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ACX7100-48L Site Guidelines and Requirements

General Site Guidelines

Efficient device operation requires proper site planning and maintenance and proper layout of the equipment, rack or cabinet (if used), 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 prescribed airflow guidelines to ensure that the cooling system functions properly and 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.


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


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.

Some of the problems caused by strong sources of electromagnetic interference (EMI) are:

  • 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 ACX7100-48L Routers

The ACX7100-48L router chassis is a rigid sheet-metal structure that houses the hardware components. Table 2 summarizes the physical specifications of an ACX7100-48L router and its components.

Table 2: Physical Specifications for ACX7100-48L Router Chassis and FRUs







1.75 in. (4.45 cm)

17.36 in. (44.09 cm)

Without fan module and power supply module (PSM) handles: 23.42  in. (59.5 cm)

With fan module and PSM handles: 24.94 in. (63.88 cm)

  • With FRUs installed: 26.94 lb (12.22 kg)

  • With no FRUs installed: 20.54 lb (9.32 kg)

Fan module

1.61 in. (4.10 cm)

1.64 in. (4.18 cm)

4.07 in. (10.34 cm)

0.28 lb (0.13 kg)


1.58 in. (4.01 cm)

2.14 in. (5.43 cm)

12.65 in. (32.13 cm)

2.33 lb (1.05 kg)


1.57 in. (4 cm)

2.14 in. (5.43 cm)

12.65 in. (32.13 cm)

2.40 lb (1.09 kg)

Environmental Requirements and Specifications for ACX7100-48L Routers

The router must be installed in a rack or cabinet. The router 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 provides the required environmental conditions for normal router operation.

Table 3: ACX7100-48L Router Environmental Tolerances




No performance degradation up to 6,000 feet (1,829 meters)

Relative humidity

Normal operation ensured in relative humidity range of 5% through 90%, noncondensing.

  • Short-term operation ensured in relative humidity range of 5% through 93%, noncondensing.


    As defined in NEBS GR-63-CORE, short-term events can be up to 96 hours in duration but not more than 15 days per year.


  • Normal operation ensured in temperature range of 32° F through 104° F (0° C through 40° C).

  • Non-operating storage temperature in shipping container: –40° F through 158° F (–40° C through 70° C).


Complies with Zone 4 earthquake requirements according to NEBS GR-63-CORE.


Install ACX Series devices only in restricted-access areas, such as dedicated equipment rooms and equipment closets, in accordance with Articles 110-16, 110-17, and 110-18 of the National Electrical Code, ANSI/NFPA 70.

Grounding Cable and Lug Specifications for ACX7100-48L

For installations that require a separate grounding conductor to the chassis, you must ground the router properly before you connect power to ensure proper operation and to meet safety and electromagnetic interference (EMI) requirements. To ground an ACX7100-48L router, connect a grounding cable to earth ground, and then attach the grounding cable to the chassis grounding points.


The router is a pluggable type A equipment installed in a restricted-access location. It has a separate protective earthing terminal provided on the chassis and on the DC power supply module in addition to the grounding pin of the AC power supply cord. You must keep this separate protective earthing terminal permanently connected to earth ground for installations that require a separate grounding conductor to the chassis.


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.


Before you install the router, a licensed electrician must attach a cable lug to the grounding cables that you supply. See Connect Earth Ground to ACX7100-48L Routers. A cable with an incorrectly attached lug can damage the router.

Before you connect the router to earth ground, review the following information:

  • The grounding points are in the form of studs sized for M5 pan head screws. You need to provide these screws with integrated washers as we do not ship them in the accessory kit.

  • For ACX7100-48L routers, the grounding lug required is a Panduit LCD10-10A-L or equivalent. The grounding lug accommodates 14–10 AWG (2–5.3mm²) , stranded wire.

Clearance Requirements for Hardware Maintenance of ACX7100-48L Routers

When planning the site for installing an ACX7100-48L router, you must allow sufficient clearance around the installed chassis (see Figure 1).

Figure 1: Clearance Requirements for Airflow and Hardware Maintenance for ACX7100-48L RoutersClearance Requirements for Airflow and Hardware Maintenance for ACX7100-48L Routers
  • For the cooling system to function properly, the airflow around the chassis must be unrestricted. See Cooling System and Airflow in ACX7100-48L Routers for more information about the airflow through the chassis.

  • If you are mounting an ACX7100-48L router in a rack that has other equipment installed, 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.

Rack Requirements for ACX7100-48L Routers

ACX7100-48L routers are designed to be installed on four-post racks. Table 4 provides the rack requirements and specifications for ACX7100-48L routers.

Table 4: Rack Requirements for ACX7100-48L Routers

Rack Requirement


Rack type

Use a four-post rack that provides bracket holes or hole patterns that are 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.

A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association.

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 that are spaced at that distance.

Rack size and strength

  • Ensure that the rack complies with the standards for a 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association.

  • Use an 800-mm rack as defined in the four-part Equipment Engineering (EE) European telecommunications standard for equipment practice (document numbers ETS 300 119-1 through 119-4) published by the European Telecommunications Standards Institute (

    The horizontal spacing between the rails in a rack that complies with this standard is usually wider than the device's mounting brackets, which measure 19 in. (48.26 cm) from outer edge to outer edge. Use approved wing devices to narrow the opening between the rails as required.

  • 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 for four-post installations, the front and rear rack rails are spaced between 23.6 in. (60 cm) and 36 in. (91.4 cm) front-to-back.

  • Ensure that the rack is strong enough to support the weight of the router. The fully configured ACX7100-48L router weighs about 26.94 lb (12.22 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 wall or floor brackets for maximum stability.