Vodavi Triad 1/2/3 Installation Manual

3-8 K SU & Po we r Suppl y ( PSU) Inst al l atio n
Fi g u r e 3- 2: B KSU M o un t i ng H o l es
Mounting the Expansion Cabinet (EKSU1)
If required, an Expansion KSU1 (left top cabinet) is mounted directly on
the top of the Basic KSU .
Before mounting the Expansion KSU on the screws:
1. Remove the KSU Interconnect Ca ble Cove r Plate on the top at the re ar
ri ght o f the B a sic K SU.
2. Remove the two screws holding each plate and lift the plate from the
BKSU. Refer toFi gur e 3- 2.
The E KSU1 i s moun...

KS U & Power Supp ly (PSU) In sta llat ion 3-9
5. Remove the front cov er by turning the two front cove r screws½tu r n
counter clockwise.
6 . Ti lt a nd l if t the c ove r to r em ove.
The KSUs require intercommunications which are provided by the KSU
Data Cable shippedwitheachEKSU.
1. Conne ct the ca ble to the back pla ne of b oth KSUs by a 25- pair
connector.
2. InstallthecablethroughtheBasic KSUwheretheCableCoverPlate
wa s r em oved int o t he Exp ansi on KS U.
3. Ins ert th e 25- pair conn ector a...

3-10 K SU & Po we r Suppl y ( PSU) Inst al l atio n
Fi gure 3 -3: Expa nsi on Cabi net (EK SU2) Ins ta ll at i on 

Ring Gene ra tor Ins tallat ion (RG U) 3 -11
Rin g Gene rator Installatio n (RGU)
This unit is needed in the BKSU, whenever SLT devices are installed on
the s yst em. T his uni t supp li es th e r i ng vol t age and me ssag e w ait v olt age
fortheoperationofSLTsonthesystem.
The sy stem pro vid es the ca pability to ha ve an op tional ring ge nerator
(RGU) for signaling 2500 type telephones and providing message waiting
on 2500 type telephones.
Figure 3-4: Ring Ge nerator Installation 

3-12 KS U Gro unding
KSU Grounding
To e nsur e pr oper sy st em op er at ion and f or s afe ty pur pose s, a good e ar th
gro und i s r e quir ed .
A metallic COLD water pipe usually provides a reliable ground path.
Care fully che ck that the pip e d oes not conta in ins ula te d join ts th at could
is ola te th e ground p ath . In the ab sence of the COLD wate r p ipe , a ground
rod or ot her sour ce may be use d.
A #1 4 In sul ate d AW G o r la rg er c o ppe r wir e sho ul d be use d be tw ee n t he...

KS U Gr o u nd i ng 3 - 13
Figure 3-5: KSU Grounding
(#14 InsulatedWire)
GND Groun d L ug
BK SU Fr ont Vie w 

3-14 Pow er Suppl y Unit Inst al l atio n
Po we r S u pp l y Un it In s t a l la t i o n
AC/D C (P S- 10A o r PS -15 A)
There are two power supply units, one with a 10A (output) rating, the
oth er with a 15A (outp ut) ra ting. The pow er sup ply conne cts to th e
DC/D C C onve rter Unit (DC CU) locate d in the BKSU ca binet.
The BKSU /E KSU1 cab ine ts ar e powe re d wi t h a se par at e p ower s uppl ie s.
The se powe r supp li es sho uld be abl e to supp ort i ts as soci at ed ca bi net i n
a heavily...

Powe r Supply Unit I nst alla tion 3 -15
Fi g u re 3- 6: AC / DC P o w er I ns ta ll at i o n 

3-16 Pow er Suppl y Unit Inst al l atio n
DC /D C (wi t h B CU & 48 V U)
The BKSU/EKSU1 cabinets have a separate DC/DC Power supply. This
powe r suppl y shoul d be a ble t o s uppor t it s ass ociat e d cab ine ts i n a
hea vily load ed configura tion of station ins truments . T he power supp ly
connects from the AC /D C located in the BKS U.
-4 8V Sup ply Uni t (48 VU) - T he DC /D C ha ve an opti onal - 48 V s uppl y un it
(48VU) to the system to support certain trunks and SLT station. The
system can...

Powe r Supply Unit I nst alla tion 3 -17
Figure 3-7: Optional Battery Charging Unit (BCU)