Power supplies – Grass Valley Trinix NXT v.3.3.1 User Manual
Page 55
Trinix NXT — Installation and Service Manual
55
Trinix Frames
Power Supplies
The symmetrical Trinix routing family uses an internal power supply. The
128 and 256 frames can use two power supplies. The optional (and recom-
mended) second power supply provides redundancy and increased reli-
ability due to load sharing; both supplies work less, creating less strain and
decreasing the likelihood of failure of either unit.
All power supplies are front loading, can be hot-swapped, and has its own
fan for cooling. The supply uses automatic line sensing technology to adapt
the supply to all major power standards throughout the world.
Note
Grass Valley strongly recommends, whenever possible, using the AC high
line to reduce line currents and heat within the power supplies.
In AC power applications, the 512x512 frames are equipped with two
power supplies mounted in a separate frame. Space for two additional sup-
plies for redundancy is provided. Redundant power supplies are highly
recommended for On-Air or Business-critical routers. The 512x512 router’s
power supply frame may be mounted above or below the router’s main
frame, depending on video cable routing requirements (or weight distribu-
tion requirements).
The back panel of the frame provides a separate AC connector for each
power supply. Each power supply has its own separate IEC AC power
cord. Each power cord should be plugged into a separate dedicated (20A
AC low line, 10A AC high line) power circuit. This action prevents the
router from having one failed supply being able to trip the breaker on a
heavily loaded circuit, and then temporarily shutting off other functioning
power supplies or equipment. The back panel of the frame also provides an
optional 48VDC input connector. The 48VDC input connector is an option
for additional power redundancy. DC power can be supplied by an
external “Tertiary” supply (a Trinix option), or by a customer provided
48VDC power source. (See
section for the Trinix power
requirements.)
CAUTION External 48 VDC Inputs are not fused. Customers must ensure that the 48
VDC power sources, which they must provide, are properly fused.
Each power supplies deliver 48 volts to all components and the individual
components convert down the voltages for their particular need.
It is possible to operate the router with a combination of internal power
supplies and an external DC power source for additional redundancy.
Asymmetrical Router
Note
For information about optional Power Supply configurations for the Asym-
metrical routers, see Trinix Asymmetrical Power Supply Configurations