MTS Series 505 SilentFlo Hydraulic Power Unit Model 505-180 - Manual (Page 22)

Model 505.60 - 505.180 SilentFlo™ HPU 22
Model 505.60 HPU Electrical Control
Introduction
Model 505.60 HPU Electrical Control
The HPU can be controlled locally using the front panel controls, or remotely
through a controller via the J1 connector. A PLC (programmable logic controller)
manages the electrical systems within the HPU. The electrical system includes
the following:
• A user interface panel that contains a touch screen to program preferences
and operational settings. The screens on the user interface panel provide
quick indication of the unit’s condition, including motors status, running
time displays for each motor, hydraulic fluid level and temperature, and
filter condition.
• Wye-delta starting reduces the initial current rush when the motor starters
are engaged.
• Thermal overloads protect the individual HPU motors from excessive
current draw.
• A latchable Emergency Stop button prevents inadvertent starts.
• Interlocks protect the HPU against low hydraulic fluid level,
overtemperature, and dirty filters.
• A Reset button brings the unit back into operation after a fault has been
detected and corrected.
• A dirty filter signal will not shut the unit down, but will prevent the unit
from starting.
• The power disconnect switch on the door of the main electrical enclosure
ensures that power is removed whenever the door is opened. This device is
both an ETL and TÜV-certified, lockable, main-disconnect switch.
Note The electrical schematics for the HPU are located on the following
pages. The difference between the Model 505.60/.90 and Model
505.120-180 is the number of pump assemblies.