A: A Relay is an electrical mechanical device used to switch an alternate voltage source. The Relay will use mechanical Isolation between Voltage sources. An Optocoupler is a semiconductor device used to switch an alternate voltage source. The Optocoupler will use Optical(light) Isolation between Voltage sources. Due to the semiconductor properities, the Optocoupler will be use for higher speeds, or more off/on operations (once every 5 minutes)
A: To cross a relay you need to know: 1. The Input Voltage (coil voltage) 2. The Output Current (amps) 3. The number of contacts required (# of N.O.'s, # of N.C.'s) 4. The type of contacts required (Silver, Gold, etc.)
A: To cross a relay you need to know: 1. The Input Voltage (coil voltage) 2. The Output Voltage & Polarity 3. The Output Current (amps) 4. The Switching Speed for the Output
Many of our terminal block AC/DC relays may appear to be without coil suppression diodes. This is accomplished by the reverse bias LED (see below). The R500 series is also unusual in that, unlike the Optocoupler R500 family which uses the same base for all plugs (either input or output) and has different plugs for each product, The relay plugs are all 24vdc regardless of the rated coil voltage. In the R500 relay family the voltage is converted in the base socket to 24vdc to power the 24vdc relay plug. All our R500 relays with LED terminals uses the bidirectional LED as diode protection of the coil, because the LED is in parallel with the coil.
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