MicroLogix 1400 Programmable Controllers

24 MicroLogix 1400 Programmable ControllersGrounding the ControllerIn solid-state control systems, grounding and wire routing helps limit the effects of noise dueto electromagnetic interference (EMI). Run the ground connection from the ground screw ofthe controller to the ground bus prior to connecting any devices. Use AWG #14 wire. ForAC-powered controllers, this connection must be made for safety purposes.You must also provide an acceptable grounding path for each device in your application. Formore information on proper grounding guidelines, refer to the Industrial Automation Wiringand Grounding Guidelines, publication 1770-4.1.Wiring Your Analog ChannelsAnalog input circuits can monitor voltage signals and convert them to serial digital data asshown in the following illustration.Analog InputSensor 2(V) VoltageSensor 0(V) VoltageInput Terminal Block/7I/8 I/10COM 3 I/13 I/15 I/17 I/19IV0(+)IV2(+)COM 2I/9 I/11I/12 I/14 I/16 I/18 COMANAIV1(+)IV3(+)Sensor 1(V) VoltageSensor 3(V) Voltage44529Publication 1766-IN001A-EN-P - July 2008