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WEB-645, CP-645 NETWORK CONTROLLER
Replacing the 12V sealed lead-acid backup battery.
1. If applicable, backup the controller's configuration to your PC using platform tools in WEBs-AX Workbench.
2. Stop any running station, using the Application Director platform view.
3. Unplug the 6-position power connector. Do not remove the male connector plug from the wiring harness.
4. Use a 1/4" (6mm) socket, unscrew the lock nut from the battery bracket.
5. Hold the battery in place while you remove the battery bracket.
6. Disconnect the two quick-connect terminals on the battery.
7. The controller will lose its time and date settings if it is disconnected from both battery and AC power for more than one
hour.
8. Remove the old battery and recycle as defined by your regional codes. For recycling within the US, see the labeling on the
battery.
9. Connect the quick-connect terminals to the new battery, ensuring that the:
10. RED (+) wire is connected to the positive battery terminal
11. BLACK (–) wire is connected to the negative battery terminal.
12. Secure the new battery to the bottom of the unit with the bracket and tighten the lock nut.
13. Plug in the power connector in and verify normal operation.
Battery-less option
A unit running WEBs-AX (not WEBs R2) can be software
configured to operate "battery-less", using only the onboard
SRAM of the NPM6E processor module to maintain data in a
power loss or brownout event. Or, the unit can be configured
to use both its sealed lead-acid backup battery and SRAM
backup.
NOTE: Although a WEB-645-AX (running WEBs-AX) can
be configured to run without its provided backup
battery, in most cases it is expected for the bat-
tery to be used. This provides immunity to
"power quality events" including momentary
power outages or brownouts—which otherwise
can result in a controller reboot—even if for only
one or two AC cycles (1/60th or 1/30th of a sec-
ond).
NOTE: For a number of reasons, other models of SRAM-
equipped controllers running WEBs-AX may be
better candidates for a "battery-less" installation.
Typically such controllers use a smaller, more
difficult-to-replace NiMH (nickel metal hydride)
battery pack, and are often mounted in areas
harder to access than a WEB-645-AX controller.
Refer to the documents listed in the "Related
Documentation" on page 1 for configuration
details on SRAM support.
Part Number
50000276-014
Battery, 12 Vdc, 1.2 AH (see "Replacing the 12V battery," page 13.)
H10026
LON (LonWorks) Trunk Connector Plug, 2-position
H10140
RS-485 connector plug, 3-position
10138
Battery/ground harness (also includes 6-position power connector)
H10148
Adapter, RJ-45 to DB-9 null modem, for serial port to connect to DTE device
H10180
Silver satin patch cable, 4 feet (used between adapter and serial port)
H10181
Silver satin patch cable, 10 feet (used between adapter and serial port)
H10182
Silver satin patch cable, 25 feet (used between adapter and serial port)
62-0432—01
Table 5. Standard replacement parts.
Description
Replacement Parts
Servicing the WEB-645-AX controller may call for
replacement parts. There are three categories of parts:
• Non-replaceable Parts
• Standard Replacement PartsStandard Replacement Parts
• Field Replacement Units
Non-replaceable Parts
Other than the parts listed in the replacement parts sections,
there are no serviceable components on the base assembly.
MEMORY
Any addition, modification, or replacement of memory
components requires software configuration and is not a field
upgrade. For additional information, consult your regional
Tridium office.
FUSES
The controller contains a non-user replaceable fuse, soldered
on the circuit board, and is not user-serviceable. If this
circuitry is suspect, contact your regional Tridium office for
technical support. See the "Returning a Defective Unit"
section on page 16.
Standard Replacement Parts
Standard replacement parts are listed in Table 5. and can be
ordered from stock without restriction. Standard replacement
parts cannot be returned for credit and should be disposed of
in an appropriate manner.
14
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