Siemens PC 870 manual Installation with, Clamp fixing, Screw fixing

Mounting

Installation with	The clamps and grub screws required for installation are supplied with
clamp fixing	the device. Proceed as follows:
	1.	Insert the complete operating unit and computing unit into the moun-
		ting cut-out prepared as described in Section 3.1, working from the
		front.
	2.	From the rear, fix the operating unit in position in the mounting cut-
		out using the six clamps (see Figure 3-3) by tightening the grub
		screws (torque 0.4 - 0.5 Nm).
Installation with	The 12.1º touchscreen version is not suitable for installation with screw
screw fixing	fixings. With the other operating units, proceed as follows:
	1.	Drill suitable holes around the prepared mounting cut-out (see
		Section 3.1) as specified for L4 and L5 in Figure 3-3.
	2.	Carefully knock out the drill hole covers on the front side of the ope-
		rating unit:

Drill hole covers

3.Working from the front, insert the complete operating unit and com- puting unit into the mounting cutout, ensuring that is flush with the drill holes.

4.Fix the operating unit at the drill holes using suitable screws and nuts.

3.2.2Panel PC 870

The operating unit can be fitted in the mounting cut-out with either clamps or screws.

￿Protection class IP 65 is possible when the operating unit is secured with clamps (in conjunction with a continuous gasket).

￿Protection class IP 54 is achieved with screw fixings.

3-4	SIMATIC Panel PC 670 / 870 Operating Unit, Equipment Manual
	Edition 07/01