EM-LON Operating Manual / Leaflet no. M375EV4 (3/2013)
12
For installation, wiring, and commissioning
observe the recognised technical regulations,
especially safety and accident prevention
regulations.
For any wiring work follow the national and
local regulations and guidelines for electrical
installation.
Danger!
Danger of electric shock! Do not touch any
live components! Electrical equipment
carries a dangerous electrical voltage
during operation.
• Only skilled qualified electricians are
allowed to work on the electrical system.
• Switch off the power supply before
working on any electrical equipment.
Making connections
The EM-LON PCB has terminals for two bus cables
of a LonWorks network. Depending on the network
topology, controllers at the end of a chain may be
connected to one bus, controllers at other positions
in the chain may be connected to two buses.
Strip the insulation from at least two wires of the bus
cable, insert the bare wires into the terminals and
tighten the screws.
• Fix the bus cable to the casing using the wire
clamping bracket.
• Connect the shield of shielded cables to the
SH terminals. Within a chain (channel) connect
the shield only at one point with the earth.
Earthing the shield at every controller will
lead to interferential voltages.
• To avoid reflections at the end of a chain
(channel) use a terminator.
Recommended bus cables
Bus cables to TIA 568A, category 5
• Belden 8471 or 85102
• Cables to DOCSIS specification level IV
• JY(St)Y 2×2×0.8 (use only twisted pair for
LON-A and LON-B)
1
2 3 4
1
2 3 4
1 Bus
2 LON-B
3 LON-A
4 SH (shield)
7
Wiring
