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OS32C
User’s Manual
Introduction
E
Wiring Connections
Do not connect the OS32C to a power supply with more than 24VDC + 25% / -30%. Do not supply
AC power to the OS32C, this may result in electrical shock.
For the OS32C to meet IEC 61496-1 and UL 508, its DC power supply unit must satisfy all of the
following conditions:
•Within rated line voltage (24 VDC +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 defined in
UL508.
•Power supply complying with regulations and standards of EMC and safety of electrical equipment in a
country or a region where OS32C is used. (Example: In EU, a power supply must comply with EMC
directives for low-voltage)
To prevent electrical shock, use double-insulation or reinforced insulation from hazardous voltage
(such as 230 VAC).
Cable extensions must be within the specified lengths, otherwise it may result in a failure of the
safety functions.
To use this product for a category 3 safety system, both safety outputs must be connected to the
safety system. Configuring a safety system with only one safety output may result in serious
injuries due to output circuit fault and a failure of the machine to stop.
Protection of Cable at Installation:
Care should be taken when installing the OS32C cable. The cable must be properly routed and
secured to ensure that damage does not occur.
Functional Earth:
The OS32C system requires a functional earth connection.
Do not connect Functional Earth to a positive ground system. If it is connected to positive ground,
the guarded machine to be controlled may NOT stop, resulting in severe operator injury.
Signal Connector Isolation:
The connectors used during installation must
provide sufficient signal separation in order to
prevent a short circuit condition of the input power and system signals.
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