Weidmüller has added four versions to its Microopto family of opto-couplers or solid-state relays designed for applications, including switching and amplifying actuators, signal inversion and converting TTL signals. They offer extremely fast response time, reliability, compact size and low power use. The four products are Microopto Solenoid, Microopto 1CO and two Microopto TTL converter devices. All are CE- and cULus-approved.