SMC Sensor Err: SMC PSE200/PSE201 Error Code Sensor Err

Symptoms

The SMC PSE200/PSE201 pressure sensor controller displays a sensor error indicating the sensor is not connected or is wired incorrectly. The controller cannot read pressure because the sensor signal is absent or invalid. The pneumatic system may not maintain proper pressure control without sensor feedback.

Possible Causes

Pressure sensor not physically connected to the controller input
Sensor wiring open circuit (broken wire or disconnected terminal)
Sensor connected to wrong input channel (miswiring)
Sensor internal failure producing no output signal

Troubleshooting Steps

Step 1: Check controller display for sensor error indication on affected channel
Sensor error displayed on specific channel number
Step 2: Verify sensor is physically connected to the correct controller input channel
Sensor connector fully inserted and locked at correct channel
Step 3: Inspect sensor wiring for breaks, cuts, or loose connections
Wiring continuous from sensor to controller terminals
Step 4: Measure sensor output voltage/current to verify signal is present
Sensor produces valid output signal proportional to applied pressure

How to Reset

To reset: 1) Reconnect or repair the sensor wiring. 2) If error persists, replace the pressure sensor. 3) Power cycle the controller to clear the error. Caution: Verify correct wiring before applying power to prevent damage.

Common Replacement Parts

PSE200-Series Sensor: SMC Pressure Sensor for PSE200 Controller (Match pressure range to application requirements)

Frequently Asked Questions

Q: How do I identify which channel has the sensor error?
The PSE200/PSE201 display shows the channel number with the error. Each channel monitors one sensor. Check the display to identify the affected channel.
Q: Can I run the pneumatic system without a pressure sensor?
No. The controller requires pressure feedback to maintain proper regulation. Operating without a sensor can cause over-pressure conditions that may damage pneumatic components or create safety hazards.

SMC PSE200/PSE201 Error Code Sensor Err