According to Annex A, position sensors include edge sensors, gate arm limit switches, and contact switches. Position sensors can also be used for other applications such as relocking, arming, and disarming of an intrusion detection system and other approved control functions.

The integration of the access control system should never compromise the primary objectives of the access control system. The use of an access control system in integration with an intrusion detection system should never create false alarms from the system not being properly disarmed prior to entry.

Below is a sample of NFPA 731. For the complete section, see the actual NFPA 731 text at NFPA.ORG. Once there, click on the free access link to the latest edition of NFPA 731.

6.1.6 Position Sensor.

6.1.6.1 Where required, a position sensor shall monitor the position of the portal for held-open or forced-open conditions.

6.1.6.2 The position sensor shall be mounted such that no portion of the portal opening is greater than 152.4 mm (6 in.) before the sensor is activated.

6.1.6.3 Position sensors shall be monitored as applicable by the head-end controller or an integrated intrusion detection system so as to notify the system users of an event.