Coastcom D/I Mux III System, User Manual, Page: 67 / 329

Chapter 3. Installation
47
-48 VDC Power Systems
The D/I Mux III requires currents ranging from 1.25 Amps to 4 Amps at -48 V DC. To
compensate for surge conditions, a slow-blow fuse should be used between the D/I Mux III and -
48 V DC power source. A 6 Amp fuse will cover worst-case requirements for overload protection
of a -48 V DC powered system.
-48 V DC Power Supply Capacity
Coastcom’s -48 V DC Power Supply (P/N 30338-902), either by itself or with a second
30338-902, can power all combinations of line cards up to the maximum D/I Mux III shelf
capacity of 24. (See Tables 3-12, 3-13, and 3-14 for more details on power supply
capacity.)
-24 V DC Power Systems
The D/I Mux III requires currents ranging from 2.5 Amps to 8 Amps at -24 V DC. To compensate
for surge conditions, a slow-blow fuse should be used between the D/I Mux III and -24 V DC
power source. A 10 Amp fuse will cover worst-case requirements for overload protection of a -24
V DC powered system.
All -24 V DC systems configured with single or redundant -24 V DC supplies require modified
common control equipment. See
Appendix B. 24 V Compatibility , regarding which common
equipment and line cards operate from -24 V DC power.
-24 VDC Power Supply Capacity
Coastcom’s Applications Engineering group is available to assist in determining power
requirements for systems requiring more than 12 data circuits with -24 V DC power
systems.
110 VAC Power Systems
Standard 110 V AC power with a 15-Amp circuit breaker or fuse is adequate for up to five
systems.
110 VAC Power Supply Capacity
The Coastcom Applications Engineering group is available to assist in determining power
requirements for systems requiring more than 12 data circuits with 110 V AC power
systems.
Required Equipment for D/I Mux III Installation
Before installing the D/I Mux III, make sure that the following equipment is on hand. See Appendix E.
Wiring and Cable Tables for specific cable part numbers.
•
T1 cables with DB-15 male connectors, or RJ-48 connectors (available from Coastcom)
•
16-gauge wire to connect the D/I Mux III to the -48 V DC or -24 V DC power source
•
Adapter cables for the DB-9 male connector, if Sync I/O (clock synchronization) is required