FMM-101(A) is a miniature monitor module a mere 1.3"(3.302 cm) H x 2.75" (6.985 cm) W x 0.65" (1.651 cm) D that sup ervises a Style B (Class B) circuit of dry-contact inp ut devices. Its comp act design allows the FMM-101(A) to be mounted in a single-gang box...