描述
PLC输出电路中没有保护，因此在外部电路中应设置串联熔断器等保护装置，以防止负载短路造成PLC损坏。熔断器容量一般为0.5A。PLC存在I/O响应延迟问题，因此在快速响应设备中应加以注意。MPI通信协议虽简单易行，但响应速度较慢。编制控制程序时，最好用模块式结构程序。这样既可增强程序的可读性，方便调试和维护工作；又能使数据库结构统一，方便WinCC组态时变量标签的统一编制和设备状态的统一显示。
ALLEN BRADLEY SERVO DRIVE 2098-DSD-075-SE
Allen Bradley Ultra 3000i Servo PLC 2098-DSO-HV100X-DN
Allen Bradley Ultra 3000i Servo PLC 2098-DSO-HV100X-DN
Allen Bradley Ultra 3000 Drive 2098-DSD-HV100-SE NEW
ALLEN BRADLEY 2098-DSD-075-SE ULTRA *FACTORY SEALED*
Allen-Bradley Ultra3000 Drives 7.5Kw 2098-DSD-075-SE
ALLEN BRADLEY SERVO DRIVE 2098-IPD-010
ALLEN BRADLEY 2098-IPD-010 USPP 2098IPD010
ALLEN BRADLEY AC DRIVE ULTRA 3000i 2098-DSD-075X
ALLEN BRADLEY 2098-DSD-HV150-SE USPP 2098DSDHV150SE
ALLEN BRADLEY 2098-IPD-020 USPP 2098IPD020
ALLEN BRADLEY SERVO DRIVE 2098-DSD-020X-DN
Allen Bradley AB 2098-IPD-005 /A Ultra5000 Servo Drive
