Weidmüller's solid-state relay MICROOPTO valve switch: switch amplifier for controlling inductive loads

Extremely high 10 A switching capacity at 55 °C - design width of just 6 mm. Error indication through auxiliary contact. Short-circuit proof and equipped with extensive protective circuitry

(PresseBox) (Detmold, ) Weidmüller's new solid-state relays MICROOPTO valve switches serve as switch amplifiers to control inductive loads such as solenoid valves or contactors - up to 24 VDC / 10 A. The modules switch the maximum switching current of 10 A across the full temperature range up to 55 °C - and that being housed in an extremely compact design width of just 6 mm. The MICROOPTO valve switch is ideally suited to be deployed as a switch amplifier downstream of controller outputs or control modules (mostly 24 VDC, 0.1-0.5 A). A current sensor monitors the output for errors such as short circuits and overload. Thanks to the integrated short-circuit protection and extensive protective circuitry, the module is eminently suitable for use in robust applications in industrial environments - in other words, in applications where a long service life and reliability are top priority. When an error occurs, a potential-free signalling contact provides the controls with feedback - the machine can switch to a safe mode and the error can be rectified. Pluggable cross-connectors (ZQV 4N) ensure that connecting the supply voltage is fast and uncomplicated. All housings are sealed to IP20 and are designed to be snapped onto TS35 mounting rails. A green LED indicates that the relay is operating correctly; a red LED provides visual indication of a fault in the output circuit. The MICROOPTO can be utilized in ambient temperatures ranging from -20 °C to + 60 °C.

Electronics modules that are not only equipped with an optocoupler for electrical isolation purposes but also with an additional switch amplifier are generally known as Solid State Relays (SSRs). The new and powerful solid-state relay MICROOPTO valve switch from Weidmüller is designed to switch very high load currents of 10 A in the 5-30 VDC voltage range across the entire ambient temperature range up to 55 °C. They are designed to safely and reliably control inductive loads, such as solenoid valves and contactors in particular. Errors are indicated via an auxiliary contact (5...48VDC / 0.1A), which indicates short-circuits as well as overloads.

Solid state relays offer several advantages in comparison with electro-mechanical relays: they operate extremely reliably over a long service lifespan, they are compact in size, have low drive power requirements and extremely fast response times. SSRs switch loads silently and bounce-free. They are insensitive to shock impact and vibration. And, in addition, they do not subject adjacent component groups to electromagnet emissions or switching sparks during switching operations.

The electronics in Weidmüller's MICROOPTO product range are packaged in an insulated, enclosed housing. The product range is equipped with the characteristics of a terminal block: pluggable cross-connectors (standard ZQV 4N), standardized marker solutions (WS12/6 MultiCard) and minimum design width. Top-drawer performance with minimum real-estate requirements are distinguishing characteristics of these SSRs boasting a design width of just 6 mm, a length of 90 mm and a height of 98 mm. Designed to snap onto DIN TS 35 mounting rails the modules are equipped with clamping yoke (screw) connection technology for conductor cross-sections up to 4 mm².

All of Weidmüller's SSRs undergo a functional and dielectric test. That guarantees 100 percent functionality and ensures reliable electrical isolation of the control and load circuits. MICROOPTO valve switches carry the CE mark. Further approvals such as cULus are being prepared.

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