Juniper SRX 5800, Hardware Manual

Page: 503 / 536

•
Operate the device within marked electrical ratings and product usage instructions.
•
To ensure that the device and peripheral equipment function safely and correctly, use the cables and
connectors specified for the attached peripheral equipment, and make certain they are in good condition.
You can remove and replace many device components without powering off or disconnecting power to
the device, as detailed elsewhere in the hardware documentation for this device. Never install equipment
that appears to be damaged.
Prevention of Electrostatic Discharge Damage
Device components that are shipped in antistatic bags are sensitive to damage from static electricity. Some
components can be impaired by voltages as low as 30 V. You can easily generate potentially damaging
static voltages whenever you handle plastic or foam packing material or if you move components across
plastic or carpets. Observe the following guidelines to minimize the potential for electrostatic discharge
(ESD) damage, which can cause intermittent or complete component failures:
•
Always use an ESD wrist strap when you are handling components that are subject to ESD damage, and
make sure that it is in direct contact with your skin.
If a grounding strap is not available, hold the component in its antistatic bag (see Figure 164 on page 506 )
in one hand and touch the exposed, bare metal of the device with the other hand immediately before
inserting the component into the device.
WARNING: For safety, periodically check the resistance value of the ESD grounding
strap. The measurement must be in the range 1 through 10 Mohms.
•
When handling any component that is subject to ESD damage and that is removed from the device,
make sure the equipment end of your ESD wrist strap is attached to the ESD point on the chassis.
If no grounding strap is available, touch the exposed, bare metal of the device to ground yourself before
handling the component.
•
Avoid contact between the component that is subject to ESD damage and your clothing. ESD voltages
emitted from clothing can damage components.
•
When removing or installing a component that is subject to ESD damage, always place it component-side
up on an antistatic surface, in an antistatic card rack, or in an antistatic bag (see Figure 164 on page 506 ).
If you are returning a component, place it in an antistatic bag before packing it.
505