Removing the Controller cover
Important:
Electrostatic discharge can damage
controller components. Use proper electrostatic
discharge precautions during installation, setup, and
servicing to avoid damaging the controller.
Important:
Disconnect all power sources to the
controller before removing cover and changing
the position of any jumper or the EOL switch on
the controller. Failure to disconnect power before
changing a jumper or EOL switch position can result
in damage to the controller and void any warranties.
The controller cover is held in place by four plastic
latches that extend from the base and snap into
slots on the inside of the housing cover.
To remove the controller cover:
1.
Place your fingertips under the two cover lift tabs on
the sides of the housing cover and gently pry the top
of the cover away from the base to release the cover
from the two upper latches.
2.
Pivot the top of the cover further to release it from
the lower two latches.
3.
Replace the cover by placing it squarely over the
base, and then gently and evenly push the cover
on to the latches until they snap into the latched
position.
Figure 10: FAC26 with cover removed showing EOL
switch and jumper positions
Setting the End-of-Line (EOL) switch
Each field controller has an EOL switch, which, when set
to ON, sets the controller as a terminating device on the
bus. See
location. The default EOL switch position is Off.
Figure 11: End-of-Line switch positions
To set the EOL switch on a field controller:
1.
Determine the physical location of the field controller
on the FC bus.
2.
Determine if the controller must be set as a
terminating device on the bus.
Note:
Refer to the
MS/TP Communications Bus
Technical Bulletin (LIT-12011034)
for detailed
information regarding EOL termination rules and
EOL switch settings on FC buses.
3.
If the controller is a terminating device on the FC
bus, set the EOL switch to ON. If the controller is not
a terminating device on the bus, set the EOL switch
to Off.
When a controller is connected to power with its EOL
switch set to ON, the amber EOL LED on the controller
cover is lit.
Setting the Input Jumpers
CAUTION
Risk of Electric Shock:
Disconnect supply power to the field controller before
attempting to adjust the Binary Output Source Power
Selection Jumpers. Failure to disconnect the supply
power may result in electric shock.
ATTENTION
Risque de décharge électrique
Débrancher l'alimentation de l'controller avant tout
réglage du Binary Output Source Power Selection
Jumpers. Le non-respect de cette précaution risque
de provoquer une décharge électrique.
FAC2611 Advanced Application Field Equipment Controller Installation Guide
18