In the modern industrial automation, where response times under 1µs are required, a coupling device may be a 'signal brake'. Here the advantages of semiconductor switches are convincing because of their wear-freeness and their high switching speed. It depends not only on the level of the switching frequency, but also on the response time at the output and on the signal quality. In the MICROOPTO family from Weidmüller the devices with high switching frequencies are characterised by start delays of lower than 200 ns. This short response time ensures that the following processes are delayed only marginally by the potential separation. Despite these high switching frequencies MICROOPTOs provide impressive steep switching flanks. These are necessary to ensure the control of downstream logic inputs.
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100 kHz Standard device (MICROOPTO 100 kHz)
A special interior circuit in the opto module MICROOPTO 100 kHz ensures that rapidly transmitted signals are isolated from one another and that they can be transferred practically without delay. This allows switching frequencies up to 100 kHz to be achieved. The application of MICROOPTO 100 kHz in the first place, is the signal adjustment or potential separation between sensors (impulse transmitter) and the measurement and control modules.
Signal adaption of TTL interfaces (MICROOPTO TTL)
To adjust sensitive TTL signals to the typical voltage level of 24 V DC used in industrial automation applications, the MICROOPTO TTL modules are used. For the protection of the electronics, the sensitive TTL signals require electrical isolation from the 24 V world. To control the optical coupler circuit via the 5 V TTL signal, an additional auxiliary voltage is fed in. Thus, for example computer-based measurements and control modules, or printer ports can be integrated easily and safely in the 24 V DC automation.
Electronic change-over
Electronic CO contacts are used anywhere output signals need to be changed over. For this purpose, the input signal is directly switched through to the output side and inverted: as a result, the opto module can also be used as a pure inverter. The advantage over electromechanical relays lies in the wear-free switching and the possibility of realising high switching frequencies.Motor speed reading
(MICROOPTO 100kHz)
Printer Interface
(MICROOPTO TTL)
Inverter
(Change-over)
