American Fibertek N-TAH - Manual (Page 16)

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Commander devices, on the same network as the N-TAH. Up to two independent
actions can be taken by an N-TAH in response to a local alarm condition.
Local actions – where a local alarm condition is set to activate an aux contact output on
the same local unit – will be taken immediately.
Remote actions – where a local alarm condition is set to trigger an aux contact on
another unit – are stored in a queue and acted on sequentially. The N-TAH will for each
queued action attempt to open a connection to the target device and send it a command
to take the set aux output action. If it fails to connect, or fails to get a confirmation
response from the target device, it will retry the action after a 5 second delay. The N-
TAH will attempt to take an action 15 times before abandoning it.
The user may also set up to two messages to be sent to specified IP addresses for each
alarm input. Separate messages can be specified for alarm detection and alarm
clearing.
The N-TAH will also send messages to up to four Pilot servers on alarm input change,
as well as periodic updates of all alarm and aux status. These messages can trigger
events in the CMS Pilot Software.
Aux outputs
The N-TAH makes two aux contact outputs available to devices on the network. Any
device on the network (with a properly formatted and authenticated message signal) can
connect to a port on the N-TAH and trigger one of those output ports to change state.
The N-TAH will verify that the indicated aux output did in fact change state and will
respond to the device which sent the message to confirm. The N-TAH ’s aux outputs can
accept state change commands from any number of sources.
The N-TAH outputs are controlled by relays. The user can set, through the configuration
web page, the behavior for the contacts to take when power is applied to the unit after a
power outage. The output can be configured to switch on or switch off. Switching off is
the default condition. The contact will turn off on power loss, this cannot be changed.
The aux output can also be manually controlled by the user through the configuration
web page. The web page will indicate the current state of the aux output and permit the
user to change that state.
The N-TAH will also send messages to up to four Pilot servers on aux contact output
change, as well as periodic updates of all alarm and aux status. These messages can
trigger events in the CMS Pilot Software.
Watchdog function
The N-TAH has a watchdog feature which allows it to monitor the function of up to two
network connected devices. The N-TAH can monitor a network device by periodically
sending ping requests to the device over the network. After a number of pings without
responses from the target device, the N-TAH takes an action which can be configured by
the user. This action can consist of either setting an aux contact output on the N-TAH