Ametek 90B Series Installation And Configuration Manual page 80

Single Input I/O board (Option 2S)
This is selected whenever window size option 2S (two point windows with single
input per I/O board) is selected. The standard I/O board has two inputs available,
but in certain configurations, as listed above, it is necessary to only activate a
single input on this module.
Dual Relay (Option 2RR)
This will provide two repeat relay outputs (each selectable for Form A or Form B
operation) for every input. This is only available whenever window size option 1
(single point windows) or 2S (two point windows with single input per I/O board)
are selected.
Flash Synch Master (Option FS)
A software selection box is provided for flash synchronization between several
different SERIES 90B Annunciators. In systems that require flash
synchronization, one Annunciator is configured as the Master (box checked) and
all others are configured as the Slave (unchecked). Wiring between the
Annunciators is required to share the flash signals. (Reference the Common
Service Cell Wiring diagrams.)
In systems that don't require flash synchronization, the Flash Sync Master box
must be checked. When setting up a system for flash synchronization, the flash
lamp rates should be configured as follows: (reference the Lamp Configuration
Screen)
Master and Slave Lamp Flash Rates should be identical except, on the Slave
units, set the Slow Flash 'On' time approximately 0.1 sec lower than the Master.
This ensures the slave unit is ready and waiting for the sync edge from the
master.
Set the Slow and Fast rates in even multiples. (Example: Slow Flash = 1.0 sec,
Fast Flash = 0.5 sec). Use of intermittent flash is not recommended.
Use alarm sequences that are either identical between master/slave units or
ones that share the same flash rates (slow, fast, etc.)
Note: If a Slave unit does not receive the flash synchronization signal from the
Master unit, the slow flash will become steady on.
68 Series 90B