Service and troubleshooting
EST3 Installation and Service Manual 8.35
Signature data circuit (SDC) operation
The advanced features of the Signature controller module
perform a number of advanced operations. These operations are
not always apparent from the panel controller. Table 8-26 lists a
number of SDC conditions and describes the circuit’s operation.
Table 8-26: SDC operation
Condition Operation
Remove a detector, then
re-install the same detector in
the same base.
1. The system displays a trouble with the detector’s label or
address when the detector is removed.
2. The system restores completely when the detector is
re-installed in its original base.
Remove a module or pull
station, then re-install the
same device in the same
location.
1. The system displays a trouble with the module’s label or
address when the device is disconnected.
2. The panel restores completely when the device is re-installed
in its original location.
Remove a detector, then
re-install a different detector of
the same type in the same
base.
1. The system displays a trouble with the detector’s label or
address when the detector is removed
2. When the new detector is installed, the Signature controller
module re-maps the circuit, replacing the S/N of the old
detector with the S/N of the new detector. All the old
detector’s sensitivity and verification settings are transferred
to the new detector. The system will return to normal when
mapping is finished.
Remove a module or pull
station, then re-install a
different device of the same
type in the same location.
(SIGA-UM replacement
modules must have jumper
JP1 set in the same position
as the original module.)
1. The system displays a trouble with the device’s label or
address when the device is disconnected.
2. When the new device is installed, the Signature controller
module re-maps the circuit, replacing the S/N of the old
device with the S/N of the new device. If the devices are
modules (not pull stations), the old module’s personality
codes are transferred to the new module. The panel will return
to normal when mapping is finished.
Remove a detector, then
re-install a different type
detector in the same base.
1. The system displays a trouble with the detector’s label or
address when the detector is removed.
2. When the new detector is installed, the Signature controller
module re-maps the circuit, replacing the S/N of the old
detector with the S/N of the new detector. All the old
detector’s sensitivity and verification settings (when
applicable) are transferred to the new detector. The new
detector will be operational, however the panel will be in
trouble, indicating a device type mismatch. The System
Definition Utility program must be used to re-assign the device
type to get the system out of trouble.
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