描述
节点总线的传送介质一般为同轴电缆,有的采用令牌信号传送方式,有的采用带冲突检测的确良多路送取争用总线信号传送方式。不论采用哪种方式,当总线的干线任一处中断时,都会导致该总线上所有站及其子设备通讯故障。
Honeywell ISSC 621-9939 Serial Link Module 6219939
Honeywell Issc Ssec Rack 621-9990 USED Free Shipping
One-day shipping available
Honeywell Issc Input Card 330-115A 330115A USED
One-day shipping available
Honeywell ISSC 620-3033 Processor Module 620-30 6203033
Honeywell ISSC 621-2100R 6212100R Output Module GOOD!
Honeywell Issc Ssec Rack 620-1690 6201690 Used *
One-day shipping available