The following types of digital input/output modules are available in ProSafe-RS:
• SDV144 : Non-voltage contact input, 16 channels, module isolation
• SDV521 : 24 V DC output, 4 channels, module isolation
• SDV526 : 100-120 V AC output, 4 channels, module isolation
• SDV531 : 24 V DC output, 8 channels, module isolation
There is a different behavior between SDV531-S13 and SDV531-S23/-S33 as follows when a short circuit occurs on the field side:
• SDV531-S13
When short-circuit occurs on the field side, the Output Shutoff Switch is activated and the output of all channels on the module becomes OFF. When the short-circuit error is resolved, the outputs can be recovered by starting the output module from the SCS Status Management Window and performing the Output Enable Operation. Then the recovered output channels will output the application logic values. Without performing
the Output Enable Operation, all the outputs will be kept OFF.
SDV531-S23/-S33：
When short-circuit occurs on the field side, the output of output channel corresponding to that field device becomes OFF. When the short-circuit error is resolved, the output channel can be recovered by performing the Output Enable Operation. Recovered channel will output the application logic values. Without performing the Output Enable Operation, this channel will output the fail-safe value.
• SDV531-L : 24 V DC output, 8 channels, module isolation, long distance type
• SDV53A : 48 V DC output, 8 channels, module isolation
• SDV541 : 24 V DC output, 16 channels, module isolation
sales7@amikon.cn 
86-18965423501 
86-18965423501
AMKPLC 
