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• Ricardo Maiz

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9/2/2018

Nokia AirScale Outdoor Subrack (AMOB)

LTE Radio Access, Rel. LTE 17A, Operating Documentation, Issue 03 (HTML) > Nokia AirScale BTS > Nokia AirScale BTS Descriptions > Nokia AirScale System Module Product Description > Nokia AirScale System Module subracks

Nokia AirScale Outdoor Subrack (AMOB) AMOB description Nokia Product Code: 473952A The Nokia AirScale Subrack AMOB is a system module subrack intended for outdoor use. The subrack provides protection against the outdoor environment and foreign objects for the system module and cables (IP55). AMOB has a height of 8U and fits into a standard 19 in. rack. The AMOB subrack includes the AirScale System Module backplane. The subrack supports stack, wall, pole, and rack installation. It is possible to install AMOB inside the Flexi Cabinet for Outdoor (FCOA). AMOB can be stacked on top of Flexi casing, but Flexi casing stacking on top of AMOB is not supported. The AMOB cooling system is based on a heat exchanger (HEX) with an external air fan unit, as well as an internal air circulation fan unit. A clearance of at least 40 mm in the front and back must be provided for cooling. If AMOB is mounted horizontally, the direction of the external airflow for the HEX is back-to-front. In vertical installations, the airflow direction is front-to-back. The change in the airflow direction can be achieved by changing the orientation of the fans in the HEX fan tray assembly. The following clearances must be provided for the AMOB subrack: 600 mm in the front for module installation. 40 mm in the back for air flow. To allow for rear maintenance, a clearance of at least 200 mm is needed. In a vertical installation: 200 mm on top of and 300 mm below the subrack for cabling. In a horizontal installation: 300 mm on the left side and 300 mm on the right side for cabling. AMOB incorporates a heater that allows for a cold start from -40°C to -5°C in around two hours. Optionally, a second heater can be installed. The second heater provides the possibility of reaching -5°C in around one hour. Excluding the plug-in modules, the subrack weighs 23 kg (50.7 lb). The volume of AMOB is 104.5 l. AMOB can accomodate plug-in units in the following locations: https://online.networks.nokia.com/pic/infocenterproxy/lte17a_sp1_p8PDF/index.jsp

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Nokia AirScale Outdoor Subrack (AMOB)

One or two ASIA plug-in units in slots C1 and C2 (as shown in Figure: AMOB slot numbering) Up to six ABIA plug-in units in slots B1 to B6 (as shown in Figure: AMOB slot numbering) Figure: AMOB slot numbering

Figure: AMOB dimensions

AMOB internal Power Distribution Unit (PDU) https://online.networks.nokia.com/pic/infocenterproxy/lte17a_sp1_p8PDF/index.jsp

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Nokia AirScale Outdoor Subrack (AMOB)

The PDU combines power distribution and control functions related to the fans, heaters, and the temperature sensor. The PDU supports a maximum output of 42 A. Overvoltage protection is provided only for the DC input. Figure: AMOB internal PDU interfaces

Table: AMOB internal PDU interfaces Label

Function

Connector type

IN

Power input

AWG6 50A

OUT

Power output

1xAWG7 (positive) 1xAWG7 (negative)

HEATERS

Heater port

2x2-pin

TEST

Test access port

HDMI

SENSOR

Temperature sensor

2-pin

EXT FANS

Fan control

12-pin

Grounding

M5 screw

https://online.networks.nokia.com/pic/infocenterproxy/lte17a_sp1_p8PDF/index.jsp

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Nokia AirScale Outdoor Subrack (AMOB)

Id: DN09231912

© 2018 Nokia. All rights reserved.

https://online.networks.nokia.com/pic/infocenterproxy/lte17a_sp1_p8PDF/index.jsp

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