AFi N-111, Руководство пользователя

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An option is available to only permit incoming TCP/IP connections from a specific
source. If the user specifies an IP address for a server mode port, only connections
from that port will be accepted.
Serial Client Mode
In Serial Client mode, the N-111 will actively attempt to connect to a pre-defined server
device over the network. When a valid IP address and target port are set through the
configuration screen, the N-111 will attempt to open a TCP/IP connection to that
address. Once a connection is made, serial data received on that hardware serial port
will be transmitted to the target server device, and data returned by the target server
device will be returned to the hardware serial port.
Data flow between the hardware port and the TCP/IP connection is bidirectional. The
rate at which data on the RS232 port is transmitted and received can be set through the
configuration web page. If the port is configured as an RS232 or 4 wire RS485 data flow
may be full duplex. A port configured as 2 wire RS485 must operate in half duplex,
where data reception will be inhibited while data is being transmitted out by the port.
Each serial port can only send data to a single target server address at once. If the
connection to the target server is lost, the N-111 will immediately attempt to reconnect.
If the reconnect attempt fails, the N-111 will retry every 60 seconds afterwards to re-
establish the connection.
Alarm input forwarding
The N-111 has a contact input which can be connected to customer supplied contact
closure devices such as motion detectors or door switches. This alarm input can be
linked through the N-111 to trigger the aux contact output on that device, or another N-
111 device or other VNES devices elsewhere on the network.
The conditions which will be considered an alarm can be set through the configuration
web page. Thus the N-111 can be used with alarms where a contact is broken (such as
a wire break or emergency stop switch) or where a contact is made (such as a motion
detector). The minimum duration that the contact must be made or broken before an
alarm is registered can also be set by the user, so that the user can set an alarm to
trigger only if an alarm condition has been present for a certain amount of time.
The aux input may also be configured to operate in ‘supervised’ mode, where the
contact will only be triggered when a 1K resistance is detected across the input. Either
an open circuit or a short circuit will be detected as no contact made. This can be set by
the user through the configuration screen.
When an alarm is triggered, the N-111 can be set to activate aux output contacts either
on that same N-111, or on other N-111 or VNES devices on the network. The user can
set which output to set and whether to turn it on or off in response to the triggered alarm.
The user can also set the target aux contact out to be set on or off for a specific duration
in response to a local alarm condition. Alternately the user can set the target aux
contact out to be set on or off indefinitely in response to a local contact, so that a local