Male and Female RS232 DB37 connectors, Screw terminal block. This allowed customer to build an adapter to allow switching between devices without changing the field wiring cable.
FR-4 fiber glass PCB, dual copper layers. PCB dimensions: 72 x 116mm(W x L).
Din rail mountable - for DIN C45 width 35 / 32 / 15mm rails, Din mount case can be taken apart for panel mount use.