User's Manual

3. Functional Description

Page 20 MF0200A5C_ION-U_L_7_80-85_17EP_19P.docx Manual for ION

-U

Mains Connector

The RU receives its power through the Mains connector . The type of connector is

dependent on the RU model. A 4-pin Amphenol connector is used for AC models and

standard DC models. A 7-pin Amphenol connector is used for DC models powered

by a dual cable supply.

Antenna Port

The RU has one duplex 4.3-10 (1-st generation RUs: N-female) antenna port for

transmitting and receiving signals to and from distributed antennas. This RF port can

be connected directly to an antenna (i.e. using RF jumper cables) or through splitters,

allowing additional antennas to be fed by the RU.

Probe

This port is used as measurement probe to antenna port.

Local Port RS-232

The RS-232 port is standard DB-9 female connector used for external modem

communication with an optional Extension Unit.

Status LED

The status LED provides a visual warning of an alarm condition. The color of the

LED indicates the severity of the alarm.

Pwr/Ctrl Connector

The Pwr/Ctrl connector supports an optional fan unit. The RU provides power and

fan speed control to the fan unit and receives alarms from it through this 7-pin Binder

connector.

Alarm Connector

The RU has two alarm relay inputs that can be used to monitor and report alarms

from external devices. The alarm connector is a 5-pin Binder connector.

Expansion Ports

The Expansion UL and Expansion DL ports are QMA female connectors that

are used to connect to a CommScope EU to provide additional bands.

Optical Ports

The LC-APC optical connectors are used to send and receive the signals between

the RU and the Master Unit’s OTRx modules.

 The DL optical port receives downlink signals from the MU OTRx.

 The UL optical port transmits uplink signals to the MU OTRx.