Sterlco SGBD Series Batch Gravimetric Blenders - Manual (Page 78)

BLN1-600A Chapter 5: Maintenance 78 of 116
5-3 Corrective Maintenance
Electrical
This section is designed to give the operator an overview of the electrical system that controls
the Batch blending system. Since the blender’s control panel is a self-contained pluggable
item, seldom will a maintenance person be required to enter the control panel. For purposes
of understanding the system, it is advisable that the maintenance personnel be familiar with
not only the internal workings of the control panel, but also with the input and output signals
to the Batch blender.
This section includes the following:
• Internal components of the control panel
• Input signal to the control panel
• Output signals from the control panel
Internal Components of the Control Panel
This section describes the internal components of the Batch blending system control panel. It
is not the intent of this section to completely familiarize the reader with the details on
industrial control panel construction or standards, but simply to familiarize the reader with
the major components inside the control panel.
The customer must supply 120-240/1/60 or 110-220/1/50 voltage via wires L1 & L2 (N).
Please insure that the earth ground connection is properly connected to an established earth
ground.
• “Power on” is indicated by a lighted on/off selector switch.
• “Slide gate below mixer” switch controls position of optional slide gate.
• “Safety Active” light displays status of safety interlock circuit.
• Audible alarm horn alerts operator to blender fault.
• See Installation Packet supplied with unit for complete electrical schematics.