Part Number 12762 Rev 1.1 | April 30, 2014 REPLACEMENT PARTS
Replacing the Controller Base Assembly
30 NETWORK CONTROLLER 3E & 6E MOUNTING AND WIRING GUIDE |
To replace a controller with a new replacement unit, proceed as follows:
Procedure 9 Replacing a T-300E or T-600E controller.
Step 1 If possible, use the appropriate NiagaraAX software tool to back up the con-
troller’s configuration to your PC.
Step 2 Remove power to the controller. The unit should power down automati-
cally. Wait for all LEDs to remain off.
Note If IO accessory modules are installed, and any I/O points have voltage, turn
the devices off or disconnect power to them.
Step 3 Note positions of all communications and other wiring cables going to the
controller, as well as installed accessory modules (if they must be removed).
If necessary, label connectors and accessory modules to avoid mis-connec-
tion later, after the controller is replaced.
Step 4 Unplug all Ethernet, serial, LON, modem, and I/O connectors from the con-
troller.
Step 5 If IO accessory modules are installed:
— If DIN rail mounting with DIN end-clips was used, you may be able to remove
the DIN rail end clip that secures the JACE-6 end of the assembly, and then
slide the controller away from the rest of the assembly. Then you can remove
the controller from the DIN rail (see Figure 1 on page 9), leaving the mounting
and wiring of IO modules untouched.
In this case, after removing the controller from the DIN rail, go to Step 6.
— If tab (screw) mounting was used instead of DIN rail mounting, or if a combi-
nation of DIN mounting and tab screws was used (into the controller’s “acces-
sory side” tab holes, see last page), you will need to remove accessory modules
first, before removing the controller. In this case:
a Making a careful note of all wiring terminations, unplug the I/O connec-
tor plugs and earth ground wires from the installed IO modules.
b Remove the installed accessory modules, starting with the end module.
c Remove any screws fastening the controller, and remove it (see Figure 1).
Step 6 Remove the cover of the old unit. See “Removing and Replacing the Cover,”
page 10. Note the position of installed option cards, if any. You must trans-
fer them to the replacement controller.
Step 7 Remove any option cards from the old controller and install them into the
replacement controller, if applicable. See “Installing an Option Card,” page
12 for more details.
Step 8 Check the RS-485 biasing jumpers on the existing unit, and duplicate on the
replacement unit (see Procedure 4 on page 21).
Step 9 Mount the replacement controller as it was previously, using the same DIN
rail location and/or screws.
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