The PCH 1220 Electronic Vibration Switch provides basic, reliable protection of rotating machinery at a low cost.
- Low-cost machine protection
- Accurate, reliable alarm measurements
- Automatic alarm reset
- Simple installation with preset alarm limits
Electronic vibration switch vs. mechanical vibration switch
An electronic vibration switch has no moving parts that can become stuck. The electronic signal is also more accurate and has a higher degree of repeatability than a mechanical switch.
In choosing an electronic vibration switch such as the PCH 1220, you are opting for the more reliable – and hence safer – solution.
- Frequency range: 10 to 1,000 Hz
- Alarm levels: custom setup
- Signal detection: RMS
- Measuring parameter: velocity mm/s
- Outputs: 1 alarm relay with default trip at 7.5 mm/s
- Compliance: IP 66/68
The PCH 1220 vibration switch is suitable for basic monitoring of rotating machinery such as fans, blowers, and pumps.
PCH 1220 monitors machine vibration within a 10-1000 Hz (ISO 10816-3/20816-3) frequency band and compares the value to the preset alarm threshold.
If the alarm limit is exceeded, the alarm is triggered.
The alarm automatically resets when the vibration level drops below the preset alarm limit.
Preset alarm limits
The vibration alarm is preset at delivery, simplifying the installation, and it comes with a delay time of 5 seconds.
The sensor is supplied in stainless steel 1.405 housing with an integrated M8 mounting stud and an M12 top exit connector.
The vibration switch can be fitted with a high temperature adaptor suitable for 90° C radiation.
Cables and connectors
Various cable and connector combinations are available for the PCH 1220 vibration switch. Choose between:
M 12 connector with cable lengths:
- 1500 mm
- 3000 mm
- 5000 mm
- 10,000 mm
M12 90 ° C connector with cable lengths:
The alarm threshold is factory preset according to your specifications, e.g., 3.2, 7.5, 9.6, 17, 36 or 47 mm/s.
The vibration switch complies with ISO 10816-3/20816-3 standards.
It has an IP rating of 66/68.