Arbiter Systems 1088A, Operation Manual

Page: 37 / 279

3.8 Connecting Output Signals 17
3.7.1 Replacing Fuses
An IEC-320 power inlet connector includes a 1-A, 250-V fast acting fuse. The fuse is contained in
a small compartment with a snap-fit latch, which also has a compartment for a spare fuse. The
fuse compartment is located directly adjacent to the input connector socket, and can be opened by
pulling both sides directly out away from the chassis, or by gently prying with a small flag-blade
screwdriver. Check Table 3.2 for replacement fuse information.
To replace the fuse, first disconnect the line cord from the power source and then remove the cord
from the rear-panel IEC connector. The in-circuit fuse is the innermost one; inspect it to deterrmine
if it is open. As required, replace with fuse in the outer compartment, and replace the spent fuse.
With an Option 07, 08 or 15A/15B, the input power module includes separate fuse holder adjacent
to the terminal power strip. To check the fuse, first disconnect power to the clock. Grasp the
fuse-holder cover and turn it counter-clockwise. The cover and fuse should pop out. CAUTION:
Replace fuse only with another of the same type and rating. See Table 3.2 above for the correct
fuse configured for your option.
3.8 Connecting Output Signals
Output signals may be connected through designated standard BNC or option connector. For
standard I/O connectors, see Section 2.3.6. Connectors are standard female BNC. For Options
that have terminals for output connectors, see Appendix C for details about those options and
connectors. As an example, the Option 27 uses Phoenix-style terminals with 5-mm spacing and
will accept between 0.25 and 2.5–mm wire diameter. BNC connectors (on installed option boards)
are female and require only connecting the (male) connector into it. For technical details concerning
the various timing signals, see Chapter 7.
3.9 Connecting Input Signals
Input signals may be connected through the designated I/O terminals, J2, J3, J4, and J5. J2 is used
for auxiliary inputs, J3 and J4 are both used for timing events and J5 can be used to connect an
external timing reference, instead of using the internal oscillator. For standard I/O connectors, see
Section 2.3.6. BNC connectors (on installed option boards) are female and require only connecting
the (male) connector into it.
3.9.1 Connecting an Event Input at J3 or J4
An event input may be connected to the Model 1088B series clock through two I/O connectors: J3
(Event B) and J4 (Event A). Refer to the rear-panel drawing in Figure 2.2.