Posted on 11/12/2015
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 hig...
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 th...