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Technical Information
COM-C-UEN103821 Version 2.1 1/12
ContentsThe COM-C communication distribution box by SMA Solar Technology AG is used for cabling of all communication components used in large-scale PV plants with Sunny Central, Sunny Mini Central or Sunny Tripower. This document includes the technical data of the communication distribution box and other important information for planning PV plants with PV inverters by SMA Solar Technology AG and COM-C communication distribution boxes.
COM-CCommunication distributor for large-scale plantsfor SUNNY CENTRAL, SUNNY MINI CENTRAL or SUNNY TRIPOWER
Technical Information Product Details
SMA Solar Technology AG 2/12
1 Product Details• COM-C is a central communication distribution box for a large-scale PV plant. Individual components can
be combined variably. This allows you to adapt the communication distribution box to the individual requirements of your large-scale PV plant. The basic equipment of the COM-C includes safety sockets and a 24 V power supply unit. All other components can be ordered from SMA Solar Technology AG.
• With the Sunny WebBox available as an option, one can detect up to 50 nodes. Up to 3 Sunny WebBox devices can be selected. Sunny Central inverters can be connected to the Sunny WebBox via Ethernet; Sunny Mini Central and Sunny Tripower via RS485. Please use shielded cables with twisted pairs. Use at least a 5/5e category SF/UTP cable as a network cable. If there are large distances between nodes, one can use fiber-optic cables. For this you require the media converters available as an option.
• COM-C is suitable for indoor and outdoor installation. The communication distribution box for outdoor installation is available for base and wall mounting. Please observe that grid voltage is required to supply the COM-C.
• Using the optional GSM/GPRS or 3G-UMTS router allows you to transfer measurement data to the Sunny Portal even from remote locations where there is no DSL or telephone connection. The required external antenna is included in the scope of delivery.
• All routers used by SMA Solar Technology AG allow you to set up virtual private networks (VPN). This allows remote access to the plants in order to perform remote diagnoses.
Technical Information Product Details
SMA Solar Technology AG 3/12
1.1 COM-C Variant Matrix for Indoor Installation“x” = can be combined; “‒” = cannot be combined
Sunny WebBox, Sunny WebBox including Sunny SensorBox
Router Power Reducer
Box
8-port Ethernet switch
RJ-45/Fiber-optic cableNo
t insta
lled
1 Ethe
rnet
2 Ethe
rnet
3 Ethe
rnet
1 RS4
852 R
S485
1 Ethe
rnet, 1
RS48
5, 1 S
unny
Senso
rBox
1 RS4
85, 1
Sunn
y Sen
sorBo
x2 R
S485
, 1 Su
nny S
enso
rBox
3 RS4
85, 1
Sunn
y Sen
sorBo
xNo
t insta
lled
1 GSM
/GPR
S2:
GSM
/GPR
SDS
L, no
mod
em3G
-UM
TS Ro
uter
Not in
stalle
d1 d
evice
2 dev
ices
Not in
stalle
d1 d
evice
2 dev
ices
3 dev
ices
4 dev
ices
Not in
stalle
d1 d
evice
/mult
i-mod
e2 d
evice
s/mu
lti-mod
e3 d
evice
s/mu
lti-mod
e4 d
evice
s/mu
lti-mod
e1 d
evice
/sing
le-mo
de2 d
evice
s/sin
gle-m
ode
3 dev
ices/
single
-mod
e4 d
evice
s/sin
gle-m
ode
Sunn
y Web
Box,
Sunn
y Web
Box
includ
ing Su
nny S
enso
rBox
Not installed X X X X X − − − X X X X X X X X X X X X X X1 Ethernet X X X X X − − − X X X X X X X X X X X X X X2 Ethernet X X X X X − − − X X X X X X X X X X X X X X3 Ethernet X X X X X − − − X X X X X X X X X X X X X X1 RS485 − − − − − − − − − − − − − − − − − − − − − −2 RS485 − − − − − − − — − − − − − − − − − − − − − −1 Ethernet, 1 RS485, 1 Sunny SensorBox
− − − − − − − — − − − − − − − − − − − − − −
1 RS485, 1 Sunny SensorBox
− − − − − − − − − − − − − − − − − − − − − −
2 RS485, 1 Sunny SensorBox
− − − − − − − — − − − − − − − − − − − − − −
3 RS485, 1 Sunny SensorBox
− − − − − − — — − − − − − − − − − − − − − −
Route
r
Not installed X X X X − − − − − − − − − X X X X X X X X X X X X X XGSM/GPRS X X X X − − − − − − − − − X X X X X X X X X X X X X X2: GSM/GPRS X X X X − − − − − − − − − X X X X X X X X X X X X X XDSL, no modem X X X X − − − − − − − − − X X X X X X X X X X X X X X3G-UMTS Router X X X X − − − − − − − − − X X X X X X X X X X X X X X
Powe
r Re
duce
r Bo
x
Not installed − − − − − − − − − − − − − − − − − − − − − − − − − − − − −1 device − − − ― − − − − − — − − − − − − − − − − − − − − − − − − −2 devices − − ― — − ― ― − — — − − − − − − − − − − − − − − − − − − −
8-port
Eth
ernet
switc
h
Not installed X X X X − − − − − − X X X X X X X X X X X X X X X X X1 device X X X X − − − − − − X X X X X X X X X X X X X X X X X2 devices X X X X − − − − − − X X X X X X X X X X X X X X X X X3 devices X X X X − − − − − − X X X X X X X X X X X X ― X X X ―4 devices X X X X − − − − − − X X X X X X X X X X X ― ― X X ― —
Technical Information Product Details
SMA Solar Technology AG 4/12
RJ-45
/Fibe
r-opti
c cab
le
Not installed X X X X − − − − − − X X X X X − − − X X X X X1 device/multi-mode X X X X − − − − − − X X X X X − − − X X X X X2 devices/multi-mode X X X X − − − − − − X X X X X − − − X X X X X3 devices/multi-mode X X X X − − − − − − X X X X X − − − X X X X ―4 devices/multi-mode X X X X − − − − − − X X X X X − − − X X X ― ―1 device/single-mode X X X X − − − − − − X X X X X − − − X X X X X2 devices/single-mode
X X X X − − − − − − X X X X X − − − X X X X X
3 devices/single-mode
X X X X − − − − − − X X X X X − − − X X X X ―
4 devices/single-mode
X X X X − − − − − − X X X X X − − − X X X ― —
Sunny WebBox, Sunny WebBox including Sunny SensorBox
Router Power Reducer
Box
8-port Ethernet switch
RJ-45/Fiber-optic cable
Not in
stalle
d1 E
therne
t2 E
therne
t3 E
therne
t1 R
S485
2 RS4
851 E
therne
t, 1 RS
485,
1 Sun
ny Se
nsorBo
x1 R
S485
, 1 Su
nny S
enso
rBox
2 RS4
85, 1
Sunn
y Sen
sorBo
x3 R
S485
, 1 Su
nny S
enso
rBox
Not in
stalle
d1 G
SM/G
PRS
2: GS
M/G
PRS
DSL,
no m
odem
3G-U
MTS
Route
rNo
t insta
lled
1 dev
ice2 d
evice
sNo
t insta
lled
1 dev
ice2 d
evice
s3 d
evice
s4 d
evice
sNo
t insta
lled
1 dev
ice/m
ulti-m
ode
2 dev
ices/
multi-m
ode
3 dev
ices/
multi-m
ode
4 dev
ices/
multi-m
ode
1 dev
ice/s
ingle-
mode
2 dev
ices/
single
-mod
e3 d
evice
s/sin
gle-m
ode
4 dev
ices/
single
-mod
e
Technical Information Product Details
SMA Solar Technology AG 5/12
1.2 COM-C Variant Matrix for Outdoor installation“x” = can be combined; “‒” = cannot be combined
Sunny WebBox, Sunny WebBox including Sunny SensorBox
Router Power Reducer
Box
8-port Ethernet switch
RJ-45/Fiber-optic cableNo
t insta
lled
1 Ethe
rnet
2 Ethe
rnet
3 Ethe
rnet
1 RS4
852 R
S485
1 Ethe
rnet, 1
RS48
5, 1 S
unny
Senso
rBox
1 RS4
85, 1
Sunn
y Sen
sorBo
x2 R
S485
, 1 Su
nny S
enso
rBox
3 RS4
85, 1
Sunn
y Sen
sorBo
xNo
t insta
lled
GSM
/GPR
S2:
GSM
/GPR
SDS
L, no
mod
em3G
-UM
TS Ro
uter
Not in
stalle
d1 d
evice
2 dev
ices
Not in
stalle
d1 d
evice
2 dev
ices
3 dev
ices
4 dev
ices
Not in
stalle
d1 d
evice
/mult
i-mod
e2 d
evice
s/mu
lti-mod
e3 d
evice
s/mu
lti-mod
e4 d
evice
s/mu
lti-mod
e1 d
evice
/sing
le-mo
de2 d
evice
s/sin
gle-m
ode
3 dev
ices/
single
-mod
e4 d
evice
s/sin
gle-m
ode
Sunn
y Web
Box,
Sunn
y Web
Box
includ
ing Su
nny S
enso
rBox
Not installed X X X X X X X X X X X X X X X X X X X X X X1 Ethernet X X X X X X X X X X X X X X X X X X X X X X2 Ethernet X X X X X X X ― X X X X X X X X X X X X X X3 Ethernet X X X X X X ― — X X X X X X X X X X X X X X1 RS485 X X X X X X X X X X X X X X X X X X X X X X2 RS485 X X X X X X X — X X X X X X X X X X X X X X1 Ethernet, 1 RS485, 1 Sunny SensorBox
X X X X X X X — X X X X X X X X X X X X X X
1 RS485, 1 Sunny SensorBox
X X X X X X X X X X X X X X X X X X X X X X
2 RS485, 1 Sunny SensorBox
X X X X X X X — X X X X X X X X X X X X X X
3 RS485, 1 Sunny SensorBox
X X X X X X — — X X X X X X X X X X X X X X
Route
r
Not installed X X X X X X X X X X X X X X X X X X X X X X X X X X XGSM/GPRS X X X X X X X X X X X X X X X X X X X X X X X X X X X2: GSM/GPRS X X X X X X X X X X X X X X X X X X X X X X X X X X XDSL, no modem X X X X X X X X X X X X X X X X X X X X X X X X X X X3G-UMTS Router X X X X X X X X X X X X X X X X X X X X X X X X X X X
Powe
r Re
duce
r Bo
x
Not installed X X X X X X X X X X X X X X X X X X X X X X X X X X X X X1 device X X X ― X X X X X — X X X X X X X X X X X X X X X X X X X2 devices X X ― — X ― ― X — — X X X X X X X X X X X X X X X X X X X
8-port
Eth
ernet
switc
h
Not installed X X X X X X X X X X X X X X X X X X X X X X X X X X X1 device X X X X X X X X X X X X X X X X X X X X X X X X X X X2 devices X X X X X X X X X X X X X X X X X X X X X X X X X X X3 devices X X X X X X X X X X X X X X X X X X X X X X ― X X X ―4 devices X X X X X X X X X X X X X X X X X X X X X ― ― X X ― —
Technical Information Product Details
SMA Solar Technology AG 6/12
RJ-45
/Fibe
r-opti
c cab
le
Not installed X X X X X X X X X X X X X X X X X X X X X X X1 device/multi-mode X X X X X X X X X X X X X X X X X X X X X X X2 devices/multi-mode
X X X X X X X X X X X X X X X X X X X X X X X
3 devices/multi-mode
X X X X X X X X X X X X X X X X X X X X X X ―
4 devices/multi-mode
X X X X X X X X X X X X X X X X X X X X X ― ―
1 device/single-mode
X X X X X X X X X X X X X X X X X X X X X X X
2 devices/single-mode
X X X X X X X X X X X X X X X X X X X X X X X
3 devices/single-mode
X X X X X X X X X X X X X X X X X X X X X X ―
4 devices/single-mode
X X X X X X X X X X X X X X X X X X X X X ― —
Sunny WebBox, Sunny WebBox including Sunny SensorBox
Router Power Reducer
Box
8-port Ethernet switch
RJ-45/Fiber-optic cable
Not in
stalle
d1 E
therne
t2 E
therne
t3 E
therne
t1 R
S485
2 RS4
851 E
therne
t, 1 RS
485,
1 Sun
ny Se
nsorBo
x1 R
S485
, 1 Su
nny S
enso
rBox
2 RS4
85, 1
Sunn
y Sen
sorBo
x3 R
S485
, 1 Su
nny S
enso
rBox
Not in
stalle
dGS
M/G
PRS
2: GS
M/G
PRS
DSL,
no m
odem
3G-U
MTS
Route
rNo
t insta
lled
1 dev
ice2 d
evice
sNo
t insta
lled
1 dev
ice2 d
evice
s3 d
evice
s4 d
evice
sNo
t insta
lled
1 dev
ice/m
ulti-m
ode
2 dev
ices/
multi-m
ode
3 dev
ices/
multi-m
ode
4 dev
ices/
multi-m
ode
1 dev
ice/s
ingle-
mode
2 dev
ices/
single
-mod
e3 d
evice
s/sin
gle-m
ode
4 dev
ices/
single
-mod
e
Technical Information Technical Data
SMA Solar Technology AG 7/12
2 Technical Data2.1 COM-C for Indoor InstallationGeneral Data for the Enclosure
Mechanical Data for the Enclosure
* The weight of the enclosure changes according to the weight of variant-dependent equipment.
Grid connection
* Clamping range of the cage clamp terminal: 0.08 mm² … 2.5 mm².
Basic Equipment
Wall mounting YesMaterial Steel plateColor scheme RAL 7035 structureLock cylinder Switch cabinet key, dual bit
Width x Height x Depth 760 mm x 760 mm x 300 mmWeight* 50 kg
Nominal voltage 230 VFrequency 50 Hz / 60 HzNominal current 1.0 AMaximum back-up fuse protection 16.0 AConnection terminal type* 3-conductor terminal
Protective contact plugs 5Power supply unit 1 x 230 VAC / 24 VDC
Technical Information Technical Data
SMA Solar Technology AG 8/12
Variant-Dependent Equipment
* including external antenna** without modem
Variant-Dependent Interfaces
Protection Rating and Ambient Conditions
* According to EN 60529** Non condensing *** According to DIN EN 50178:1197
GSM/GPRS router* 2 at maximumDSL router** 1 at maximum3G-UMTS router* 1 at maximumSunny WebBox 3 at maximum8-port Ethernet switch 4 at maximumMulti- or single-mode media converter, RJ-45/fiber-optic cable
4 at maximum
Communication GSM/GPRS / UMTS / DSL / Ethernet / RS485 communication
Protection rating* IP 54Permissible ambient temperatures − 20 °C … +50 °CRelative humidity** Uair 10 % … 90 %Tolerable contamination*** 2Maximum altitude above sea level, AMSL 1 000 m
Technical Information Technical Data
SMA Solar Technology AG 9/12
2.2 COM-C for Outdoor InstallationGeneral Data for the Enclosure
* optional** prepared for customer mounting*** only for base mounting
Mechanical Data for the Base
* The weight of the enclosure and base changes according to the weight of the variant-dependent equipment.
Mechanical Data for the Enclosure
* The weight of the enclosure changes according to the weight of variant-dependent equipment.
Grid connection
* Clamping range: 0.08 mm² … 2.5 mm².
UV resistance YesBase installation* YesWall mounting* YesMaterial Fiber glass reinforced polyesterColor scheme RAL 7035 light gray, solid-coloredLock cylinder (double-bit) with switch cabinet key** YesCable support rail*** Yes
Width x Height x Depth 1 100 mm x 940 mm x 310 mmBurial depth 600 mm at maximumWeight 25 kgTotal weight, enclosure and base* 65 kg
Width x Height x Depth 1 000 mm x 750 mm x 320 mmWeight* 40 kg
Nominal voltage 230 VFrequency 50 Hz / 60 HzNominal current 1.0 AMaximum back-up fuse protection 16.0 AConnection terminal type* 3-conductor terminal
Technical Information Technical Data
SMA Solar Technology AG 10/12
Connecting Optional Components
* Clamping range of the cage clamp terminal: 0.14 mm² … 1.5 mm². Connecting the cable shield with shield terminal clamps.
Basic Equipment
Variant-Dependent Equipment
* including external antenna** without modem
Variant-Dependent Interfaces
Protection Rating and Ambient Conditions
* According to EN 60529** Non condensing *** According to DIN EN 50178:1197
Digital inputs for Power Reducer Box* 4-conductor connection terminalRS485 for Sunny WebBox* 4-conductor connection terminalRS485 for Sunny SensorBox* 4-conductor connection terminal
Number of electric safety sockets 5Power supply unit 1 x 230 VAC / 24 VDC
GSM/GPRS router* 1 at maximumDSL router** 1 at maximum3G-UMTS router* 1 at maximumSunny WebBox 1 at maximum8-port Ethernet switch 2 at maximumMulti- or single-mode media converter, RJ-45/fiber-optic cable
2 at maximum
Communication GSM/GPRS / UMTS / DSL / Ethernet / RS485 communication
Protection rating* IP 54Permissible ambient temperatures − 20 °C ... +50 °CRelative humidity** Uair 10 % … 90 %Tolerable contamination*** 2Maximum altitude above sea level, AMSL 1 000 m
Technical Information Dimensions
SMA Solar Technology AG 11/12
3 Dimensions3.1 Indoor installation
Technical Information Dimensions
SMA Solar Technology AG 12/12
3.2 Outdoor installation
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