Datasheet
CD5.243
CD-Series 
DC/DC Converter 24V, 4A 
14. PROTECTION FEATURES 
Output protection  Electronically protected against overload, no-load and short-circuits 
*) 
Output over-voltage protection typ. 31Vdc 
max. 32Vdc 
in case of an internal power supply defect, a redundant 
circuit limits the maximum output voltage. The output 
shuts down and automatically attempts to restart. 
Reverse input polarity protection  Included  unit does not start when input voltage is reversed 
Output over-current protection electronically limited *) see Fig. 5-1 
Degree of protection  IP 20  EN/IEC 60529 
Penetration protection  > 3.5mm  e.g. screws, small parts 
Over-temperature protection  yes  output shut-down with automatic restart 
Input transient protection  MOV  Metal Oxide Varistor 
Internal input fuse  Included  not user replaceable 
*)  In case of a protection event, audible noise may occur. 
15. SAFETY FEATURES 
Classification of output voltage  SELV  IEC/EN 60950-1 
  PELV  IEC/EN 60204-1, EN 50178, IEC 62477-1, IEC 60364-4-41 
Class of protection  III  PE (Protective Earth) connection not required. A 
connection of the “Chassis Ground” pin to earth is 
recommended for best EMI performance 
Isolation resistance  > 5MOhm  input to output, 500Vdc 
PE resistance  < 0.1Ohm  between housing and Chassis Ground terminal 
Touch current (leakage current)  The leakage current which is produced by the DC/DC converter itself depends on the 
input voltage ripple and need to be investigated in the final application. 
For a smooth DC input voltage, the produced leakage current is less than 100μA. 
*)  provided, that the input voltage meets the requirements of chapter 2. 
Mar. 2016 / Rev. 1.3 DS-CD5.243-EN 
All parameters are specified at 24V, 4A, 12Vdc input voltage, 25°C ambient and after a 5 minutes run-in time unless otherwise noted. 
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