HP A6604 Installation Manual page 61

Figure 4-7 Connect the PGND cable to the grounding bar
(1) Hex nut
(3) Naked part of the PGND cable
(5) Grounding bar
The resistance between the router chassis and the ground must be less than 5 ohms.

Use the PGND cable provided with the router to connect the ground bar in the equipment room.

Otherwise, the router may not be effectively grounded, which easily causes damage to the
router.
Installing and Removing an RPE-X1
Interior Structure of an MPU
Figure 4-8 Interior structure of the RPE-X1
(1) Memory module
(3) CPU heatsink
(5) Release latch
(2) PGND cable
(4) Grounding post
(2) Memory module slot
(4) Built-in CF card