abb, 1sna684238r0400, serial-data-converter-rs232-fo,

ABB 1SNA684238R0400 SERIAL DATA CONVERTER, RS232-FO-P

abb, 1sna684236r2200, serial-data-converter-rs232-fo,

ABB 1SNA684236R2200 SERIAL DATA CONVERTER, RS232-FO-S