Siemens SINUMERIK 840D sl Manual page 99

Requirement
The PCU must now be bolted to the mounting brackets prior to assembly (if this has not already
been done). See Section in the "PCU 50.5" manual under "Assembly" → "Assembly of PCU
and operator panel front (standard mounting)"
①
②
③
④
⑤
⑤
Figure 5-3
Procedure
1. Place the OP 012 face down on a flat, soft (to avoid scratches) surface.
– Installation of the direct key module (see section in the "Direct key module" manual
– Install or replace the softkey labeling strips (see Softkey labeling (Page 102))
2. Remove the PCU's interface cover.
3. Place the PCU with the lugs of the bolted-on mounting brackets into the mounting slots on
the OP 012 as shown by the white arrows in diagram (A).
To make it easier to insert the lugs, it can be helpful to reduce the 90° angle between the
PCU and OP 012 by tilting the PCU as shown by the black arrow in the picture.
4. Insert cables K1
gray arrows in the diagram (A)]. Make sure that the connectors lock in audibly and that the
locks [see arrows in diagram: (B)] are closed.
5. Swivel the PCU into its final position and secure it with knurled screws, tightening torque
of 1.8 Nm [see diagram: (C)].
Operator panel front: OP 012
Manual, 09/2016, A5E36371591B
Mounting slots for PCU lugs
Slots for inserting softkey labeling strips
I/O USB cable K1
Display cable K2
Cover plate for keyboard controller connections
Retainers
Rear of the OP 012
under "installation" → "Combination with OP 012")
①
and K2
②
of the OP 012 in the connector strips of the PCU [see the
5.2 Assembling an OP 012 and a PCU
Installation
99