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174 Chapter 12 Installing the Companion system
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There are two versions of the RPI unit:
• The RPI-8 BIX UL supports a maximum of eight base stations.
• The RPI-16 BIX UL supports a maximum of 16 base stations.
Each RPI has a connection printed-circuit board and either one (RPI-8 BIX UL) or two (RPI-16
BIX UL) power supply units (PSUs). The maximum input power consumption of an RPI is 240 W.
If you use a UPS 48 V dc backup source, the maximum input power requirement of the RPI is
140 W.
You can upgrade an RPI-8 BIX UL to an RPI-16 BIX UL by installing a second PSU to the RPI-8
BIX UL.
If you distribute the RPIs around the site, the number and type of RPIs depend on where you place
them and how you power the base stations.
To determine how many base stations and how many PSUs you need for the number of base
stations, use the following table:
Mounting the RPI unit
When you mount the RPI unit, ensure you follow these guidelines:
• To provide acceptable ventilation and to prevent overheating, leave a clearance of a minimum
of 125 mm (5 in.) around the RPI.
• If you are installing two RPIs, one above the other, leave a clearance of a minimum of 300 mm
(12 in.) between them to provide acceptable ventilation and to prevent overheating.
• Install RPIs a minimum of 300 mm (12 in.) from the ceiling.
Table 36 RPI Requirements
Base stations RPI-16 and RPI-8 required PSUs required
1–8 1 RPI-8 1 PSU
9–16 1 RPI-16 2 PSUs
17–24 1 RPI-16 and 1 RPI-8 3 PSUs
25–32 2 RPI-16 4 PSUs