112
Chapter5
OS32C
User’s Manual
Wiring
Power Supply Unit
Do not connect the OS32C voltage lines to DC power supplies with more than 30V or less than 16.8 V. In
addition, the OS32C should not be connected to AC voltages. Either of the above will result in electrical shock
or product malfunction.
For OS32C to meet IEC 61496-1 and UL508, its DC power supply unit must satisfy all of the following
conditions:
•Line voltage rated within (24VDC +25%/-30%)
•Complying with EMC directives (industrial environments)
•Double-insulation or reinforced insulation between primary and secondary circuits
•Automatic return for overcurrent protection
•Output retention time of 20 ms or longer
•Satisfying output characteristics requirements of Class 2 circuit or limited voltage/current circuit define in
UL508.
•Power supply complying with regulations and standards of EMC and safety of electrical equipment in a
country or a region where the OS32C is used. (Example: In EU, a power supply must comply with EMC
directives for low-voltage)
To prevent an electrical shock, use double-insulation or reinforced insulation from hazardous voltage (such as
AC230V).
Cable extension must be within a specified length. Otherwise it may result in a failure of the safety functions.
The OS32C can be operated directly using 24VDC +25%/-30%. Operation power of the OS32C must be
supplied from dedicated power source. The power source must comply with requirements of IEC 60204-1 and
IEC 61496-1.
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