This section describes the replacement of the Power Mate external I/O
card D, E fuses. The table below lists the names and drawing numbers
of the I/O cards D, E.
2.7.8 (a) I/O card drawing numbers
Number of I/O points Drawing number
External I/O card D DI: 48 points, DO: 32 points A16B–2202–0733
External I/O card E DI: 96 points, DO: 64 points A16B–2202–0732
The I/O card contains a +24 V power input fuse, FU1, and +5 V power
output fuse, FU2. If +5 V is not output, fuse FU1 or FU2 may have blown.
In such a case, remove the fuses from their sockets, then check their
continuity using a multimeter (or visually check whether they have
blown). If a fuse has blown, investigate the cause, take appropriate action,
then replace the fuse. The capacity, part number, and location of the fuses
are as follows:
2.7.8 (b) Capacity and part number of I/O card fuses
Capacity Ordering specification
FU1 3.2A A60L–0001–0175#3.2A
This section applies to the FSSB I/O module (basic unit).
There is no fuse on the expansion unit.
Table 2.7.9 (a) FSSB I/O module drawing number
FSSB I/O module (basic unit) A02B–0236–C211
The FSSB I/O module contains a 24 VDC power input fuse, FUSE1. If
the LED1 does not light, the fuse may have blown. In such a case, remove
the fuse from its socket, and check its continuity by using a multimeter.
When the fuse has blown, investigate the cause, take appropriate action,
then replace the fuse.
The External I/O Card
D, E Fuses
FSSB I/O Module