When installing on poles without lightning protection systems, the ODU or external antenna should be placed on the pole at a height that is at least 1 meter below the top of the pole. In this case, there is a significant probability that the lightning strikes the pole and not the ODU or antenna. The pole should be properly grounded: connected to the building lightning protection circuit according to your local regulations. When lightning strikes the external antenna, the current goes through the coaxial cable to the ODU case, which is connected through the ODU clamp to the pole - the pole is grounded. The direct lightning strike to the FTP service cable (ODU-IDU) is partially terminated on the grounded IDU case. Partial termination means that the direct lightning strike will probably destroy an FTP cable. The service cable pickups from the electromagnetic impulses are terminated on the IDU case by the winding shield, and further - on the IDU grounding.

IDU is grounded via a three-conductor power cord and a grounded socket. The data & power wires pickups are terminated via IDU protection scheme (three-conductor power cord and a grounded socket).

Special attention should be paid if the antenna used is not DC-shorted. In this case, an additional lightning arrestor should be used between the antenna and ODU.

Grounding diagram is shown in the picture below.

AUX-ODU-INJ-G is an optional accessory, which may be used to connect third-party DC power sources to the ODU (for example, to power the unit from solar power or wind power sources).

AUX-ODU-INJ-G should be properly assembled, mounted and grounded.

AUX-ODU-INJ-G Mounting

AUX-ODU-INJ-G can be can be installed on a pole, using hose clamps (2). Attach the grounding cable (min cross-section 2.5 mm²) to the case, using grounding bolt (3).

AUX-ODU-INJ-G Cable Gland Assembly

In order to ensure that the cable gland remains sealed under any environmental conditions, please, follow the assembly sequence according to procedure below:

1) Put the cable gland nut (1), the split sealing grommet (2) and the cable gland threaded coupling (3) onto the cable FTP Cat5e

2) Crimp the connector onto the cable using the crimping tool:

• For connection to "ETH IN" terminate the cable with the unshielded RJ-45 connector (4) according to the EIA/TIA-568B
• For connection to "ETH OUT" terminate the cable with the shielded RJ45 connector (5)  according to the EIA/TIA-568B (to provide grounding circuit)
• For connection to "PWR" terminate a cable with the power connector (6).

3) Insert the connector of the pre-terminated cable into the corresponding socket until you hear a click.

4) Screw the cable gland threaded coupling (3) into the port and tighten it. Do not apply excessive force.

5) Tighten the sealing grommet (2) by the cable gland nut (1). Do not apply excessive force.

Power connector scheme is below

Follow requirements:

1. Press on these catchers (1) when the cable is terminated;
2. Use the round cable with diameter from 5mm to 6mm with conductor cross-section from 0.5mm to 2.5mm;
3. FTP Cat5e cable may be used.

AUX-ODU-INJ-G Grounding Scheme

The grounding and lightning protection initial procedures when using AUX-ODU-INJ-G are similar to those when using regular IDU. 

AUX-ODU-SYNC Mounting

AUX-ODU-SYNC can be installed on a pole, using fasteners from the delivery package:

1. Screw the threaded rod to the unit case.
2. Tighten the device and the bracer on the pole and fix them by the threaded rod using the nuts and washers as shown at the picture
3. Attach the grounding cable to the unit case using the grounding bolt.

AUX-ODU-SYNC Cable gland Assembling

In order to ensure that the cable gland remains sealed under any environmental conditions, please, follow the assembly sequence according to the procedure below:

1. Put the cable gland nut (1), the split sealing grommet (2) and the cable gland threaded coupling (3) onto the cable

2. Crimp the connector onto the cable using the crimping tool:

   CAUTION

   Make sure that the connector is well-crimped. A loose connector can damage the device. Please note that such damage is not covered by the warranty. 

   1. For connection to the port Power terminate the FTP Cat.5e cable with the unshielded RJ-45 connector (4) according to the EIA/TIA-568B. Do not use the shielded RJ-45 connector on this end of the cable as it should be attached on the IDU end (to provide grounding circuit)
   2. For connection to the ports 0-6 use the ready-assembled specialized CAB-SYNC or CAB-SYNC-E (5) cables
3. Insert the connector of the pre-terminated cable into the corresponding socket until you hear a click
4. Screw the cable gland threaded coupling (3) into the port and tighten it. Do not apply excessive force
5. Tighten the sealing grommet (2) by the cable gland nut (1). Do not apply excessive force.

AUX-ODU-SYNC Connection to ODU

To connect AUX-ODU-SYNC to the units use the ready-assembled specialized CAB-SYNC cables for InfiMAN 2x2 and InfiLINK 2x2 PRO devices or CAB-SYNC-E cables for InfiMAN Evolution base station sectors. CAB-SYNC and CAB-SYNC-E must be ordered additionally. Information about CAB-SYNC and CAB-SYNC-E cables is available at Infinet web site in the "Accessories" section.

InfiMAN 2x2 and InfiLINK 2x2 PRO

To connect AUX-ODU-SYNC to ODU insert the INFINET connector of the CAB-SYNC cable to the console port of ODU and tighten the cap nut.

InfiMAN Evolution base station sector

To connect AUX-ODU-SYNC to ODU insert the RJ-45 connector with INFINET cable gland of the CAB-SYNC-E into the corresponding socket of the ODU until you hear a click. Perform the device port insulation with a cable gland as instructed above.