Add to favorites

#Product Trends

Safety-oriented incremental rotary encoder

The solution doesn't always have to be a big one. An incremental rotary encoder is sufficient for the safe detection of speed, direction of rotation or standstill. The use of certified components considerably facilitates validation of the complete application. TR-Electronic therefore offers the safety-certified incremental rotary encoder IE58+FS. The user can choose between square-wave signals (with TTL or HTL level) and sine-cosine interface. The rotary encoder is certified for applications with SIL 2 or PLd. The rotary encoder permits the operating modes SLS, SOS SSR, SDI and SSM in conjunction with an appropriate safety module. With a sine-cosine interface, SIL3 or PLe is also possible for specific safety functions. This is partly due to the fact that the transmission channel can be checked by means of a simple calculation from the signal: The following must apply at any time: Sin²(t)+Cos²(t) = 1. If the calculated value differs, the safety module can go into a safe status. Another component of this high safety classification is the simple design with proven optical scanning with fixed resolution on the glass disk. 1024, 2048 and 4096 periods per revolution and a zero pulse may be selected. The signal paths are designed differentially. As a result the signal is immune to disturbance and failure of a driver can be reliably detected. The incremental rotary encoder is connected to the driving axis either with a solid shaft, blind shaft (IS58+FS) or a hollow shaft (IH58+FS). The form closure necessary for reliable measurement is implemented through a groove in the shaft - in the case of solid-shaft rotary encoders the appropriate spring is included in the scope of supply.

To fulfill the safety functions, the safety-oriented incremental rotary encoder IE58+FS is connected to a safety module available on the market, which then performs the relevant inspection. For the development and certification of the IE58+FS, modules from different manufacturers have been examined and compatibility with the IE58+FS established. The IE58+FS supplement the series of safety-oriented products with integrated safety (CD_75) with an important component for a modular safety concept, which allows the user to select the required evaluation module according to his or her own requirements.

Details

  • TR-Electronic GmbH

    Keywords