Can you be sure it’s a safe speed?
The UH6932 and UH6937 are the latest additions to the Dold Safemaster S series of speed monitoring safety relay products. These economical, compact 45mm wide devices offer user-friendly digital setup via front mounted pushbuttons and LCD display. Both devices are independently certified by TUV to PLe, SIL3 and are certified respectively for safe use in the functional safety of motor systems (EN 61800-5-2) and electrical drive systems (EN 61809-5-2)
The UH5932 accepts two digital sensor inputs, typically from PNP or NPN proximity sensors and has up to four independent set points for speed monitoring and or standstill. The UH5937 does not require sensors; it directly monitors the output frequency of inverter drives and has up to four independent set points for under and over speed monitoring. Both units offer comprehensive diagnostic indication, they can be muted via external signals and have safety relay and analogue outputs for the set points and actual speed or frequency.
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