Gate closing timer for security gate override system

A timer override device for a lock box on a security gate for automatically closing a security gate after a preset time with the device activated by an emergency personnel key opening the security gate to admit emergency vehicles through the gate, the device comprising:

• a timer adapted to fit inside of a control box for a security gate, the timer comprising a first pair of electrical connectors from the timer attachable across a pair of terminals for an emergency personnel key circuit on a PC board housed in a control box for controlling a security gate, a second pair of electrical connectors from the timer attachable to a remote emergency personnel key switch, the timer adapted to start a pre-programmed timed cycle in the timer in response to a turning of an emergency personnel key in the remote emergency personnel key switch and after a preset time the timer is adapted to open a circuit between the pair of terminals for an emergency personnel key circuit to close a security gate allowing the device to resume normal operation independently of an emergency personnel key, the timer adapted to fit within a control box for a security gate along with a PC board for controlling an emergency gate, the timer having a power source, the timer adapted to open and close a circuit between the pair of terminals without imparting power from the timer to the terminals.