ACX7348 Site Guidelines and Requirements

You must install the router in a rack or cabinet in a dry, clean, well-ventilated, and temperature-controlled environment.

Follow these environmental guidelines:

• The site must be as dust-free as possible because dust can clog air intake vents and filters, reducing the efficiency of the router cooling system.

• Maintain ambient airflow for normal router operation. If the airflow is blocked or restricted, or if the intake air is too warm, the router might overheat, and the router temperature monitor might shut down the device to protect the hardware components.

Table 1 lists the environmental conditions required for normal router operation.

Table 1: ACX7348 Router Environmental Tolerances

Description	Tolerance
Altitude	6000 ft (1828 m)
Relative operating humidity	5% to 90% (noncondensing)
Operating temperature	–40°F (–40°C) through 149°F (65°C), 1°C derating for every 1000 ft Note: With average IMIX packet size greater than 1000 bytes
Shipping and storage temperature	-40° C to 70° C (-40° F to 158° F)

Efficient device operation requires proper site planning and maintenance. It also requires proper layout of the equipment, rack or cabinet, and wiring closet.

To plan and create an acceptable operating environment for your device and prevent environmentally caused equipment failures:

• Keep the area around the chassis free from dust and conductive material, such as metal flakes.

• Follow the prescribed airflow guidelines to ensure that the cooling system functions properly. Ensure that the exhaust from other equipment does not blow into the intake vents of the device.

• Follow the prescribed electrostatic discharge (ESD) prevention procedures to prevent damaging the equipment. Static discharge can cause components to fail completely or intermittently over time.

• Install the device in a secure area, so that only authorized personnel can access the device.

Table 2 describes the factors you must consider while planning the electrical wiring at your site.

Warning:

You must provide a properly grounded and shielded environment and use electrical surge-suppression devices.

Avertissement Vous devez établir un environnement protégé et convenablement mis à la terre et utiliser des dispositifs de parasurtension.

Table 2: Site Electrical Wiring Guidelines

Site Wiring Factor	Guidelines
Signaling limitations	If your site experiences any of the following problems, consult experts in electrical surge suppression and shielding: Radio frequency interference (RFI) because of improperly installed wires Damage from lightning strikes occuring when wires exceed recommended distances or pass between buildings Electromagnetic pulses (EMPs) caused by lightning damaging unshielded conductors and electronic devices
Radio frequency interference	To reduce or eliminate RFI from your site wiring, do the following: Use a twisted-pair cable with a good distribution of grounding conductors. To exceed the recommended distances, use a high-quality twisted-pair cable with one ground conductor for each data signal, when applicable.
Electromagnetic compatibility	If your site is susceptible to problems with electromagnetic compatibility (EMC), particularly from lightning or radio transmitters, seek expert advice. Strong sources of electromagnetic interference (EMI) can cause: Destruction of the signal drivers and receivers in the device. Electrical hazards as a result of power surges conducted over the lines into the equipment.

For installations that require a separate grounding conductor to the chassis, you must ground the router before you connect power. Grounding the router ensures proper operation and meets safety and electromagnetic interference (EMI) requirements. To ground an ACX7348 router, connect a grounding cable to earth ground, and then attach the grounding cable to the chassis grounding point.

Warning:

To comply with GR-1089 requirements, all intra-building copper cabling used for transceiver ports must be shielded and grounded at both ends.

CAUTION:

Before router installation begins, have a licensed electrician attach a cable lug to the grounding cables that you supply. A cable with an incorrectly attached lug can damage the router.

Note:

You must ensure that all cables are rated for the environment in which they are deployed.

For an ACX7348 router, you need a grounding cable and an LCD6-14A-L lug (see Figure 1. The grounding lug accommodates a 6 AWG, 75 °C stranded copper wire (green with yellow insulation), or as required by the local code.