Simplex 4100ES - Page 236

G-2
Appendix G
General Guidelines
General
Guidelines
Review the guidelines below before initiating an Earth Fault Search.
• The Detect Earth Fault jumper must be installed at each SPS, RPS, TPS, IPS, or 4009T for
earth fault detection to occur.
• Only one power supply per location is configured to detect earth faults.
• For more reliable earth fault searching:
- Use a Firefighter Telephone NAC for each telephone riser connection to a transponder.
- Use IDNet channel isolators to isolate channel faults to a specific segment of channel
wiring.
- Set IDNet channel isolator addresses to the lowest IDNet device addresses, increasing
with communication distance from the IDNet card.
• If an earth fault is suspected on the IDNet channel with multiple isolators, start an IDNet
Channel Search before doing a Location Search. If the Location Search is done first, it
may not yield the correct location (this is a by-product of the extended amount of time
required for the IDNet channel to initialize during a Location Search). Note: The 4009
IDNet NAC Extender has a common ground fault trouble that reports to the panel without
running the Earth Fault Search.
• Earth Fault Search detects only one fault at a time. Multiple faults require fixing the first
fault and then repeating the search.
• The FACP suspends normal operation for the duration of the Earth Fault Search.
• Location Earth Fault Searches optionally allow exclusion of auxiliary power circuits from
the search, so that modules connected to the 24 V auxiliary outputs can remain in
operation during the search.
• The option to exclude auxiliary power circuits does not apply to IDNet devices, because
the entire IDNet communication channel is isolated during each search.
• During the search, all related troubles are suppressed and a single trouble pseudo-point is
activated (P438).
• At the completion of the search, all slaves are restarted and normal panel operation
resumes.
• Earth Fault Search is only supported by new 4100ES modules. 4100 Legacy (slot format)
modules are not supported, with the following exceptions:
- MAPNET channel isolation during location search
- IPS for earth fault detection (not recommended). The Earth Fault Search may fail
because the isolation circuits of some 4100ES slaves (such as the 4100ES telephone
slave) do not support IPS.
IMPORTANT: The fire panel cannot provide fire protection during an
Earth Fault Search.