About the IC609EXP121
The IC609EXP121 module is an expansion unit for a device that is part of the GE Fanuc line of products entitled Series One Junior. This product is no longer available from the original manufacturer, GE Fanuc, but it can typically be seen inside of our stock here at AX Control. If you would like to check on whether or not this product is inside of our stock, then you can contact us via phone or email or look on our website.
The expansion unit is designed to be used in conjunction with the IC609SJR121 Source In/Relay Out CPU unit. Both of these devices need to have 115 VAC of power connected to them in order for them to power up and for operation to occur. If you are in need of the IC609SJR121 Source In/Relay Out CPU unit, then you can click on the link in the first sentence of this paragraph to find its page on our website where its availability will be listed.
The IC609EXP121 expansion unit uses normal blow type fuses. The normal blow fuses have a current rating of 5 Amps and are installed inside of the IC609EXP121 expansion unit by use of fuse clips. The fuses have their own protection systems that shield the output circuitry from any damage that would otherwise occur.
In the event that there is an issue with your IC609EXP121 expansion unit, then using the programmer unit is ideal. It is the main diagnostic tool for the Series One Junior devices. This tool with assist you in determining the status of the IC609EXP121 expansion unit and other Series One Junior devices.