一种带断线检测功能的开关量输出电路由总线控制电路、开关CBB电路、过流检测与保护电路、在线断线检测电路、离线断线检测电路组成。总线控制电路控制开关模块,对电路内部测试点检测回采输出;开关CBB电路产生开关信号并驱动负载;过流...一种带断线检测功能的开关量输出电路由总线控制电路、开关CBB电路、过流检测与保护电路、在线断线检测电路、离线断线检测电路组成。总线控制电路控制开关模块,对电路内部测试点检测回采输出;开关CBB电路产生开关信号并驱动负载;过流检测与过流保护电路通过调整限流电阻控制电流大小;在线断线检测电路由电流型放大器和限流电阻完成检测;离线断线检测电路用来检测负载是否连接。该电路用于控制电磁线圈的通断电状态,能在恶劣的环境下稳定地运行,具有重要的工程实际应用价值。A switch output circuit with wire breakage detection function consists of a bus control circuit, a switch CBB circuit, an overcurrent detection and protection circuit, an online wire breakage detection circuit, and an offline wire breakage detection circuit. The bus control circuit controls the switch module to detect and extract output from internal test points in the circuit. The switch CBB circuit generates a switch signal and drives the load. The overcurrent detection and overcurrent protection circuit controls the current magnitude by adjusting the current limiting resistor. The online wire breakage detection circuit is completed by a current-type amplifier and a current-limiting resistor for detection. The offline wire breakage detection circuit is used to detect whether the load is connected. This circuit is used to control the on/off state of electromagnetic coils, which can operate stably in harsh environments, with important practical engineering application value.展开更多
文摘一种带断线检测功能的开关量输出电路由总线控制电路、开关CBB电路、过流检测与保护电路、在线断线检测电路、离线断线检测电路组成。总线控制电路控制开关模块,对电路内部测试点检测回采输出;开关CBB电路产生开关信号并驱动负载;过流检测与过流保护电路通过调整限流电阻控制电流大小;在线断线检测电路由电流型放大器和限流电阻完成检测;离线断线检测电路用来检测负载是否连接。该电路用于控制电磁线圈的通断电状态,能在恶劣的环境下稳定地运行,具有重要的工程实际应用价值。A switch output circuit with wire breakage detection function consists of a bus control circuit, a switch CBB circuit, an overcurrent detection and protection circuit, an online wire breakage detection circuit, and an offline wire breakage detection circuit. The bus control circuit controls the switch module to detect and extract output from internal test points in the circuit. The switch CBB circuit generates a switch signal and drives the load. The overcurrent detection and overcurrent protection circuit controls the current magnitude by adjusting the current limiting resistor. The online wire breakage detection circuit is completed by a current-type amplifier and a current-limiting resistor for detection. The offline wire breakage detection circuit is used to detect whether the load is connected. This circuit is used to control the on/off state of electromagnetic coils, which can operate stably in harsh environments, with important practical engineering application value.
