Siemens SINUMERIK 840DE User Manual page 35

03.06
Mounting the DC
link busbar 1. Remove the plastic cover over the DC link busbars by loosening it with a flat
2. Remove the DC link busbars at the module to the right of the NCU box.
3. Now mount the DC link busbars from the accessory kit of the NCU box be-
4. Place the cover into the matching cut-outs with the plastic lugs facing down-
Inserting the NCU
The NCU module is secured when it clicks into the NCU box.
In order to guarantee the vibration resistance, both slotted screws (1) must be
tightened (see Fig. 3-3).
The battery/fan module is delivered completely assembled with the NCU box.
Fig. 3-3
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D Configuring Manual NCU (PHD) – 03.06 Edition
screwdriver in the gap on the top and then folding it forward and down.
tween the power module and the first drive module. Use the screws located
on the modules (observe tightening torque, M4: 1.8 Nm, M5: 3 Nm).
ward and close the DC link by folding the cover backward until the topside
latch clicks.
NCU module
1
Memory card 1
Battery/fan
slide-in module
Installation of the NCU module in the NCU box
3 Structure and Installation
3.2 Installation of the SINUMERIK 840D
NCU box
PE conductor connection
End-to-end
DC link
busbars
3-33