求翻译：数字量输出模块输出类型一般有交流输出模块和直流输出两种。实例中一般采用输入直流输出模块，输出回路的控制均通过驱动直流负载的小型继电器来控制电磁阀等转换成压缩空气信号对现场阀门进行控制，以使控制回路达到氢气防爆要求。是什么意思？

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digital output module output types have a general exchange output module and DC output. Generally used in examples input DC output module, the output loop drive through the control of the DC load small relays to control solenoid valves converted signals compressed air valves for control of the scene

Digital output module output type AC and DC output module output in two ways. Generally use the input DC output module in the instance, output circuit controlled by driven DC load device of relays to control solenoid valves and other converted to a compressed air valve control signal on the field, t