Pressure Switch
Pressure switch, abbreviated as PS, provides a discrete input to the PLC. The pressure switch is typically used as a method of control in tanks, vessels and over all process control.
Note that a pressure switch is different than a pressure transmitter in that a pressure switches sole function is to provide a binary TRUE or FALSE into the PLC. This approach simplifies programming.
instrument abbreviations
Pressure Switch Types
- Mechanical Deflection
- Piston
- Strain Gauge
- Semiconductor Piezoresistive
- Piezoelectric
- Thin Film
- Variable Capacitance
Configuration and Alarms
Configuration (Normal State):
- NO - Normally Open
- NC - Normally Closed
Alarms in the PLC can be:
- PSH - Pressure Switch High
- PSL - Pressure Switch Low
- PSHL - Pressure Switch High/Low