 of merchantability or fitness for a particular purpose.

Returns must be accompanied by a Return Material Authorization (RMA) number obtained from customer service, and prepaid postage and insurance.

Liability

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.