User Manual

PLUS System Manual Overview 13
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One 10/100/1000 Mbps card for LAN connectivity
1.3.3 Ethernet Cable
The SDP and Reader components must be connected with 24-gauge CAT 5e shielded cable or
better. This grade of cable is required for readers to perform according to specifications. Avoid
breaking cable continuity by routing through breakout or junction blocks. If it is necessary to break
cable continuity, shield integrity should be maintained across the interconnect. Avoid using
connectors that rely on a crimp connection to maintain ground wire integrity; instead, use cables on
which the ground wire is soldered to the shielded connector.
1.3.4 PS/2 Serial Adapter Cable
If you wish to connect to a reader through its serial port to change IP addresses, you will need a PS/2
male cable connection to connect to the Reader. This is typically accomplished with a DB-9 to PS/2
serial adapter. One serial adapter cable is included in each PLUS software / documentation package.
TIP: Many PCs and laptops no longer come with DB-9 connectors, so you may also need a
USB to DB-9 adapter.
1.3.5 Reader Power Supplies
Readers that are run independently of an SDP, or Readers that are added onto a daisy chain and
exceed the SDP power delivery capacity, must be powered from an external 48V power supply.
Reader daisy chain configurations requiring external power are detailed later in this document.
Reader power supplies are available for purchase from Time Domain.
1.3.6 Ethernet Switch
A user-supplied Ethernet switch is needed to aggregate traffic from the Reader network and deliver it
to the Location Engine server. For full-scale PLUS deployments, the following specification are
recommended for the Ethernet switch connected to the SDP.
DRAM/flash memory 32MB DRAM 16MB flash memory
Switching capacity 8.8 Gbps
Forwarding rate 6.6-Mpps wire-speed
Switching Protocol Layer 2 Switching
Small-scale systems with low data bandwidths (only a few tags) can generally use any
consumer grade Ethernet switch or hub without impact.