NetSure
™
Control Unit (NCU)
User Manual, UM1M830BNA
Spec. No: 1M830BNA, 1M830DNA Code: UM1M830BNA
Model No: M830B, M830D Revision M, May 12, 2017
Replacement Procedures
NCU Replacement
DANGER! Follow all “Important Safety Instructions”
found in the documentation provided with the system
the NCU Controller is installed in.
ALERT! NCU CONTROLLER HANDLING.
Installation or removal of the NCU Controller requires
careful handling. To avoid possibility of NCU Controller
damage from static discharge, a static wrist strap
grounded through a one megohm resistor should always
be worn when handling the NCU Controller. ESD-protective
packaging material must also be used when
carrying/shipping the NCU Controller.
NOTE: Depending on your network security settings, when you
remove a device that is connected to your network and assign
the same IP address to the replacement device, you may not be
allowed to communicate with the replacement device over the
network. Contact your network administrator for assistance.
The NCU is hot swappable. It can be removed and installed with
the system operating and without affecting the output bus.
Procedure
1. Before performing this procedure, ensure the
replacement NCU contains the same configuration file as
the existing NCU. Refer to the Configuration File Part
Number Label on the side of the replacement NCU for the
Configuration Part Number (see Figure 112). If the
existing controller is operational, navigate the menus to
view its configuration file (MAIN SCREEN / ESC).
Figure 112. NCU Configuration Label Location
2. Performing this procedure may activate external alarms.
Do one of the following. If possible, disable these alarms.
If these alarms cannot be easily disabled, notify the
appropriate personnel to disregard any future alarms
associated with this system while this procedure is being
performed.
3. Connect an approved grounding strap to your wrist.
Attach the other end to a suitable ground.
4. Loosen the captive fastener securing the latch
mechanism to the front of the NCU to be replaced. Pull
the latch mechanism away from the NCU (this will retract
the latch mechanism located on the bottom of the NCU).
This unlocks the NCU from the shelf. Refer to Figure 113.
5. Slide the NCU Controller completely from the shelf.
6. Loosen the captive fastener securing the latch
mechanism to the front of the replacement NCU. Pull the
latch mechanism away from the NCU (this will retract the
latch mechanism located on the bottom of the NCU).
7. Slide the NCU completely into its mounting position.
8. Push the latch mechanism into the front panel of the
NCU, and secure by tightening the captive fastener. This
locks the NCU securely to the shelf.
9. Wait for the controller to finish booting and verify that
the complete system operates normally.
10. Enable the external alarms, or notify appropriate
personnel that this procedure is finished.
11. Ensure that there are no local or remote alarms active on
the system.
Figure 113. Latch Mechanism on the NCU
M830B
M830D
Configuration File
Part Number Label
Configuration File
Part Number Label
Captive
Fastener
Latch
Mechanism
M830B
Captive
Fastener
Latch
Mechanism
M830D
ESC ENT
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