Varec Driver Entry Terminal 8620 - Manual (Page 30)

Maintenance and Troubleshooting
22 Installation and Operations Manual
5.2.2 Replacing the main circuit fuse
! Warning Explosion Hazard. To prevent an electrical shock or ignition of a flammable atmosphere,
do not remove or replace the main circuit board fuse while the circuit is live.
1. Turn off the main circuit breaker switch to remove power from the unit.
2. Open the front panel of the 8620 DET.
3. Open the fuse holder to release the fuse.
4. Remove the fuse on the main circuit board from the fuse holder. To locate the fuse holder,
refer to Figures 3-1 and 3-2 on pages10 and 11.
5. Replace it with a new fuse (part # P116-01-044).
6. Close the front panel of the 8620 DET.
7. Turn on the main circuit breaker to connect power to the unit.
Table 5-3 lists the type of fuse and the fuse value.
5.2.3 Replacing the I/O Module fuse on the OPTO 22 board
! Warning Explosion Hazard. To prevent an electrical shock or ignition of a flammable atmosphere,
do not remove or replace the I/O Module fuse on the OPTO 22 board while the circuit
is live.
If the digital I/O has a module with a fuse, do the following to replace the fuse:
1. Turn off the main circuit breaker switch to remove power from the unit.
2. Open the front panel of the 8620 DET.
3. Open the fuse holder to release the fuse.
4. Remove the fuse on the I/O Module from the fuse holder. To locate the fuse holder on the
I/O Module, refer to Figures 3-1 and 3-2 on pages10 and 11.
5. Replace it with a new fuse (part # 37411000410).
6. Close the front panel of the 8620 DET.
7. Turn on the main circuit breaker to connect power to the unit.
Table 5-3 lists the type of fuse and the fuse value.
Fuse Fuse Value Part # Description
Main Fuse 1 Amp 600 VAC, 300 VDC P116-01-044 Cooper Busman Fuse
I/O Module Fuse 1 Amp 250V 37411000410 Wickman 374 Series TRS5®
Subminiature Fuse
Table 5-3: Fuse, Fuse Value, Part #, and Description