描述
继电器控制是通过元件之间的硬接线来实现的，因此其控制功能就固定在线路中了，因此功能专一，不灵活；而PLC控制是通过软件编程来解决的，只要程序改变，功能可跟着改变，控制很灵活。又因PLC是通过循环扫描工作的，不存在继电器控制线路中的联锁与互锁电路，控制设计大大简化了。
Ref: 12XCA28A , GE RELAY TEST PLUG
GE MULTILIN VOLTAGE MANAGEMENT RELAY MIVII1000E00HI
Ref: GE MULTILIN VOLTAGE MANAGEMENT RELAY MIVII1000E00HI
GE 124Y0B2804A Time Delay Relay 600VAC/DC NEW NNB
Ref: GE 124Y0B2804A Time Delay Relay 600VAC/DC NEW NNB
GE TYPE HEA61 12HEA61B236X2 125VDC MULTI CONTACT RELAY
Ref: GE TYPE HEA61 12HEA61B236X2 125VDC MULTI CONTACT RELAY
GE General Electric RELAY BOARD 193X278AAG03 193X278AA
Ref: GE General Electric RELAY BOARD 193X278AAG03 193X278AA
GE 12IAC53A803A/IAC 53A803A RELAY **NNB**
Ref: GE 12IAC53A803A/IAC 53A803A RELAY **NNB**
GE DIFCA5B Digital Time Overcurrent Relay DIFCA5A
Ref: GE DIFCA5B Digital Time Overcurrent Relay DIFCA5A
GE 12IAC51A802A Time Overcurrent Relay IAC51A802A New
Ref: GE 12IAC51A802A Time Overcurrent Relay IAC51A802A New
GE CLO1A310T1 CONTACTOR / RT1- O/L RELAY LIQUIDATION
Ref: GE CLO1A310T1 CONTACTOR / RT1- O/L RELAY LIQUIDATION
NIB GE 3S7505BR520A5 Lamp Burnout Relay
Ref: NIB GE 3S7505BR520A5 Lamp Burnout Relay
General Electric GE 3S2791G138A4 Relay USED Free Ship
