APB DynaSonics
6
© 2006 APB DynaSonics – All Rights Reserved
OPERATION WITH DUAL POWER SUPPLIES
Single PS450 power units are conservatively rated to operate the 56 channel SPECTRA console continuously. For the
assurance of fully redundant automatic back-up operation the console chassis accepts a second PS450 unit. When a
second PS is present and powered then both power supplies operate and the load is shared. Two independently
protected sources of AC power are recommended for maximum protection against loss of power.
1.
Connect each power supply unit to AC power using the cable included.
2.
The power supplies must both be switched on using the panel rocker switch on both units.
3.
Normal operation is accompanied by the green illumination of the indicators on both units. In addition two blue PS
status indicators are located within view on the console light-bar.
4.
If for any reason a supply goes into shut-down then console operation continues using the other unit, the
changeover is automatic and seamless. This event would be signaled by loss of a blue PSU status indicator.
REPLACEMENT OF POWER SUPPLY UNITS
1. Disconnect the AC power cord.
2.
Remove four screws that secure the PS unit in the console chassis marked in the diagram with the arrows:
Pull on the power supply handle and the complete unit will slide out of the console chassis.
3.
Slide the replacement unit into the console. Replace the four fixing screws.
4.
Reconnect the AC power cord.
5.
Switch on the power supply using the rocker switch on the panel.
6.
Normal operation is signaled by green illumination of the power supply panel indicator(s) and illumination of blue
“PSU GOOD” indicators on the upper console control surface.
7.
Note that the power supply units will not operate outside of the console. Automatic circuits prevent operation if the
unit is switched on while out of the console.
SERVICING
CAUTION RISK OF ELECTRIC SHOCK. DO NOT OPEN THE POWER SUPPLY.
There are no user serviceable parts inside the PS unit enclosure. Units contain hazardous AC and DC voltages.
Return defective units to APB-DynaSonics or authorized agent for servicing.
T h e un i t wi l l n o t op e r a t e ou t s i d e a co n s o l e. Au t o ma t i c ci r c u i t s pr ev e n t op e r a t i o n wh en di s c o n n ec t ed fr o m th e
c o n s o l e. If th i s oc c u r s sw i t c h of f , rep l a c e t h e un i t in t h e co n s o l e a n d wa i t 30 s ec o n d s bef o r e sw i t c h i n g on .
