Structure of the Sinumerik 840D NCU

The Sinumerik 840D consists of two components:

• The NCU box (sheet metal housing with a combined batter/fan slide-in module) for housing the NCU
• NCU module (Numeric Control Unit)

Installation of the Sinumerik 840D

Preparing for installation:

–          You need the following to assemble the Sinumerik 840D

• Screwdriver for slot-head screws sizes 0 and 1
• Screwdriver for Torx screws M4 and M5

Assembly of the NCU Box

–          The NCU box is installed between the Simodrive power supply and the first Simodrive drive module. To secure the NCU box, two M5 screws are recommended.

Moutning the DC link busbar

–          Remove the plastic cover over the DC link busbars by loosening it with a flat screwdriver in the gap on the top and the folding it forward and down.

–          Remove the DC link busbars at the module to the right of the NCU box.

–          Now mount the DC link busbars from the accessory kit of the NCU box between the power module and the first drive module. Use the screws located on the modules.

–          Place the cover into the matching cut-outs with the plastic lugs facing downward and close the DC link by folding the cover backward until the topside latch clicks.

Inserting the NCU

–          The NCU module is secure when it clicks into the NCU box.

–          In order to guarantee the vibration resistance, both slotted screws (1) must be tightened.

–          The battery/fan module is delivered completely assemble with the NCU box.

For more info, give us a call at 800-691-8511 or email sales@mroelectric.com. Our full Sinumerik series is listed here.