ISO 7240-18:2017规定了连接到火灾探测和报警系统传输路径的输入/输出设备的要求、测试方法和性能标准，用于接收和/或从传输路径发送信号，这是火灾探测和火灾报警系统和/或消防系统运行所必需的。 输入/输出设备可以是物理上独立的设备，也可以将其功能集成到另一个设备中，在这种情况下，可以使用ISO 7240-18:2017来评估该功能。 ISO 7240-18:2017适用于输入/输出设备，包括单独外壳中的信号放大器和信号传输。 ISO 7240不包括控制和指示设备以及辅助控制和指示设备（例如中继器面板和消防队面板）- 18:2017.

ISO 7240-18:2017 specifies requirements, test methods and performance criteria for input/output devices connected to a transmission path of a fire detection and alarm system used to receive and/or transmit signals to or from the transmission path, necessary for the operation of the fire detection and fire alarm system and/or fire protection system. An input/output device can be a physically separate device or its function can be integrated into another device, in which case ISO 7240-18:2017 can be used to assess this function. ISO 7240-18:2017 is applicable to input/output devices which include signal amplifiers and signal transfer in separate enclosures. Control and indicating equipment and ancillary control and indicating equipment (e.g. repeater panels and fire brigade panels) are not covered by ISO 7240-18:2017.