数字量输入输出信号就是开关量信号，1或者0。模拟量信号有2种，电压或者电流信号 ，一般是变送器传过来的信号，比如用压力变送器检测水管压力，它会输出一个模拟信号4--20ma或者0-10V的信号给PLC，PLC来进行数据处理

Mitsubishi/三菱  晶体管输入输出模块
FX3U-128MR-ES-A
FX3U-80MR-ES-A
FX3U-64MR-ES-A
FX3U-48MR-ES-A
FX3U-32MR-ES-A

FX3U-16MR-ES-A
FX3U-80MR-DS
FX3U-64MR-DS
FX3U-48MR-DS
FX3U-32MR-DS
 
FX3U-16MR-DS
FX3U-128MT-ES-A
FX3U-80MT-ES-A
FX3U-64MT-ES-A
FX3U-48MT-ES-A

FX3U-32MT-ES-A
FX3U-16MT-ES-A
FX3U-80MT-DS
FX3U-64MT-DS
FX3U-422-BD

FX3U-48MT-DS
FX3U-32MT-DS
FX3U-16MT-DS
FX3UC-32MT-LT
FX3U-232-BD

FX3U-485-BD
FX3U-CNV-BD
FX3U-USB-BD
FX3U-2HSY-ADP
FX3U-4AD-ADP

FX3U-4AD-PT-ADP
FX3U-4AD-TC-ADP
FX3U-4DA-ADP
FX3U-4HSX-ADP
FX3U-232ADP

FX3U-485ADP
FX3U-1PSU-5V
FX3U-4AD 
FX3U-4DA
FX3U-7DM

FX3U-7DM-HLD
FX3U-20SSC-H
FX3U-32BL
FX3UC-1PS-5V
FX3UC-4AD
FX3U-FLROM-16
FX3U-FLROM-64
FX3U-FLROM-64L
FX2N-128MR-001

FX2N-80MR-001
FX2N-64MR-001
FX2N-48MR-001
FX2N-32MR-001
FX2N-16MR-001
FX2N-80MR-D
FX2N-64MR-D
FX2N-48MR-D
FX2N-32MR-D
FX2N-128MT-001

FX2N-80MT-001
FX2N-64MT-001
FX2N-48MT-001
FX2N-32MT-001
FX2N-16MT-001
FX2N-80MT-D
FX2N-64MT-D
FX2N-48MT-D
FX2N-32MT-D
FX2NC-96MT

FX2NC-64MT
FX2NC-32MT
FX2NC-16MT
FX2N-48ER
FX2N-48ET
FX2N-32ER
FX2N-32ET
FX2N-16EX
FX2N-16EYR
FX2N-16EYT

FX2N-8ER
FX2N-8EX
FX2N-8EYR
FX2N-8EYT
FX2NC-32EX
FX2NC-32EYT
FX2NC-16EX
FX2NC-16EYT
FX2NC-16EX-T
FX2NC-16EYR-T