Serial Converters/Repeaters/Isolators

Black Box IC1157A. Dimensions (WxDxH): 2.2 x 0.591 x 2.2" (56 x 15 x 56 mm)

StarTech.com IC232485S. Width: 2.32" (59 mm), Depth: 4.61" (117 mm), Height: 0.866" (22 mm). Input voltage: 110 - 240 V, Input current: 0.3 A. Housing material: Steel. Certification: CE, FCC, REACH

StarTech.com RS-232 to RS-485/422 Serial Interface Converter. Width: 2.13" (54 mm), Depth: 2.91" (74 mm), Height: 0.748" (19 mm)

Trendnet TI-S100. Width: 1.54" (39 mm), Depth: 1.3" (33 mm), Height: 0.591" (15 mm)