所有功能可于前面板，可远程控制，通过其中的接口。
All functions available on the front panel can be controlled remotely through one of these interfaces.
自诊断功能简化了主要职能内部检查，维修，可在前面板上进行。
Self-diagnostic function simplifies maintenance Internal checks of main functions can be performed at the front panel.
l具有报警及监控功能，前面板led显示主要报警及监控信号。
Alarming and monitoring functions, which could be displayed by LED in front panel.
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