Basic Single-Door Access Control System Secures Conference Room

Components installed includes a standalone keypad, electrified mortise lock, power supply and power transfer butt hinge.


Because the Camden CM-8PS keypad operates using 12VDC, the mortise lock was ordered using a 12 Volt solenoid configured to Fail Secure. This 12 volt solenoid current draw is approximately 750 mA (0.75 Amp). This plus the 0.1 Amp power required for the Camden CM-8PS necessitates at a minimum a one Amp power supply.

Note: It is never a good idea to under-power a solenoid-based access control system.

To configure the mortise lock to Fail Secure operation, the metal pin must be in pin hole “A”. To set the function to Fail Secure, the cover must be removed from the mortise body. Once the four Phillips Head screws were removed, check to see if the pin is in the correct hole. If not, the metal pin can be lifted out of the “B” pin hole using a magnet or magnetic screwdriver and inserted into the “A” pin hole.

The handing of the mortise lock can be reversed without opening the mortise body. Two steps are required. First, locate the handing screw that is located below the hub and towards the rear of the mortise case. This Phillips Head screw is removed from one side of the case and installed into the same hole on the other side of the mortise case. The second step is to hand the latchbolt. If necessary, remove the faceplate. Then pull out on the latchbolt and rotate it 180 degrees. The latchbolt will retract back into the mortise case slightly. Test the operation of the lock. The ML180 will allow the hub on one side of the case to rotate freely (interior for egress) and the other only when the solenoid is energized or when the proper key is operating the mortise cylinder.

A minimum of one Amp of power is required to power is necessary to operate this access control system. Although the lock and the self-contained keypad together only need .85 Amps, it is a good idea to have some extra power. This could be necessary if the power supply is mounted in a different room or if the system hiccups. Having a power buffer helps ensure proper operation.

POWER SUPPLY

For this installation, the Altronix 125ULX Power Supply was chosen. This Class 2 rated one Amp power supply can be configured with battery backup. The 12VAC or 24VDC outputs are filtered and regulated. There is a supervised Fire Alarm Disconnect. Although not needed for this application, the Altronix 125ULX has an auxiliary relay output. In addition, this Altronix power supply has short circuit and thermal overload protection. The 125ULX Power Supply is the same as the 125UL except the enclosure is larger.

In order to power the mortise lockset, the non-fire rated wooden interior door must be drilled for a raceway. A raceway provides the ability to run wire or cable from the hinge side of the door to the installed mortise or cylindrical lock. The raceway for this installation is drilled from the center of the middle butt hinge through the width of the door into the rear of the mortise pocket. Because of the glass, the angle drilled will be less than horizontal. For this installation, the raceway drilled through the door is 3/8” diameter with a pocket at the hinge edge to accommodate a wire bundle.

POWER TRANSFER BUTT HINGE

A Command Access ETH2W Power Transfer Butt Hinge with a four-foot two wire lead on one leaf will provide power to the electrified mortise lock. This four-foot lead provided sufficient reach to directly connect with the mortise lock wiring without additional wire. The four-foot lead on the hinge has only one connection, reducing the possible failure points. The jamb leaf wire lead is one foot.

To wire the access control system from the Altronix power supply to the Camden keypad and the keypad to the jamb side of the power transfer butt hinge, Belden Wire jacketed two conductor (black and red) 18 gage stranded cable was used.

The Camden CM-8PS has numbers printed on the circuit board along the three terminal blocks (1-3, 4-9, 10-12). To control the operation of the electrically unlocked mortise lock, the black wire is connected to terminal two (Common) and the red wire is connected to terminal three (Normally Open) of the keypad’s circuit board. The two conductors from the power supply are connected to terminals four and five to supply power for the keypad based access control system.

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