6-6 Electrical
6-6-1 Description and Objectives
This section is designed to give the operator an overview of the electrical system that controls the SGB blending system. Since the SGB’s control panel is a
This section includes the following:
•Internal components of the control panel
•Input signal to the control panel
•Output signals from the control panel
This section describes the internal components of the SGB 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 SGB control panel.
The customer must supply 120/1/50 or 60 (or 220/1/50 or 60) 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 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.
6-6-3 Input Signals to Programmable Controller
The SGB blending system has two main input signals that it uses from the blending process: the mix hopper high level signal and the weigh hopper load cells. This, of course, does not include the operator touchscreen input.
The mix hopper high level signal is generated by a proximity level sensor located in the right hand portion of the mixer chamber (viewing from the mixer door).
Load cells require +10 volts DC to operate. This is known as the load cell’s excitation voltage.
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