PLC冗余功能的选择
a．控制单元的冗余
（1）重要的过程单元：CPU（包括存储器）及电源均应1B1冗余。
（2）在需要时也可选用PLC硬件与热备软件构成的热备冗余系统、2重化或3重化冗余容错系统等。
b． I/O接口单元的冗余
（1）控制回路的多点I/O卡应冗余配置。
（2）重要检测点的多点I/O卡可冗余配置。3）根据需要对重要的I/O信号，可选用2重化或3重化的I/O接口单元。
产品列表：
6FX1-118-6AB01
6FX1-112-0AB01
6FX1-866-0BX03-4H
6FX1-123-8CA03
6FX1-115-0AA02
6FX1-120-3BE00
6FX1-125-8AB01
6FX1-122-2AA01
6FX5002-5DA33-1BA0
6FX1-127-3AA00
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6FX1-125-0CA01
6FX8002-5CA23-1CJ0
6FX1-151-1BA01
6FX1-120-2CA02
6FX1817-0AX17
6FX1-125-7BA00
6FX8002-5DX18-1AF0
6FX8-002-5DA23-1BD0
6FX1122-5CC01
6FX1-120-3BB00
6FX1-120-1AD01
6FX1-111-0AN02
6FX1-120-4BA02
6FX1113-8AB01
6FX1-122-1AD02
6FX1-122-1AC02
6FX1-118-4AA01
6FX1-120-3BB01
6FX1-123-0AA01
6FX1-112-1AE00
6FX1-127-3AB00
6FX1-190-1AF00
6FX1-124-6AA02
6FX1-111-4AA00
6FX1-821-0AX13
6FX1-120-12AB03
6FX1-192-4AA00
6FX1122-5CD01
6FX1-1257-AB01
6FX1-121-8BA03
6FX1-121-4BA02
6FX1-128-1BA00
6FX1-112-0AA01
6FX1-114-6AC00
6FX5002-5CS23-1AH0
6FX1-128-1BB00
6FX1-118-4AB01
6FX1-1110-7AF01
6FX1-116-8AA00
6FX1-110-7AA01
6FX1-112-1AC00
6FX1-126-8BA00
6FX1-111-1AA01
6FX1-122-3CA01
6FX1128-4BD00
6FX1-120-7BB01
6FX1-132-1BB01
6FX1-121-2BB02
6FX1-821-0AX03
6FX1818-1BX12
6FX1-818-1BX01
6FX1-125-1AA01
6FX1-192-4AB00
6FX1-122-1AA01
6FX1-118-1AA02
6FX1-118-1AA01
6FX1-122-1AA02
6FX1-821-0AX02
6FX1-120-7BA01
6FX2001-2EF00
6FX2-001-5HS24
6FX1-126-6BA00
6FX1-122-8BC04
6FX1-130-5BB00
IS215UCVEM06A
IS200VTCCH1B
CP-9200SH/CPU
PC-0984-785
PC-E984-480
PC-E984-258
PC-CBCA-000
PC-BALU-821
PC-0984-455
PC-L984-785
PC-E984-255
PC-E984-285
PC-0984-351
PC-0984-485
PC-E984-785
PC-E984-685
PC-E984-381
PC-F984-385
PC-F984-785
PC-BALU-130
PC-CBCB-000
PC-E984-275
