Sterlco GH-M Series Extrusion Control Weigh Hoppers - Manual (Page 23)

Chapter 2: Functional Description 23 of 60
Pneumatic Slide Gate below surge hopper
The surge hopper can be equipped with a pneumatic slide gate in lieu of the air cylinder and
urethane dump cone. The knife gate is opened and closed by the PLC. A 24 VDC solenoid is
used to open and close the knife gate.
WARNING! Slide gates create a pinch-point hazard
Low Level Proximity Sensors
Detects material supply problems before rate monitor hoppers are empty. A 24VDC
capacitive proximity switch is utilized for this option. The proximity switch is wired directly
into the PLC enclosure. If there is a material supply problem, a visual alarm is activated.
2-5 Safety Features
This section includes information on safety devices and procedures that are inherent to the
rate monitor system. This manual is not intended to supersede or alter safety standards
established by the user of this equipment. Instead, the material contained in this section is
recommended to supplement these procedures in order to provide a safer working
environment.