Vodavi Triad 1/2/3 Installation Manual

3-18 Pow er Suppl y Unit Inst al l atio n
Figure 3- 8: DCCU a nd Optional BCU Ins ta llation 

Powe r Supply Unit I nst alla tion 3 -19
Refer toFigure 3- 1for a list of all card types.
Table 3-1: Power Cons umption pe r Card
Card Power Required
10A Po wer Su ppl y pro vi des 240 watt s
15A Po wer Su ppl y pro vi des 360 watt s
Digit al Tel ephone Inter fac e Bd (DTIB) 38 w at ts*
Digit al Tel ephone Inter fac e Exp. B oard (DTI BE 38 w at ts*
El ect ronic Telephone Inter face Br d (ETIB ) 42 w at ts*
Si ngle Line Inter face B oard (SLI B) 14 w at ts*
Loop Start CO Trunk Board (LCOB) 7 watts
G r o...

3-20 Pow er Suppl y Unit Inst al l atio n
F igure 3-9: Ty pical Sy stem Configurations 

Powe r Supply Unit I nst alla tion 3 -21
Figure 3-10: Typical System Configurations 

3-22 Pow er Suppl y Unit Inst al l atio n
Figure 3-11: Typical System Configurations 

Powe r Supply Unit I nst alla tion 3 -23
Figure 3-12: Typical System Configurations 

3-24 Pow er Suppl y Unit Inst al l atio n
Battery Back-up Wiring Installation
As i n di c ate d i nFi gur e 3- 2,theTr iad 3Sys te m can be eq uipp ed to pr ovid e
operation from external batteries if local AC power fails. The Back-Up
batteries are connected to the terminal block of the BKSU/EKSU1
cabinets.
The external batteries must provide 24 volts DC. This is generally
accomplis hed by connectin g two 12 volt batteries in a series
ar ra ngeme nt . O pe rat i on on bat te r ie s i s con tr oll ed by...

Powe r Supply Unit I nst alla tion 3 -25
Figure 3-13: Battery Back-Up Installation 

3-26 Pow er Suppl y Unit Inst al l atio n
Power Line Surge Protection
The AC outlet should be equipped with an additional power line
trans ient surge protection d evice. Sy stems using s uch devices are more
re si st ant t o da mage fr om p ower l ine s urge s tha n unpr ot ect ed sys te ms.
Power line surges often occur during switching operations and especially
during viole nt thu nderstorm activ ity.
Ins ta llation of a surge protector meeting the sp ecifica tions des cribed in
the f oll ow pa ra gra...

PCB I nst alla tion 3 -27
PCB Installation
PCB Handling & General Installation
The sy st em PC B s con tai n d igi t al c ir c uit r y whi c h, whil e ext r eme ly re li ab le ,
can b e d amag ed by expos ure to excess iv e s ta tic electricity. W hen
handling PCBs, a grounded wrist strap should be used to protect the
boards from static discharge s. Also, use common se nse whe n hand ling
PCBs.
For example, do not place a PCB in locations where hea vy ob jects might
fall on the PCB a nd da mage compon...