EX10-MAO22 EX10-MAO22 Analog Output, 2 Ch, 4-20 ma/1-5 Vdc--12 Bit. $597.00 | TAD131-BS TAD131-BS 1 Analog Input, +/-10 Vdc, 12 bit resolution, Fits inside T1-40. $239.00 | GCF612**S GCF612**S (GCF612--S) Communications Module, 2 ch RS232/RS485, ASCII/binary, fo $1,828.00 |