Sanyo SUPER BL P5 Manual page 38

2. FUNCTION, CHARACTERISTICS AND CONFIGURATION
Differences Between PY2 Amplifier and Sanyo Denki's Conventional Models and
Precautions
•
No fuse is built into the main power supply input section.
On our conventional PY, PZ, PE and PU models, fuses are built into the main power supply input
sections to save wiring and other reasons when a single axis is used. On the PY2 amplifier, however,
no fuse is built in since use of multiple axes is assumed and downsizing is the main theme of its
development.
(No fuse is built into the PV amplifier, one of our conventional models, as with the PY2.)
In order to protect the main power supply input section from overcurrent, connect a UL-approved circuit
breaker and a fast-blown fuse to the amplifier input section before operation.
•
Fewer noise filters on the main and control power supply input sections
The number of noise filters has been reduced on the PY2 amplifier than on our conventional PY, PZ,
PE, PV and PU models. Noiseproofing, however, is the same as that on conventional models thanks
to improved internal circuits.
Although noiseproofing does not differ, after Sanyo Denki's conventional amplifier in your system is
replaced with the PY2 amplifier, power supply noise which had been absorbed by the noise filters
inside the conventional amplifier may affect other peripherals. So, it is recommended that you attach
noise filters to the power supply (200 VAC).
•
No regenerative resistor is built in. (The 50 A type amplifier normally has one built-in.)
On our conventional PY, PZ, PE, PV and PU models, regenerative resistors are built in (the power
absorbed differs depending on the model and the capacity).
On the "PY2A015*" and "PY2A030*" types, no regenerative resistor is built in.
(They incorporate regenerative processing circuits only.)
Externally connect regenerative resistors to systems requiring regenerative processing.
If no regenerative resistor is externally connected, it takes about five minutes to discharge the
capacitor after the main circuit power is turned off. Before maintaining the amplifier, make sure that
the "CHARGE" lamp on the front of the amplifier indicates that it has been discharged.
•
The dynamic braking methods differ.
On the PY2 amplifier, the slowing-down revolution angle at the time of stopping by dynamic braking is
twice that of the PY, PZ and PE models in the worst case.
(The angle is the same between the PV and PY2. No dynamic brake is built into the PU model.)
•
The forcible air cooling method is adopted for cooling power modules
(for the 30 A and 50 A types only).
On the "PY2A030*" and "PY2A050*" types, the forcible air cooling method is adopted to enable down
sizing and long life. So, the Servo Amplifier does not stop functioning even after the cooling fan stops
due to failure. To ensure long operation of the amplifier, check the motion of the fan during regular
inspection.
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