FAIRCHILD防爆I/P转换器TXI7800 
常用型号如下：
TAXI7800-401
TAXI7800-401E
TAXI7800-421
TCXI7800-401
TCXI7800-401E
TCXI7800-401E2
TCXI7800-401EN
TCXI7800-401N
TCXI7800-402
TCXI7800-403
TCXI7800-403E
TCXI7800-403EN
TCXI7800-406
TCXI7800-411
TCXI7800-421
TCXI7800-421E
TCXI7800-4E
TEXI7800-401
TEXI7800-401E
TEXI7800-401EN
TEXI7800-401N
TEXI7800-401U
TEXI7800-402
TEXI7800-403
TEXI7800-403E
TEXI7800-411
TEXI7800-411E
TEXI7800-411EN
TEXI7800-411U
TEXI7800-412
TEXI7800-413
TEXI7800-413E
TEXI7800-421
TEXI7800-421E
TEXI7800-421U
TEXI7800-422U
TFXI7800-401
TFXI7800-401E
TFXI7800-401EN
TFXI7800-402
TFXI7800-402E
TFXI7800-403
TFXI7800-403E
TFXI7800-403EN
TFXI7800-411
TFXI7800-421
TCXI7850-401
TCXI7850-401E
TCXI7850-401EN
TEXI7850-401
TEXI7850-421
TFXI7850-401
TFXI7850-401E
TFXI7850-401EN
TFXI7850-402EN
TFXI7850-403
TFXI7850-403E
TFXI7850-403EN
TFXI7850-405