NEX7250 Zone 2 Annunciator
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21.3 Programming Example
Example:- If channel 7 is currently set to manual reset but the user would like to change this to allow
the window to automatically reset, (after acknowledge), the following procedure should be followed.
1. First hinge down the pushbutton module to access the programming plate.
2. Place the unit into (CONF), programming mode, using the yellow switch to the left of the
display
3. Use first reset / reset pushbuttons to select function 3 (reset function)
4. Use the system test / lamp test pushbuttons to select channel 7 and note the associated
window will fast flash.
5. Use the mute / ack pushbuttons to enable function F3 which is confirmed when the status
LED is on.
6. Scroll to the next channel up or down to store the required setting using the system test /
lamp test pushbuttons.
7. Return to normal operation by placing the CONF switch to the off state
21.4 Checking Programmed Settings
After all of the required functions have been set on the unit it is recommended that the user checks
the configuration to avoid problems during the commissioning stage. This is a simple process that
should only take a few minutes and is achieved by placing the unit into the “CONF” mode and
scrolling through each channel noting that as each Function is selected the status LED is on if
enabled or off if disabled. When functions such as F23 (Critical horn group HNA) are selected all
windows selected to operate the relay are illuminated in a steady on state to help the user identify
which alarms are within the horn group. Please note:- A window selected for programming
automatically fast flashes therefore the window of the channel that is being programmed cannot be
viewed to determine status information. The status LED on the information plate can be used as an
alternative to view the setting for this channel, if the status LED is on the function has been enabled,
or the user can move to an adjacent channel to allow the alarm window to be used in the normal
way.
21.5 Systems With Unarmed Ways
Each dual alarm card in the system is provided with a unique binary address, which is set using on
board DIL switches during manufacturing. If the system has been supplied with unarmed ways the
address normally used for the associated channels will be reserved to allow the user to add the card
at a later date. The programming module is designed to stop navigating between channels when it
detects a missing card address (normally the last card in the system). When the channel navigation
stops because of unarmed ways it is necessary to “jump over” the missing address to access any
further channels. To “jump” an address the user needs to hold down the reset pushbutton and then
press and hold the "channel up or down" pushbutton.
21.6 Points To Note When Programming
Alarm channels are always numbered in a standard format depending on window size and the
channel up / down pushbuttons are used to automatically move between each channel in the
correct order. The selected feature is only stored when the user selects an adjacent channel (either
going up or down). After the programming is complete it is recommended that the user checks the
required functions have been enabled correctly. After programming it is recommended that any
channels that have been changed are tested to ensure that the operation is in line with the required
functions. The programming process includes an inbuilt comprehensive error checking routine. In
applications where there is extreme electrical noise this may result in the program not being
accepted. If this happens, simply repeat the process for that particular alarm channel.
