14
SI-Ethernet User Guide
Issue: 3
4
Electrical installation
4.1
SI-Ethernet module information
SI-Ethernet provides two standard RJ45 UTP/STP (
Un-shielded/Shielded Twisted Pair
)
connections to a 100 Mbs Ethernet system. In addition to the RJ45 connectors, a grounding tag is
supplied for supplementary bonding. SI-Ethernet provides 2 diagnostic LEDs for status and
information purposes located on the module topside.
Figure 4-1 SI-Ethernet
Figure 4-1 shows an overview of the module connections and indicators.
Figure 4-2 Ethernet connections
Figure 4-2 shows the electrical connections of the RJ45 connector.
4.2
Cabling considerations
To ensure long-term reliability it is recommended that any cables used to connect a system
together are tested using a suitable Ethernet cable tester, this is of particular importance when
cables are constructed on site.
Any isolated signal circuit has the capability to become live through accidental contact with other
conductors; as such they should always be double-insulated from live parts. The routing of network
and signal wires should be done so as to avoid close proximity to mains voltage cabling.
4.3
Module grounding
SI-Ethernet is supplied with a grounding tag on the module that should be connected to the closest
possible grounding point using the minimum length of cable. This will greatly improve the noise
immunity of the module.
On the onboard Ethernet interface, pin1 is located on the left but on the SI-Ethernet
module pin 1 is located on the right (as shown).
Earth
connection
Link
LEDs
N
ot used
1
2
3
4
5
6
7
8
N
ot used
Tr
R
N
ot used
Transmit -
Receive -
N
ot used
N
ot used
1
2
3
4
5
6
7
8
N
ot used
Tr
R
N
ot used
Transmit -
Receive -
N
ot used
S
pade
connector
NOTE
Содержание Unidrive M600
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