According to Annex A, examples of readers include magnetic stripe, radio frequency identification (RFID) (long and short range), bar code, keypad, Wiegand, biometrics, and smart cards (contact and contactless), or any other device that provides a unique identity of the card or person. Based on the threat level, systems can employ a single reader or a combination of these devices.

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.

6.1.4 Reader.

6.1.4.1 Readers shall be mounted in accordance with adopted local codes and the requirements of the AHJ.

6.1.4.2 When the portal is a door, readers shall be mounted on the latch side.

Exception: If there are barriers to mounting the reader on the latch side of the door, the reader shall be mounted at the closest location that is not behind the door when it is open.

6.1.4.3 Clearance between the reader and the portal shall be provided to enable the user to initiate the portal action.

6.1.4.4 Access to the readers shall not be obstructed where manual presentation is required.

6.1.4.5 Where manual presentation of access credentials is required for a vehicle, the reader shall be readily accessible from the operator's position of vehicles common to the site.

6.1.4.6 All readers shall provide a visual or audible indication that the credential has been recognized.

6.1.4.7 The maximum interval of time between the recognition of a valid credential and the unlocking of a portal shall not exceed 10 seconds.