Part Number 12762 Rev 1.1 | April 30, 2014 MAINTAINING THE CONTROLLER
Status
26 NETWORK CONTROLLER 3E & 6E MOUNTING AND WIRING GUIDE |
Status
The green “STATUS” LED is next to the heartbeat LED, and is visible on the cover.
This LED provide a CPU machine status check, and should remain lit whenever the
controller is powered. If the status LED does not light while power is applied, contact
System Engineering for technical support.
Serial Ports
LEDs for the two serial ports are located on the controller’s bottom board, on the
opposite side of the RS-232 and RS-485 ports. Labels “COM1” and “COM2”
correspond to the software configuration of the COM ports. LEDs show the transmit
and receive activity for the serial ports and optional modem.
Note You must remove the cover to see these LEDs. See “Removing and
Replacing the Cover,” page 10.
•The yellow transmit LED indicates that the controller is sending data out the
serial port over a communications line to a connected device.
•The green receive LED indicates that the controller is receiving data from a con-
nected device.
Serial port LEDs provide a fixed on-time when data is detected on the port. If the
receive LED is on constantly, this indicates a problem with the communications
channel, such as a shorted wire or reversed wiring.
Maintaining the Controller
This section provides information on the following topics:
• Cleaning
• NiMH Battery Installation and Maintenance (optional)
• Replacement Parts
• Replacing the Controller Base Assembly
• Returning a Defective Unit
Cleaning
If dust or metal filings are present inside the unit, clean with vacuum or compressed
air. Otherwise, no cleaning inside the unit is required. Optionally, if the cover
becomes dirty, you can wipe it with a damp cloth and mild detergent.
NiMH Battery Installation and Maintenance
• Installing or replacing the optional NiMH battery
• Battery maintenance
• Battery disposal
Installing or replacing the optional NiMH battery
The optional NiMH battery pack is sold as an assembly, that is a custom battery pack
with an attached cable and connector plug, mounted on a bracket. To install (or
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