N O I TAPPLICATION
C U R T S N I YLNOTE
BMESS
Guidelines For Extending Power Supplies
rotcennoC elbaC RLX | XXM*CN & XXF*C
Application Description: In a typical integrated
.elbacoperating
eht otno toob eht edilS A
room surgical displays are suspended from the ceiling using
N O I T C U R T S N I YL B M E S S
rotcennoC elbaC RLX | XXM*CN & XXF*C
redlos dna slanimret eht otni seriw tresnI
nwneeded
ohs sa elbac eraperP B
surgical boom arms so they can be easily positioned .as
around the surgical table.
C
It is not possible to safely route a high voltage AC power
Figure 1
.meht
line through most surgical boom systems. For this reason,
81
4 supply
the low
.elbavoltage
c eht otnDC
o kcoutput
uhc tuPofDthe display’s power
.yek gnidiug eht ot noitnetta yaP :noitnettA
is.eltypically
bac eht oextended
tno toob ehand
t edilrouted
S A
through the boom arm
and the power supply is installed either in the ceiling or
Surgical
Boom Arm
eht otni rehtegot kcuhc dna tresni edilS E
nwohs sa elbac eraperP B
in a .equipment
rack.gnnearby
isuoh (see
DC Power
Extension
Cable
Maximum DC
Cable Length
order to ensure both electrical safety compliance* and
redlos dna slanimret eht otni seriw tresnI C
gnihsub eht gninrut yb noitallatsni eht hsiniF F
proper operation of the
.medisplay
ht
.rotcennoc eht otno
Power
Supply
figure 1 to the left). In
it is important to follow
81 DC
certain guidelines when extending the power supply’s
4
.elbcable.
ac eht o
tno application
kcuhc tuP Dnote is intended to provide
output
This
.yek gnidiug eht ot noitnetta yaP :noitnettA
guidelines that may be referred to when fabricating
NDS Surgical Display
eht otni rehtegaot DC
kcuhextension
c dna trescable
ni edifor
lS Ean
.gnisuoh
NDS surgical display.
E Lextension
B A C cable
R O T
D N display
O C - Ishould
T L U have
M
.4
Basic 3Construction
of DC Extension Cable: ASDC
forCanU NDS
F
gnihsub ehItt gshould
ninrut ybe
b nconstructed
oitallatsni ehtusing
hsiniFconnectors
certain basic construction characteristics.
type
dofethe
dlesame
ihsnU
.rotcennoc eht otno
ita
tDnReO
mBoth
urtsnthe
I dnapositive
lortnoCDC
,oid
uA
YLBMs
EeSlb
SaACused
Fn
OoR
E
and rating as the display and power supply it is intended
to
be
with.
power
m
u
n
e
l
P
n
o
N
E L B A C
R O T C U D N O C - I T L U M
3.4
lines and
the return lines should have equivalentSresistance.
Permitted
that
the
display’s
earth
ground
XXF CN
tekcagreater
J
noitathan
lusnI
natS
electrical
0.1dradohms
(typically
grounding
the display’s
dedearth
leihsground
nU
DO lpath
animoN is sno
shtgneL dradnatSachieved by
/CEN LU
.oN
senkcihT
ssenkcihT
thgieW tinU
roloC
n
o
i
t
p
i
r
c
s
e
D
f
o
C
E
C
)
L
U
(
C
.
o
N
t
r
a
P
sdoeClbpositive
a.dCnoCnoiteapytDC
nempower
urtsnI d
na lthe
ortnoreturn
C ,oidu
A
T
post), then
DC
of .tFonly ethe
and
lines.
mm
hthe
cnI
m
m extension
hcnI
mm
hccable
nI
gk can
.sbL consist
m
m
u
n
e
l
P
n
o
N
gnisuoh
tresni
kcuhc
gnihsub
delbaC srotcudnoC • srotcudnoC reppoC eraB diloS GWA 22
7D2O.4lanim
86o1N.
Male Connector
65t.ekca2J20.
ssenkcihT
6n4o.italu8sn1I0.
ssenkcihT
mm
hcnI
mm
hcnI
mm
hcnI
25.4
871.
65.
220.
64.
810.
72.4
861.
65.
220.
64.
810.
80.5
002.Female
46. Connector
520. 64.
810.
25.4
871.
64.
810.
19.3 NDS
451Surgical
.
46. Imaging
520. 64.
© Copyright 2011,
810.
810.
80.5
002.
65.
46.
220.
520.
64.
tekConstruction
caJ CVP yarG esoR • noitalusnI enelyhteyloP
Example of Extension Cable
5.4dradna0t.S01
6t.h8gieW 0ti.n9U1
8.g7k
0.s.7b1L
X/CX
:CEM
ENLUCN
5978
2902 elytS MWA LU
N
noitpircseD)C°06 V003(
CECM)LCU(C .oN traP
:eCpEyCT
+24V DC
MC
- Return
YLBMESSA FO REDRO
delbaC srotcudnoC • srotcudnoC reppoC eraB diloS GWA 22
Male
Connector
0.01 0.22 8.403-U 0001-U
,neerG
3
:CEN
4978
3902 elytS MWA LU
yarG esoR • noitalusnI enely)Ch°t0e6yVl0o0P3(
6.9
0.12 8.403
0001
,deR tekcaJ CVPMC
w
o
l
l
e
Y
XX
CN
5.4
0.01 4.251-U 005-U
,deR
2
:CFEN
5978
2902 elytS MWA LU
6.8
0.91 8.403-U 0001-U
neerG
MC
)C°06 V003(
8.7
0.71 8.403
0001
:CEC
+24V DC
4.6
0.41 4.251-U 005-U
,neerG
4
:CMECN
4979
4902 elytS MWA LU
- Return
8.11 0.62 8.403-U 0001-U
,deR
MC ,PM
)C°06 V003(
Female
Connector
,,w
04..0111 00..2522 88..440033-U 00000011-U
neoellreGY
3
:CEN
4978
3902 elytS MWA LU
kk
g n iM
hs
6.9g n i s u0o.1h2 8.403 t r e s n0i001
,dcceauRlhBc
Cu b
)C°06 V003(
39 35 232 / 324+ :F
42 42 732 / 324+ :T
038 082 / 1318 94+ :F 098 082 / 1318 94+ :T wo
TlAle/YLN / ED HbmG sbeirtreV KIRTUEN
4.2s5ht1g-nUeL dr0a0d5na-U
tS
8.403-U 0001-U
8.40m3
000.1tF
1150 1314 / 1 33+ :F 0576 1314 / 1 33+ :T
,deR
nreoelorCG
edoC
269.774 36603.6/ 13 18+8.:4F033-3U74 30660301/ -3U18+ :T,neerG
06 7080652-/U258+ :T,n,d
42.5606 7806.24/1258+4.:2F51-5U5Page
1 of 3 ,weoeellRreGY
8.11 0.62 8.403-U 0001-U
,deR
4.11 0.52 8.403
0001
,wkocallleBY
kcalB
.o2N
fo
.dnoC
ecnarF KIRTUEN
RF
AT
24U*Must
2E1N
.:dCM
tE
LN
oyC
ko
PJ4
XX
NT KIR
M
C
KH4 .dtL g:n
o
K
CEN gnoH KIRT
49U7E9N
1105 637 / 44 14+ :F
0105 637 / 44 14+ :T
M
8069with
140990/22NFPA
3e7ly1t+S:99
FW
8A84L9U109 / 237 1+ :T
comply
standard
040L131U(8 / 3891 44+ :T
934 1184/9308291e4ly)4tC
+S°:0M
F6W
1V4A
CM
M:CCE,P
)C°06 V003(
.DEVRESER STHGM
IR LC
LA . KIRTUEN8002© .eciton roirp tuohtiw egnahc ot tcejbus ataD I 8002.30..21
:etadpU
®
APPLICATION NOTE
Guidelines For Extending Power Supplies
Calculating Maximum Extension Cable Length: The maximum length of an extension cable depends
upon both the minimum input voltage of the display and the electrical current capacity of the power
supply. The cable cannot be so long that the voltage drops below the display’s minimum operating
voltage. The cable must also not dissipate power to the point where the power supply’s electrical
current capacity is exceeded. The maximum allowable length needs to be calculated for each of these
two requirements. The shorter length should not be exceeded to ensure both requirements are met.
Operating Voltage: The following equation can be used to calculate the maximum extension cable
length, Lmax , that will still provide adequate operating voltage to the display while under load:
(Vps – Vdisplay min) = (Pdisplay / Vdisplay min) x (2 x Lmax x rcable)
By solving for Lmax this becomes:
Lmax =
Where:
(Vps – Vdisplay min) Vdisplay min
2 x Pdisplay x rcable
Lmax (ft) = Maximum Cable Length
Vdisplay min (Volts) = Minimum Operating Voltage of Display
rcable (Ω/ft) = Cable Resistance Per Foot
Pps (Watts) = Power Supply Capacity
Vps (Volts) = Power Supply Output Voltage
Pdisplay (Watts) = Display Power Consumption
For the NDS display being installed, determine the values for Vps , Vdisplay min , and Pdisplay using the information
contained in the table provided on the following page. Determine the value of rcable based upon the type
of wire being used. Plug in all values into the equation above to calculate the maximum length based on
the voltage requirement.
Power Dissipation: The following equation can be used to calculate the maximum extension cable length
Lmax that will ensure that the amount of power dissipated through the extension cable will not exceed the
current capacity of the power supply:
Pps = Pdisplay + (2 x rcable x Lmax x Pps)
Vps
Vps [Vps–
By solving for Lmax this becomes:
Lmax =
(
)
Vps x Pdisplay
]
Pps
2 x rcable x Pps
For the NDS display being installed, determine the values for Vps , Pps , and Pdisplay using the information
contained in the table provided on the following page. Determine the value of rcable based upon the type
of wire being used. Plug in all values into the equation above to calculate the maximum allowable cable
length that will result in power dissipation that does not exceed the current capacity of the power supply.
© Copyright 2011, NDS Surgical Imaging
Page 2 of 3
APPLICATION NOTE
Guidelines For Extending Power Supplies
Reference Table : The table provided below specifies the minimum operating voltage, maximum power
consumption, and power supply capacity for various NDS displays. Also provided are example maximum
extension cable lengths that will meet the requirements of each display when constructed using the
standard wire types specified in the table. This table is provided for reference only.
Display Type & Size
Standard Display
Part Numbers
Minimum
Max. Power
Operating
Consumption
Voltage
Power
Supply
Capacity
Max. Cable
Length Using
Belden™ 8723
Max. Cable
Length Using
Belden 8489
Max. Cable
Length Using
Belden 8620
15” EndoVue® (Rev C and below)
90R0007
11.4 Volts
50 Watts
90 Watts
193.5 ft
452.9 ft
646.5 ft
15” EndoVue® (Rev D and above)
90R0007
11.4 Volts
50 Watts
120 Watts
190.5 ft
445.9 ft
636.4 ft
15” EndoVue® HD
90K0005
11.4 Volts
40 Watts
120 Watts
217.7 ft
509.6 ft
727.3 ft
19” EndoVue®
90R0004
10.8 Volts
60 Watts
90 Watts
145.1 ft
339.7 ft
484.8 ft
19” EndoVue® HD
90K0006
10.8 Volts
60 Watts
120 Watts
161.6 ft
378.3 ft
540.0 ft
24” EndoVue® HD
90K0001, 90K0004
22.0 Volts
90 Watts
120 Watts
33.3 ft
77.8 ft
111.1 ft
19” Radiance® (Rev J and below)
90R0001
10.8 Volts
60 Watts
90 Watts
145.1 ft
339.7 ft
484.8 ft
19” Radiance® (Rev K and above)
90R0001
10.8 Volts
60 Watts
120 Watts
161.6 ft
378.3 ft
540.0 ft
19” Radiance® HD
90R0015
10.8 Volts
60 Watts
90 Watts
145.1 ft
339.7 ft
484.8 ft
19” Radiance® Full MMI
90R0035
10.8 Volts
65 Watts
120 Watts
149.2 ft
349.2 ft
498.5 ft
23” Radiance® HD
90R0013, 90R0014,
90R0018, 90R0021
22.0 Volts
80 Watts
120 Watts
37.4 ft
87.6 ft
125.0 ft
24” Radiance® Full MMI
90R0019, 90R0022,
90R0037, 90R0038
22.0 Volts
115 Watts
120 Watts
13.6 ft
31.8 ft
45.5 ft
26” Radiance® HD
90R0020, 90R0023
22.0 Volts
115 Watts
120 Watts
13.6 ft
31.8 ft
45.5 ft
26” Radiance® Full MMI
90R0029, 90R0030
22.0 Volts
115 Watts
120 Watts
13.6 ft
31.8 ft
45.5 ft
26” Radiance® G2
90R0050, 90R0051
22.8 Volts
60 Watts
120 Watts
31.0 ft
72.6 ft
103.6 ft
26” Radiance® G2 HB
90R0052, 90R0053
22.5 Volts
95 Watts
150 Watts
24.2 ft
56.6 ft
80.7 ft
90R0005
22.8 Volts
110 Watts
120 Watts
16.9 ft
39.6 ft
56.5 ft
90R0033, 90R0034
22.8 Volts
130 Watts
150 Watts
14.3 ft
33.5 ft
47.8 ft
32” Radiance®
32” Radiance® Full MMI
w w w.ndssi.com
Corporate Headquarters
Europe
Asia Pacific
5750 Hellyer Avenue
San Jose, CA 95138 (USA)
Tel: 408 776 0085
Toll Free: 866 637 5237
Email: info@ndssi.com
Nijverheidscentrum 28
2761 JP Zevenhuizen (ZH)
The Netherlands
Tel: + 31 180 63 43 56
Email: info@ndssi.com
Takanawa Kaneo Bldg., 6F
3-25-22 Takanawa
Minato-ku Tokyo, Japan, 108-0074
Tel: + 81 3 5475 1835
Email: info@ndssi.jp
© 2011 NDS Surgical Imaging. Features and specifications are subject to change without notice. This product is capable of displaying radiology (PACS) images for reference purposes only. Products may not be available in
all markets and are subject to the regulatory or medical practices that govern individual markets. Always refer to the package insert, product label and/or user instructions before using any NDSsi product. Contact your
NDSsi representative for more information. All trademarks are property of their respective owners.
Page 3 of 3
Doc #72H0006 Rev A