Module ntụgharị E02 bụ ịghọta ntugharị ibe n'etiti ọkwa TTL/COMS na ọkwa RS232.
E08-anọ n'ime-otu bụ modul ntụgharị na-arụ ọrụ, nke nwere ike ijikwa 1 ruo 4 modul nke ụkpụrụ ụlọ ọrụ anyị akọwapụtara maka otu oge, crossover ma ọ bụ ọrụ ntuli aka.
A na-eji E07 dozie ọkwa voltaji na-akpaghị aka, ọ ga-ebelata voltaji ntinye aka na ọkwa ebumnuche gị wee debe ọkwa ahụ ka ị na-eme ihe mmetụta.