Sterling A0567659 Benutzerhandbuch

 

 

Safety circuits used in industrial systems protect the operator and 
maintenance personnel from dangerous energy. They also provide a 
means of locking out or isolating the energy for servicing equipment. 

 

Various agencies have contributed to the establishment of safety 
standards that apply to the design and the manufacture of automated 
equipment. The Occupational Safety and Health Administration (OSHA) 
and the Joint Industrial Council (JIC) are just a few of the organizations 
that have joined with the plastics industry to develop safety standards. 

 

Every effort has been made to incorporate these standards into the 
design of the SGB blending system; however, it is the responsibility of 
the personnel operating and maintaining the equipment to familiarize 
themselves with the safety procedures and the proper use of any safety 
devices. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

If a safety device or circuit should fail, the design must be such that the 
failure causes a “Safe” condition. As an example, a safety switch must 
be a normally open switch. The switch must be held closed with the 
device it is to protect. If the switch fails, it will go to the open condition, 
tripping out the safety circuit. 

 

At no time should the safety device fail and allow the operation to 
continue. For example, if a safety switch is guarding a motor, and the 
safety switch fails, the motor should not be able to run. 

        

 

Some safety devices disconnect electrical energy from a circuit. The 
safety devices that are utilized on Sterling SGB models are primarily 
concerned with the pneumatics and electrical power disconnection, and 
the disabling of moving parts that may need to be accessed during the