Description

Critical rotating machinery is often monitored by vibration sensors. PCH 1275/1277 is suitable for zone 1/21 areas. The Vibration Guards compare the actual vibration level with the internal thresholds 10 times per second and makes it suitable for early warning or even for emergency shutdown of your machinery. Standard ISO 10816(10-1000 Hz) or customized filter ranges can be delivered. PCH1275/PCH1277 is ideal as part of the safety chain for dangerous machinery, where high accuracy and fast response time is important. PCH 1275/1277 complies to Functional Safety (EN13849), PL-d (SIL 2). A frequency response curve follows each calibrated Vibration Guard delivered by PCH Engineering. You can adjust the measuring range, vibration alarm levels, delay and hang times directly in the monitor with no use of PC.

Key Features:

• Measuring parameter: velocity mm/s or acceleration m/s²
• Frequency range: 10 to 1000 Hz or 1 to 30/300 Hz
• 2 alarm levels with individual delay times and 2 alarm relays
• Analog DC output RMS 4-20 mA, proportional to 0-100 %
• Measuring range selectable: 10 to 100 mm/s or m/s² rms
• Self-test function can be activated externally
• Safety level SIL 2 rated, GOST-R certificate, ETL listed upon request
• ATEX version suitable for zone 1 and zone 21
• RS-485 version available as PCH 1277 for communication with PCH user software