Pulse Output Relay Equivalents


They are like a Form A relay contact but are polarity sensitive because they use a transistor.
No, but they are generally compatible.


The Pulse WattNode uses optoisolators to generate the output pulses. These approximate a relay contact closure and are compatible with almost all devices that expect a relay, but there are some differences.

Specifications (from WattNode Pulse Manual)

WattNode Pulse meter optoisolator dropout voltage graph

Solid-State Relays

For a closer approximation to an actual relay, see Option SSR. Option SSR substitutes optically isolated solid-state relays in place of the optoisolators, and can switch much higher currents. They also have a low on-resistance, so they more closely approximate

Relay Types

See Also

Keywords: opto-isolator, FormA, FormC


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