Challenger10 Installation and Quick Programming Manual
3
Earthing of panels in a single building.
In a single building several cabinets or
devices are earthed. A licensed electrician should check the integrity of the
building earth system.
Earthing of panels in more than one building.
If the wiring extends to separate
buildings, use more than one common earth system. Install LAN isolation
devices, such as TS0893, to isolate the system LAN between buildings to protect
the system against differences in earth potential. See Figure 3 on page 7.
Guidelines for retrofitting a Challenger V8 system
When replacing a Challenger V8 panel with a Challenger10 panel in an existing
installation:
• Where used, a device’s GND or EARTH link must be removed (if fitted).
Note:
Challenger10 panels do not have a GND link.
• Where 230/16 VAC plug packs are used, connect the earth conductor to the
device’s power earth terminal (similar to Figure 5 on page 11, item 3).
• Connect one end only of the RS-485 data cable shield to a device’s LAN
earth terminal or earth lug (similar to Figure 5 on page 11, item 1).
• All other wiring compliant with Challenger V8 earthing recommendations via
Communications Earth Terminal (CET) may remain unchanged.
Guidelines for new Challenger10 installations
When installing a Challenger10 panel in a new installation, follow the wiring
requirements of this manual including:
• Where used, a device’s GND or EARTH link must be removed (if fitted).
Note:
Challenger10 panels do not have a GND link.
• Where 230/16 VAC plug packs are used, connect the earth conductor to the
device’s power earth terminal (similar to Figure 5 on page 11, item 3).
• Connect one end only of the RS-485 data cable shield to a device’s LAN
earth terminal or earth lug (similar to Figure 5 on page 11, item 1).
• Connections to building earth via CET are no longer required.
Note:
For new installations the earthing and configuration instructions in this
manual supersede all previously-released installation instructions supplied with
other devices (unless otherwise noted).
RS-485 LAN cabling
The cabling recommendations for the two RS-485 system LANs are:
• Use 2-pair twisted shielded data cable such as Belden 8723.
• In each segment of LAN cabling, connect one end only of the data cable
shield to a device’s LAN earth terminal. Join data cable shields where cable
extends past a device that doesn’t have a LAN earth connection.
• The length of the LAN cable run should not exceed 1.5 km, unless LAN
isolation devices are used to extend the distance.
