逻辑电流通过一-系列由简单程序指令控制的回路，工作原理如同机械继电器和输出线圈。一个继电器是否通过逻辑电流依赖于和继电器相关的存储器的内容。例如，如果相关存储器内容为1，则通过逻辑电流，为0则不通过逻辑电流。
CMC 3-531-2986A Logic Control Module #8724
Foxboro Controller KO143AK-E 760CNA-AT #10767
Allen Bradley Operator Interface 2711-K5A2 #26577
Uticor Technology 76561-16 Operator Interface #23008
Kebco S4 Profibus DP Operator Drive 4000 RPM #2118
Barber Colman 80CC-11001-101-0-00 MACO 8000 #8019
Mitsubishi PC Board BN624A103H01, LC37A, #20838
Mitsubishi Transistor Unit FX2N-80MT, Melsec, #21215
Conair PC Control Board 107-471-01-01 #38140
Protectoseal Flammable Liquid Storage Cabinet 6555 # 3
Apex Teach Pendant AT-LCD CE #37983
Scotch Automatic Box Taper 37900 2″ tape #27103
Allen Bradley Safety Controller 440F-C28011 #29230
Baltec RC 10 Control WM 092014-51 #33850
Reliance 0-51847-4 Voltage Detect VLDE #23191
Ingersoll Rand Control Module 99384224R0.4 #33330
Barber Colman 80CC-11001-002-0-00 Sequence MACO #24836
Sanyo ABS Servo Amplifier 65AA015PXR12 #10900
CTI Cryogenics Control Module 0910-151-0059 #34350
Allen Bradley Drive 1305-BA06A, Series C, #20503
