GE-Fanuc 90-30 Analog Modules: Key Features and Wiring Methods

Analog Module Key Features

The GE-Fanuc 90-30 analog modules offer several user-friendly features that enhance ease of installation and operation. Here are the main features:

    Removable Terminal Board: You can remove the terminal board from the module to wire it if desired. Once wiring is complete, you can easily reinstall it on the module. If you need to replace the module later, you won’t have to rewire if the terminal board is still in good condition. Simply remove the wired terminal board from the old module and install it on the new one. The terminal board screw terminals also provide convenient points for measuring voltages during testing or troubleshooting.

    Hinged Front Cover: The cover opens easily to provide access to the terminal board connections. For safety, it should remain closed during normal operation to prevent accidental contact with live terminals. The back of the front cover insert contains a schematic diagram of the terminal board connections, and the module catalog number (e.g., IC693ALG391) is printed on the front cover insert and on a label on the side of the module. You can temporarily remove the insert to label the signal names for each point, which can be helpful for testing or troubleshooting. The color coding on the left edge of the front cover insert identifies the module type: Blue = DC, Red = AC, Gray = Analog.

    Module Lens Cap: Located on the top front of the module, this cap covers the OK status LED. This LED indicates the basic status of the module. For normal operation, the OK LED should be lit.

Wiring Methods for Analog Modules

For analog module input or output signal connections, it is highly recommended to use twisted, shielded instrumentation cable. Proper grounding of the shield is also crucial. To minimize electrical noise, the cable shield should be grounded at only one end.

    For Analog Input Modules: Ground the shield at the device end in the noisiest environment. Keep the shield grounded at the source of the noise to reduce interference.

    For Analog Output Modules: Ground the shield at the module end only.

Wiring Methods for Analog Input Modules:

    Direct Method: Run a shielded cable from the field device (transducer, potentiometer, etc.) directly to the module. Ground the shield at the field device end, keeping the exposed conductors to a minimum in the noisy environment. Do not connect the shield at the module end; instead, insulate it with shrink tubing.

    Terminal Strip Method: Install a terminal strip inside the control enclosure and run a shielded cable from the terminal strip to the module’s terminal board. Ground the shield to the metal panel next to the terminal strip, but do not connect the shield at the module end (insulate it with shrink tubing). Wire the field device to the terminal strip using another shielded cable, grounding the shield at the device end only.

Wiring for Analog Output Modules:

For output connections, each signal should use a good quality shielded wire, with the shield grounded at the module end only.

By following these wiring methods, you can ensure that Series 90-30 PLC Analog Modules operate with maximum efficiency and minimal interference, providing reliable and stable signal transmission in noisy environments.

++ Other 90-30 PLC modules

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