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4-12

Installing 575 System Hardware SIMATIC 545/555/575 System Manual

Installing the PPX:575–2130 VMEbus Base (continued)

Figure 4-7 shows the measurements required for rear mounting in a NEMA

cabinet or mounting against a wall. Rear mounting brackets are included

for these mounting options. The cabinet must provide a minimum depth of

12 inches to accommodate cabling from the front of installed modules. Leave

clearance of at least 3 inches above and below the base for proper cooling.

19.0 (483)

18.31 (465)

0.272

(6.9)

8 holes

0.35

(8.9)

12.25

(311)

diameter Measurements: in. (mm)

3.50 (89)

2.25 (57)

1.50 (38)

Figure 4-7 VMEbus Base Wall or Cabinet Mounting Measurements

Use the following steps for panel mounting in an NEMA cabinet.

1. Open NEMA enclosure door.

2. Drill four holes in sub-panel of NEMA enclosure with a #21 drill bit.

Refer to Figure 4-7 for screw-hole dimensions for each base.

Ensure that chips from drilling do not contaminate other equipment.

3. Position the base inside the NEMA enclosure.

NOTE: Be sure that the bracket holes and the tapped holes in the sub-panel

are aligned.

NEMA Cabinet

Mounting

Measurements

Panel Mounting the

Base

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