
Maintenance Manual________________________________________________________________
100 _________________________________________________________________ M210886EN-G
Check List before Connecting
Before opening a connection to a field device, study carefully the check list
presented in
Table 48
IO Terminal: Checklist before Connecting to Field
Devices
Question
Source of Information
Action
Is there a separate
maintenance line to the
field device?
Airport-specific
documentation
If there is a separate
line, use the
maintenance line to
connect to field devices.
In duplicated systems,
which is the hot standby
CDU?
Diagnostics,
System
Status
panel
Use the hot standby
CDU for connecting.
Is the sensor in auto-
send or polling mode?
Airport-specific
documentation, or connect
to sensor to find out. With
auto-send sensors, sensor
messages will be displayed
automatically after
establishing the
connection.
If the sensor is in polling
mode, you have to type
and send the polling
string to see sensor
messages.
What is the polling
string of the sensor?
Sensor manual
Enter the polling string
after you have opened
the sensor connection
and the command
mode.
Is the sensor connected
to the CDU directly or
through a data
collector?
Airport-specific
documentation
If the sensor is
connected via a data
collector, you have to
connect to it before you
can get to the sensor.
If there are several data
collectors in the system,
to which data collector is
the sensor connected?
Airport-specific
documentation
Select the appropriate
data collector from the
Devices list.
What do the field device
messages in the
Terminal
panel mean?
Sensor manuals and data
collector manuals
Find out about sensor
status by viewing
sensor messages.
What commands do you
need to send to field
devices?
Sensor manuals and data
collector manuals
Use the appropriate
commands to solve the
sensor problem or to get
information about it.
NOTE
This manual does not cover the field device messages that are displayed
in the
Terminal
panel or the commands you need to send. For
information, see the appropriate field device manuals.