Yes, the -3210 transformer is the same transformer thru all the Fire Life and Safety Products (SE and ME). The current draw rating for the transformer is 400mA which means, it could power 3 SE/MEunits.
The -3210 transformer reduces line voltage from 120V to 24V AC and is Mounted on a cover for 4˝ (102 mm) x 4˝ x 2-1/8˝ (54mm) junction box (by others).
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