Safety Interlocking System - Control Techniques Emerson Digistart CS Guide D'utilisation

7.3

Safety interlocking system

The Pump Application Module is not restricted to pumping applications only.
In this example, the Pump Application Module is used on a safety interlock control system.
The low pressure input is directly connected to a limit switch on a general access sliding door. The input activates if the sliding door is
left open, which causes a trip and stops the motor and machine. An initial delay allows the door to open and close for short periods to
allow entry and exit.
The high pressure input is directly connected to a limit switch on an emergency exit door. The input activates immediately if this door is
opened, which causes a trip and stops the motor and machine.
The low water input is directly connected to a safety interlock barrier device. When the device operates, the input activates which
causes a trip and stops the motor and machine.
Figure 7-3 Safety interlocking system application
Emergency exit
High pressure input
Low water input
MACHINE
Safety interlock barrier Mains supply
(eg beam sensor)
Machine
operating
room
MOTOR
Module Soft
starter
Low pressure input
General access
sliding door
Motor supply
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Pump Application Module User Guide
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