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ACX710 Site Guidelines and Requirements

General Site Guidelines

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 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.

Site Electrical Wiring Guidelines

Table 1 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 1: 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:

  • Improperly installed wires cause radio frequency interference (RFI).

  • Damage from lightning strikes occurs when wires exceed recommended distances or pass between buildings.

  • Electromagnetic pulses (EMPs) caused by lightning damage 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.

  • If you must 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.

Chassis Physical Specifications for ACX710 Routers

The ACX710 router chassis is a rigid sheet-metal structure that houses the hardware components. Table 2 summarizes the physical specifications of ACX710 routers and router components.

Table 2: Physical Specifications of an ACX710 Router

Item

Height

Width

Depth

Weight

ACX710

1.71 in. (43.6  mm)

17.43 in. (442.8  mm)

12.40 in.(315. mm)

8 kg

Fan tray

1.73 in. (44 mm)

17.4 in. (442 mm)

2.36 in. (60 mm)

1.2 kg

Environmental Requirements and Specifications for ACX710 Routers

The router must be installed in a rack or cabinet. It must be housed 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 3 lists the environmental conditions required for normal router operation.

Table 3: ACX710 Router Environmental Tolerances

Description

Tolerance

Relative humidity

5% to 95% (non-condensing)

Nominal operating temperature

-40° C to 65° C (-40° F to 149° F)

Shipping and storage temperature

-40° C to 70° C (-40° F to 158° F)

Cold start temperature

-40° C (-40° F)

Pollution degree

2 (IEC 60950)

Acoustic noise level

< 7.2 Bels (EN 300 753)

Enclosure classification

IP20 (IEC 60529)

Environmental class

GR-3108 Class 1 and Class 2

Seismic

Complies with Zone 4 earthquake requirements per NEBS GR-63-CORE, Issue 4.

ACX710 Grounding Cable and Lug Specifications

For installations that require a separate grounding conductor to the chassis, the router must be adequately grounded before power is connected to ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements. To ground an ACX710 router, connect a grounding cable to earth ground, and then attach it to the chassis grounding points.

Warning:

The router is pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal provided on the chassis in addition to the grounding pin of the power supply cord. Under all circumstances, use this grounding connection to ground the chassis. This tested system meets or exceeds all applicable EMC regulatory requirements with the two-hole protective grounding terminal.

Warning:

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

CAUTION:

Before router installation begins, a licensed electrician must 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 ACX710 router, you need a grounding cable and straight lug with dual holes. You also need a dual-hole straight lug connector. The grounding lug accommodates 6 AWG (10 mm²), minimum 90° C wire, or as required by the local code.

See Also

Clearance Requirements for Hardware Maintenance of ACX710 Routers

When planning the site for installing an ACX710 router, you must allow sufficient clearance around the installed chassis (see Figure 1).

Figure 1: Clearance Requirements for Hardware Maintenance of ACX710 RoutersClearance Requirements for Hardware Maintenance of ACX710 Routers

  • For the cooling system to function properly, the airflow around the chassis must be unrestricted. See Cooling System and Airflow in ACX710 Routers for more information about the airflow through the chassis.

  • If you are mounting an ACX710 router in a rack or cabinet with other equipment, ensure that the exhaust from other equipment does not blow into the intake vents of the chassis.

  • For service personnel to remove and install hardware components, and to accommodate the interface and power cable bend radius, there must be adequate space at the front and rear of the router. Allow at least 24 in. (61 cm) of space both at the front and the rear of the router.

See Also

Cabinet Requirements for ACX710 Routers

You can mount an ACX710 router in an enclosure or cabinet that contains a four-post 19-in. open rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association.

Table 4 provides the cabinet requirements and specifications for an ACX710 router.

Table 4: Cabinet Requirements for ACX710 Routers

Cabinet Requirement

Guidelines

Cabinet size and clearance

The minimum cabinet size for accommodating an ACX710 router is 19.5 in. (49.5 cm) deep. Large cabinets improve airflow and reduce the chance of overheating.

Cabinet airflow requirements

When you mount the router in a cabinet, ensure that ventilation through the cabinet is sufficient to prevent overheating.

  • Ensure that the cool air supply you provide through the cabinet adequately dissipates the thermal output of the router (or routers).

  • Ensure that the cabinet allows the chassis hot exhaust air from the chassis to exit the cabinet without recirculating into the router. An open cabinet (without a top or doors) that employs hot air exhaust extraction from the top allows the best airflow through the chassis. If the cabinet contains a top or doors, perforations in these elements assist with removing the hot exhaust air.

  • In the ACX710 router, air is pulled through the front of the chassis towards the fan tray, from where it is exhausted out of the chassis. Install the router in the cabinet in a way that maximizes the open space on the rear side of the chassis. This maximizes the clearance for critical airflow.

  • Route and dress all cables to minimize the blockage of airflow to and from the chassis.

  • Ensure that the spacing of rails and adjacent cabinets allows for proper clearance around the router and cabinet.

Rack Requirements for ACX710 Routers

The ACX710 routers are designed to be installed on two or four-post racks.

Table 5 provides the rack requirements and specifications for ACX710 routers.

Table 5: Rack Requirements for ACX710 Routers

Rack Requirement

Guidelines

Rack type

Use a four-post rack that provides bracket holes or hole patterns spaced at 1 U increments (1.75 in. or 4.45 cm), and ensure that the rack meets the size and strength requirements to support the weight of the router.

A U is the standard rack unit defined by the Electronic Components Industry Association (http://www.ecianow.org).

Mounting bracket hole spacing

Ensure that the holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm) so that the router can be mounted in any rack that provides holes spaced at that distance.

Rack size and strength

  • Ensure that the rack complies with the size and strength standards of a 19-in. rack as defined by the Electronic Components Industry Association (http://www.ecianow.org).

  • Ensure that the rack rails are spaced widely enough to accommodate the external dimensions of the router chassis. The outer edges of the front-mounting brackets extend the width to 19 in. (48.26 cm).

  • Ensure that the rack is strong enough to support the weight of the router. A fully configured ACX710 router weighs about 17.64 lb (8 kg).

  • Ensure that the spacing of rails and adjacent racks allows for proper clearance around the router and rack.

Rack connection to building structure

  • Secure the rack to the building structure.

  • If earthquakes are a possibility in your geographical area, secure the rack to the floor.

  • Secure the rack to the ceiling brackets and to the wall or floor brackets for maximum stability.