Electrical Installation; Si-Ethernet Module Information; Cabling Considerations; Module Grounding - Emerson Unidrive M700 User Manual

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
Spade
connector
Figure 4-2 shows the electrical connections of the RJ45 connector.
On the onboard Ethernet interface, pin1 is located on the left but on the SI-Ethernet
NOTE
module pin 1 is located on the right (as shown).
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.
12
Earth
connection
(SI-Ethernet
only)
8 7 6 5
Not used
Not used
Receive -
Not used
4 3 2 1
Transmit + Not used
Transmit - Not used
Receive + Receive -
Not used Not used
Link
LEDs
8 7 6 5 4 3 2 1
Transmit +
Transmit -
Receive +
Not used
SI-Ethernet User Guide
Issue: 1