PLC本身具有较强的自诊断功能，保证硬件核心设备（CPU、存储器、I/O总线等）在正常情况下执行用户程序，一旦出现故障则立即给出出错信号，停止用户程序的执行，切断所有输出信号，等待修复。PLC的主要模块均采用大规模和超大规模集成电路，I/O系统设计有完善的通道保护与信号调理电路。在结构上对耐热、防潮、防尘、抗震等都有精确的考虑，在硬件上采用隔离，屏蔽、滤波、接地等抗干扰措施，在软件上采用数字滤波等措施。与继电器系统和通用计算机相比，PLC更能适应工业现场环境要求。可靠性高，抗干扰能力强。工业生产一般对控制设备的可靠性要求很高，并且要有很强的抗干扰能力。PLC能在恶劣的环境中可靠的工作，平均无故障时间达到数万小时以上，已被公认为最可靠的工业控制设备之一。
产品列表：
DS200SHVMG1A
DS200UPSAG1AEC
DS200UPSAG1ADB
DS200GSIAG1B
DS200SSBAG1BAA
DS200DCFBG1BNC
DS200CPCAG1ABB
DS200IIBDG1ACA
DS200IMCPG1CGC
DS200ADGIH1AAA
DS200FSAAG1ABA
DS200AAHAH1A
DS200SDCCG1ABA
DS200SDCCG1ACA
DS200SDCCG1AGD
DS200SDCCG1AAA
DS200SDCIG2AFB
DS200LDCCH1APA
DS200TCCBG8BED
DS200SHCAG1BAA
DS200IPCSG1A
DS200GDPAG1AGC
DS200SVMAG1ACC
DS200PCCAG6ACB
DS200GGXCG1ADC
DS200STBAG1ADC
DS200SHVMG1AFE
DS200LPPAG1AAA
DS200GGXCG1ACB
DS200ADPAG1ABB
DS200IOEAG1AAA
DS200ADCIH1ADB
DS200GGXAG1ADB
DS200PCCAG7A
DS200IIBDG1AEA
DS200IIBDG1ADA
DS200IIBDG1ACA
DS200IIBDG1AAA
DS200FPSAG1ABB
DS200PCCAG7ACB
DS200FSAAG1A
DS200SDCIG2A
DS200DPCBG1A
DS200FSAAG2A
DS200IAXSG1A
DS200GSIAG1BBB
DS200GSIAG1ABA
DS200GDPAG1AKF
DS200KLDBG1A
DS200GSIAG1CFD
DS200STBAG1ACB
DS200PCCAG8ACB
DS200SSRAG1A
DS200IMCPG1BBA
DS200IMCPG1AEA
DS200IMCPG1ADA
DS200SDCIG1AEB
DS200PCCAG5A
DS200DPCAG1-ADC
DS200RTBAG3AGC
DS200RTBAG3AFB
DS200RTBAG3AEB
DS200GGXCG1AAA
DS200ADPBG1A
DS200SLCCG1A
DS200CVMAG3AEB
DS200SDCIG1AFB
DS200GSIAG1ACA
DS200IQXSG1AAA
DS200GGDAG1AGD
DS200SDCIG2AGB
DS200SDCIG2AEB
DS200ACNAG1ACC
DS200PCCAG8A
DS200SLCCG1ACC
IC698PSA350
IC698PSD300
IC698CHS117
IC698CHS017
IC698CPE010
PROSOFT 3170-PDP
PROSOFT MV169-DNP
PROSOFT MVI56-DNP
PROSOFT 5205-DFNT-PDPS
PROSOFT MVI56-MNET
PROSOFT MVI69-GSC
PROSOFT AN-X-DCSNET
PROSOFT MVI56-MBP
PROSOFT PS3250-L532M
PROSOFT MVI46-GSC
PROSOFT MVI56-MCM
PROSOFT 5201-MNET-DFNT
PROSOFT 3250-L532M
PROSOFT AN-X-DCSNET
PROSOFT MVI46-MNET
PROSOFT 3300-MBP
PROSOFT 5204-MNET-PDPMV1
PROSOFT 4201-WEB-DFM
PROSOFT 2100-AGA
PROSOFT PC56-NT-IDE
PROSOFT 3350-MBP
PROSOFT 4310-MBP-RIO
PROSOFT MVI46
PROSOFT RL-2400S
PROSOFT 4303-MBP-DFNT
PROSOFT MVI56-BDW
PROSOFT 1100-MBS
PROSOFT 1100-MBM
PROSOFT MVI56-GSC
PROSOFT MVI94-GSC
PROSOFT RL-2400E
PROSOFT 3100-MCM
PROSOFT MVI46-DFCM
PROSOFT 4102-MCM4-DFCM4
PROSOFT MVI56-WA-EIP
PROSOFT 3170-PDP
PROSOFT MVI46-ADM
PROSOFT MVI46-DCFM
PROSOFT 4202-DFNT-MCM4
PROSOFT 5601-RIO-ASCII
PROSOFT 1560-MBP
PROSOFT MVI56-GEC
PROSOFT MVI46-HART
PROSOFT MVI56-BAS
PROSOFT MVI56-ADM
PROSOFT 4202-DFNT-ASC114
