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SGB Batch Blender with Mitsubishi Controller Page 83 of 118
6-6-4 Output Signals from Programmable Controller
The SGB blending system uses several output control signals to control
the process. All of these are very similar in nature, the first of which is the
mixer motor control.
The mixer motor is controlled by a PLC output.
The weigh hopper dump valve output functions similar to the mix motor
output. Please refer back to the wiring diagram. The origin of the weigh
hopper dump signal is a PLC output.
Each SGB blending system includes an auxiliary customer alarm output.
This dry contact can be used to switch a remote alarm signal.
The customer alarm output is provided to actuate or energize a variety of
alarm horns, buzzers, strobe lights, and beacons. These are normally
provided by the customer, and care will have to be exercised not to
exceed the maximum current draw (3 amp maximum). The contacts will
close whenever the control detects a fault that will somehow inhibit the
blending system from properly blending the material.
Note: The customer alarm contact is open if the panel control power is
turned off.
This contact is for use with a customer supplied alarm device as
described above.
The alarm contact has a maximum load of 3 amps.