• Make sure to have the following safety circuits outside of the PLC to ensure safe system operation even during
external power supply problems or PLC failure.
Otherwise, malfunctions may cause serious accidents.
1) Most importantly, have the following: an emergency stop circuit, a protection circuit, an interlock circuit for
opposite movements (such as normal vs. reverse rotation), and an interlock circuit (to prevent damage to the
equipment at the upper and lower positioning limits).
2) Note that when the PLC CPU detects an error, such as a watchdog timer error, during self-diagnosis, all
outputs are turned off. Also, when an error that cannot be detected by the PLC CPU occurs in an input/output
control block, output control may be disabled.
External circuits and mechanisms should be designed to ensure safe machinery operation in such a case.
3) Note that the output current of the service power supply for sensors varies depending on the model and the
absence/presence of extension blocks. If an overload occurs, the voltage automatically drops, inputs in the
PLC are disabled, and all outputs are turned off.
External circuits and mechanisms should be designed to ensure safe machinery operation in such a case.
4) Note that when an error occurs in a relay, triac or transistor output device, the output could be held either on or off.
For output signals that may lead to serious accidents, external circuits and mechanisms should be designed to
ensure safe machinery operation in such a case.
PLC FX1S-20MR-DS
晶体管输出单元 FX2N-48ET-D
PLC FX2N-48MT-ES/UL
PLC FX3U-64MT/DS
输入模块 FX2N-8EX-UA1/UL
扩展模块 FX2N-2DA
输出模块 FX2N-16EYT-ESS/UL
PLC FX2N-32MR-UA1/UL
PLC FX2N-64MT-D
PLC FX1S-10MR-D
存储卡 FX-EEPROM-16
PLC FX1S-14MR-ES/UL
PLC FX3U-80MT/ESS
USB通信板 FX3U-USB-BD
PLC FX3U-48MT/ESS
PLC FX3U-128MT/ESS
RS-232C通讯用模块 FX2N-232IF
PLC FX3G-14MT/ESS
PLC FX2N-48MT-DSS
可编程控制器 FX2N系列
PLC FX1S-10MT-D
PLC FX2N-80MT-001
输入模块 FX2N-8EX-ES/UL
PLC FX2N-32MR-D
PLC FX3U-80MT/DSS
RS-485扩展板 FX1N-485-BD
PLC FX2N-64MR-DS
PLC FX2N-128MR-D
PLC FX1S-14MT-DSS
扩展模块 FX2N-16EX