Connecting an electric locking device to a keypad/card reader that uses volt free relay terminals.

Relay Terminals :
NO - Normally Open
C - Common
NC - Normaly Closed

	The above diagrams are ONLY suitable if the same power supply is powering both the keypad/card reader AND the locking device.
	Make sure the relay rating is big enough to control your locking device.
	This is a common way of connecting an Access Control systems, however it isn't the only way and manufacturers instructions may differ. Follow 1 set or the other but not both as there may be a conflict.