PLC本身具有較強的自診斷功能，保證硬件核心設備（CPU、存儲器、I/O總線等）在正常情況下執行用戶程序，一旦出現故障則立即給出出錯信號，停止用戶程序的執行，切斷所有輸出信號，等待修復。PLC的主要模塊均采用大規模和超大規模集成電路，I/O系統設計有完善的通道保護與信號調理電路。在結構上對耐熱、防潮、防塵、抗震等都有精確的考慮，在硬件上采用隔離，屏蔽、濾波、接地等抗干擾措施，在軟件上采用數字濾波等措施。與繼電器系統和通用計算機相比，PLC更能適應工業現場環境要求。可靠性高，抗干擾能力強。工業生產一般對控制設備的可靠性要求很高，并且要有很強的抗干擾能力。PLC能在惡劣的環境中可靠的工作，平均無故障時間達到數萬小時以上，已被公認為最可靠的工業控制設備之一。
產品列表：
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
