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INM 725B Rev 21
1 .16 Integral Pushbutton Module
On standard systems the pushbutton / programming module is located in the bottom
right hand corner of the annunciator when viewed from the front.
If advised at time of order the pushbutton module can be located in any alternative
cell within the annunciator.
1 .17 Pushbuttons
Six Pushbuttons:- Lamp Test, Systems Test, Mute, Ack, Reset and First Reset, are
available to allow the user to control any of the customer selectable ISA sequences.
Some users prefer to lock out specific pushbutton functions and any of the integral
pushbuttons can be disabled in software.
A typical example is first reset where the user prefers to use a remote key switch to
reset the first up indication in place of the integral pushbutton.
1 .18 Watchdog Monitoring LED’s
As alarm annunciators are used in safety critical applications it is important that that
the functions of the annunciator are also monitored and the RTK 725B is equipped
with an extensive self diagnostic facility and four green status LED bars are used
to provide dynamic monitoring of logic power, field contact supply, watchdog and
communications states.
The LED’s indicate
1. PWR = 24VDC logic power to individual cards
2. FC
= Field contact power & contact loop resistance monitoring
3. COM = Communications
4. WD = Watchdog monitoring of individual cards
When power is initially applied to the unit the four green LED bars illuminate in a
rotational sequence whilst the system verifies that all of the expected cards are
present and once the start up routine is complete the LED’s stay ON if all functions
are fully operational.
