User's Manual

75
Document Number: 0100SM1401 Issue: 12-16
Typical Radio Setup
Operational Description
The QH Hot Standby Controller (QHHSC) unit is a 1RU rack-mounted module that interfaces to two independent full duplex
radios (each 1 RU rack mounted modules) via a number of RF and data cables.
Both full duplex radios (Radio A & Radio B) operate simultaneously, constantly receiving radio signals. However only data from
one radio (the “online” radio) is directed to the user equipment. The online radio is also the only unit transmitting at any time.
The Hot Standby Controller provides the following functions:
• Amplify and split the incoming signal so both Radio A and Radio B receive simultaneously.
• Monitor the alarm output from both Radio A and Radio B and change over the online radio if required.
• Switch all user data through to the online radio.
• Switch the antenna, via internal coaxial relay, to the online radio transmitter (Requires QHHSC Kit Option A).
Digital switching in the QHHSC directs data to and from the user ports on the front panel directly to the user ports of the
online radio.
The QHHSC and the two full duplex radios pass operational/alarm detection status between one another via the AUX
interface. Any alarm detection indicated from the online radio can cause the QHHSC to change over the online radio.
Part F – Quick Reference Guide
Schneider Electric offers a variety of wireless accessories, for further information, refer to the wireless accessories data sheet.
QH
Mounting
The QH hot standby full duplex radio is housed as a 3 RU 19 in. rack mounted set, encompassing two x 1 RU QB full duplex
radios and one x 1 RU QH Hot Standby Controller. The Controller and full duplex radios are each supplied with two x 1 RU
mounting brackets, are to be fitted to each sides of each unit before it can be installed into a 19 in. rack. The mounting
brackets can be fitted to the side of each unit in 3 different locations to provide different mounting capabilities: Front Mount,
Proud Mount or Center Mount. Refer to the QB Mounting guide for a graphical representation of the different mounting
positions.
The unit should be mounted in a clean and dry location, protected from water, excessive dust, corrosive fumes, extremes of
temperature and direct sunlight. Provide sufficient passive or active ventilation to allow the full duplex radio fans to pass air
through the internal heat sink efficiently.
All RF, power and digital I/O connections are made at the rear of the unit. All user interfaces are located at the front of the
unit, these include: Ethernet interface, Serial COM port interfaces and Auxiliary interfaces.