Disk Drive; Fuses - ABB IRB 6400R Product On-Line Manual

1.11 Disk Drive

The disk drive is controlled by the I/O computer via a flat cable. The power is supplied by
a separate cable.
Common types of error are read and write errors, generally caused by faulty diskettes. In
the event of a read and/or write error, format a new, high quality diskette in the robot and
check to see whether the error disappears. If the error is still present, the disk drive will
probably have to be replaced. However, check the flat cable first.
NB: Never use diskettes without a manufacturer's mark. Unmarked, cheap diskettes can be
of very poor quality.
If the disk drive is completely dead, check the supply voltage connection to the disk drive
to see that it is +5 V, before replacing the drive.
Measuring points are available on the backplane: X9 Maintenance plug, see chapter 9.
When replacing the disk drive, check that the strapping is set correctly on the unit. Compare
with the faulty drive being replaced.

1.12 Fuses

There is one automatic three-phase 20 A fuse that supplies the DC-link in the MOTORS
ON state, on the transformer. There is also a automatic three-phase 10 A fuse that supplies
the power supply unit. There are also two fuses for customer AC supplies, one 3.15 A and
one 6.3 A.
The backplane has four PTC resistance fuses:
- Serial measurement board 1
- Serial measurement board 2
- CAN2, manipulator I/O
- CAN3, external I/O
The fuses protect against 24 V short-circuits and return to the normal state when there is no
longer a risk of short-circuiting.
The panel unit has one PTC fuse to protect the motor on chains. An open fuse is indicated
on the teach pendant, see Status of the Panel unit, inputs and outputs, displayed on the teach
pendant side 6, 24 panel.
The cabling from customer 24 V supply is protected by a 2A fuse on terminal XT31 in the
upper compartment of the controller.
Note that the power supply unit DSQC 374 is provided with a short circuit energy limitation
which makes the fuse unnecessary.
Product Manual
Fault tracing guide
11