Rockwell Automation 2706-M1 MESSAGEVIEW 421 HARDWARE MANUAL - Manual (Page 114)

7–6 Troubleshooting and Maintenance
Publication 2706–816
A MessageView Terminal is protected by an internal fuse. Two
conditions that can cause a fuse to blow are:
•
overcurrent/overvoltage
•
internal component failure
To determine the cause of the blown fuse:
1. Immediately disconnect the power from the terminal at the power
source.
2. Verify that correct voltage source (24V DC) is connected to the
MessageView terminal.
If incorrect voltage source was applied to terminal, correct the
voltage source.
3. Contact Allen-Bradley Field Service Center for fuse replacement.
!
ATTENTION: Allen-Bradley Field Service Center
Representatives: Replace defective fuse with a Series
239 Slo-Blo 2.0 Amp fuse or Type GMC Time-Lag 2.0
Amp fuse.
!
ATTENTION: Remove the MessageView terminal
from a hazardous environment before replacing the
fuse.
Replacing the Internal
Fuse