SSR with BS2

curious1

Hello,
I have several of these and would like to use them with my BS2. Is anything else required to use them with an out pin ?
Thanks, RC


120/240 Volt Solid State Relays


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Mike Green

If the signal input resistance is indeed 1K, you should be able to drive it directly from a BS2 pin. The main issue is that the input be current limited to something the BS2 can handle (roughly 20ma max.) Perhaps they have a datasheet that's more explicit about this. You can always add an additional 220 ohm resistor in series with the I/O pin to "play it safe" until you can check for sure. The minimum voltage (3V) should work.

curious1

First post has·all of the info that I could find.

I'll just use the 220 resistor to be safe.

These are hassle free and pcb models are cheap, $12 a pop.

Thanks Mike,

RC

skylight

In my experience of working with several different types of SSR and measuring the current drawn at the input stage I have found that on the whole they·mostly tend to draw around the 1ma range @12v(havn't tested for 5V)·so i'm assuming several on one pin shouldn't be a problem, have you access to a current meter? Connect a battery or PS to the SSR and measure the current.
Another useful feature i have discovered with SSR's is their ability to switch far lesser AC voltages than their rated voltage ie instead of just switching 230V ( I live in the UK) I have had them successfully switching voltages as low as 12VAC.
One more feature is that they can also switch a dimmed mains input useful for setting a preset level of lighting and switching this on and off (used in my work).

curious1

Thanks skylight,
A GOOD meter is on my wish list.
I will only have 1 relay per pin, 4 total.
RC