Product Description
. . . . . Simplex Grinnell 4100-6038 565-415 Dual RS232 2120 Interface Sub-Assembly Board Kit
4100/4120-0113, 4100-6038 Dual RS-232/2120 Modules
4100-6038 - used for systems with 2975-94xx Back Boxes (4100U and 4100ES). . Simplex Grinnell. TE Connectivity. 4100-6038.