AEC OFE Blender - Manual (Page 32)

OFE Series Weight Loss Feeders Page 31
6-5 Electrical
6-5-1 Description and Objectives
This section is designed to give the operator an overview of the electrical system
that controls the OFE Feeder system. Since the 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 unit.
This section includes the following:
• Internal components of the control panel
• Input signal to the control panel
• Output signals from the control panel
6-5-2 Internal Components of the Control Panel
Note: See Section for complete electrical schematics.
This section describes the internal components of the OFE Feeder 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 120/1/50 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.
Audible alarm horn alerts operator to feeder fault.
6-5-3 Input Signals to Programmable Controller
The OFE feeder has two main input signals that it uses from the blending
process: the extruder proximity switch signal and the weigh hopper load cells.
This, of course, does not include the operator touchscreen input.
Load cells require +5 VDC to operate. This is known as the load cell’s excitation
voltage.