FIBER OP
TIC TRANSMISSION SYSTEM
N377 & N357 SERIES
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User Manual
Infinova
Contents
SERVICE NOTICE.................................................................................................................1
PRODUCT DESCRIPTION....................................................................................................2
ORDERING INFORMATION ................................................................................................3
INSTALLATION.....................................................................................................................3
POWER SUPPLY....................................................................................................................4
TRANSCEIVER PANEL ........................................................................................................6
N3774XA/XB-1-M/R & N3574XA/XB-1-M/R......................................................................6
N3774XA/XB-4-M/R & N3574XA/XB-4-M/R......................................................................7
N3774XA/XB-8-M/R & N3574XA/XB-8-M/R......................................................................8
N3774XA/XB-12-M/R & N3574XA/XB-12-M/R..................................................................9
AUDIO INPUT IMPEDANCE SETTINGS..........................................................................10
TYPICAL SYSTEM CONNECTION...................................................................................11
TRANSMISSION REPEATER.............................................................................................12
CABLE DIAMETER CALCULATION AND LIGHTNING & SURGE PROTECTION ....13
1
SERVICE NOTICE
The installation of this product should be made by qualified personnel. Do not attempt to
service this product yourself. Refer all servicing to qualified personnel.
If you require information during installation of this product or if service seems necessary,
contact the local suppliers or Infinova at 1-732-355-9100 in 51 Stouts Lane, Monmouth
Junction, NJ 08852 U.S.A. You must obtain a Return Authorization Number and shipping
instructions before returning any product for service.
Our obligation under this warranty is limited only to the repair or replacement of any of our
products, provided that products are used within the specified ratings and applications, and
that products are applied in accordance with good engineering practices, and that products
are proved by our examination to be defective.
This warranty does not extend to any Infinova products which have been subject to acts of
accident, misuse, abuse, neglect, improper application or installation, improper operation or
maintenance, connection to an improper voltage supply or to materials which have been
altered or repaired outside an authorized Infinova factory repair center.
Information provided by Infinova is accurate and reliable. However, no responsibility is
assumed by Infinova for its use; nor for any infringements of other rights of third parties
which may result from its use. No license is granted by implications or otherwise under any
patent or patent rights of Infinova.
WARNING
TO REDUCE THE RISK OF FIRE OR SHOCK HAZARD, DO NOT EXPOSE T HIS PRODUCT TO
RAIN OR MOISTURE.
DO NOT LOOK INTO OPTICAL PORTS WITH POWER ON.
2
PRODUCT DESCRIPTION
Description
The N3774 and N3574 series transceiver provides the ability to transmit and receive one,
four, eight or twelve duplex audio over one optical fiber. Audio format factory selectable
600Ω balanced, 600Ω unbalanced, 10kΩ unbalanced and 47kΩ unbalanced. Plug-and-play
design ensures ease of installation requiring no electrical or optical adjustments. Each
transmitter or receiver incorporates status indicators for monitoring of proper system
operation. The modules are available in either stand-alone or card unit versions.
Stand-alone module Card unit
The N3774 series are compatible with 9/125micron single-mode fibers; the N3574 series are
compatible with 50/125 or 62.5/125micron multimode fibers.
Transceiver N3774XA is compatible with transceiver N3774XB; transceiver N3574XA is
compatible with transceiver N3574XB.
Accessories (optional)
N3910-000 19" 1U fan assembly unit
N3951 Fiber optical transmission repeater
System Diagram
3
ORDERING INFORMATION
Multi-mode products:
N3574XA-1-M/R Digital 1 duplex factory selectable audio transceiver, module/card
N3574XB-1-M/R Digital 1 duplex factory selectable audio transceiver, module/card
N3574XA-4-M/R Digital 4 duplex factory selectable audio transceiver, module/card
N3574XB-4-M/R Digital 4 duplex factory selectable audio transceiver, module/card
N3574XA-8-M/R Digital 8 duplex factory selectable audio transceiver, module/card
N3574XB-8-M/R Digital 8 duplex factory selectable audio transceiver, module/card
N3574XA-12-M/R Digital 12 duplex factory selectable audio transceiver, module/card
N3574XB-12-M/R Digital 12 duplex factory selectable audio transceiver, module/card
Single-mode products:
N3774XA-1-M/R Digital 1 duplex factory selectable audio transceiver, module/card
N3774XB-1-M/R Digital 1 duplex factory selectable audio transceiver, module/card
N3774XA-4-M/R Digital 4 duplex factory selectable audio transceiver, module/card
N3774XB-4-M/R Digital 4 duplex factory selectable audio transceiver, module/card
N3774XA-8-M/R Digital 8 duplex factory selectable audio transceiver, module/card
N3774XB-8-M/R Digital 8 duplex factory selectable audio transceiver, module/card
N3774XA-12-M/R Digital 12 duplex factory selectable audio transceiver, module/card
N3774XB-12-M/R Digital 12 duplex factory selectable audio transceiver, module/card
INSTALLATION
Installation of a udio inte rfa c e
To install the apparatus, it is necessary to allow enough space to accommodate the bend
radius of the optical cable connected to it. Audio interface uses 1, 2 and 3 20-position
terminal block connectors for 1A,4A, 8A and 12A transmission respectively.
Installation of card unit
To install in the chassis, orient the card with the Infinova logo at the top of the module and
slide onto the top and bottom card guides in the chassis. Press securely on the top and
bottom of the module to ensure that it is fully seated in the chassis so that the electrical
connector mates with the chassis-mounted motherboard. Once installed, manually tighten
the two thumbscrews located at the top and bottom of the card. Do not use tools to secure
these and do not over tighten.
4
Full load of N3910-18S
There are 18 slots on N3910-18S. Besides N3910-18S, there are N3910-1S, N3910-2S,
N3910-3S, N3910-4S and N3910-15R optional. There are 1 slot on N3910-1S, 2 slots on
N3910-2S, 3 slots on N3910-3S, 4 slots on N3910-4S and 15 slots on N3910-15R
respectively.
WARNING:
A FULL LOAD OF N3910-15R AND N3910-18S SUBRACK REQUIRES FORCED AIR
COOLING IN THE RACK. TO AVOID OVER HEATING OF CARD UNITS,
WHENEVER POSSIBLE, INSTALL IN EVERY OTHER SUBRACK.
Forced air cooling with N3910-000
POWER SUPPLY
Power supply for card unit
The N3774 and N3574 card unit is powered by a plug-in power supply that is provided with
the appropriate desk chassis or EIA 19" subrack.
Power supply for stand-alone module
The N3774 and N3574 card unit can be converted into a stand-alone module when installing
into proper N3910 chassis that is powered by a plug-in 24VAC (N3921-24AC-1 for 110V;
N3921-24AC-2 for 230V) power supply. Plug the wires into the connectors, fasten the
screws to make a firm connection, see figure below.
5
N3921 power supply Connection Diagram
Note:
When the series is powered together with other devices (cameras and etc.) by a single
24VAC power source, please make sure that the related device has a full-wave (bridge)
rectifier circuit.
6
TRANSCEIVER PANEL
N3774XA/XB-1-M/R & N3574XA/XB-1-M/R
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OP
Power on indicator(red) Optical link loss indicator(red)
Chassis GND
Optical port, FC or ST
CH1 Audio input indicator(green)
CH1 Audio output indicator(green)
1
1 Audio channel
Refer to table 1 for detailed
pin assignments for audio.
Earthing for loss indicator
7
TRANSCEIVER PANEL
N3774XA/XB-4-M/R & N3574XA/XB-4-M/R
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OP
Power on indicator(red) Optical link loss indicator(red)
Chassis GND
Optical port, FC or ST
CH1 Audio input indicator(green)
CH1 Audio output indicator(green)
CH2 Audio input indicator(green)
CH2 Audio output indicator(green)
CH3 Audio input indicator(green)
CH3 Audio output indicator(green)
CH4 Audio input indicator(green)
CH4 Audio output indicator(green)
1
2
3
4
1 Audio channel
2 Audio channel
3 Audio channel
4 Audio channel
Refer to table 1 for detailed
pin assignments for audio.
Earthing for loss indicator
8
TRANSCEIVER PANEL
N3774XA/XB-8-M/R & N3574XA/XB-8-M/R
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OP
Power on indicator(red)
Chassis GND
1
2
3
4
1 Audio channel
2 Audio channel
3 Audio channel
4 Audio channel
5 Audio channel
6 Audio channel
7 Audio channel
8 Audio channel
Refer to table 1 for detailed
pin assignments for audio.
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Optical link loss indicator(red)
Optical port, FC or ST
CH5 Audio input indicator(green)
CH5 Audio output indicator(green)
CH6 Audio input indicator(green)
CH6 Audio output indicator(green)
CH7 Audio input indicator(green)
CH7 Audio output indicator(green)
CH8 Audio input indicator(green)
CH8 Audio output indicator(green)
5
6
7
8
Earthing for loss indicator
9
TRANSCEIVER PANEL
N3774XA/XB-12-M/R & N3574XA/XB-12-M /R
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OP
Power on indicator(red)
Chassis GND
{
{
{
{
1
2
3
4
1 Audio channel
2 Audio channel
3 Audio channel
4 Audio channel
5 Audio channel
6 Audio channel
7 Audio channel
8 Audio channel
9 Audio channel
10 Audio channel
11 Audio channel
12 Audio channel
Refer to table 1 for detailed
pin assignments for audio.
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Optical link loss indicator(red)
Optical port, FC or ST
CH9 Audio input indicator(green)
CH9 Audio output indicator(green)
CH10 Audio input indicator(green)
CH10 Audio output indicator(green)
CH11 Audio input indicator(green)
CH11 Audio output indicator(green)
CH12 Audio input indicator(green)
CH12 Audio output indicator(green)
{
{
{
{
5
6
7
8
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OP
{
{
{
{
9
10
11
12
Earthing for surge protection
10
AUDIO INPUT IMPEDANCE SETTINGS
Figure 1 shows the detailed location and concise function of jumper for setting audio input
impedance, take 4A transceiver for example. There is 1 jumper for each audio input
impedance.
Jumper for setting CH1 Audio
input impedance
Mid
Setting input imped anc e
Jumper for setting CH2 Audio
input impedance
Jumper for setting CH3 Audio
input impedance
Jumper for setting CH4 Audio
input impedance
Figure 1. Audio jumper locations
For detailed jumper setting and pin assignments please refer to table 1.
Table 1. Audio input impedance setting and pin assignments references
Note:
In table 1, Pin 1 denotes the pin with the MINIMUM number of each audio channel; Pin 5
denotes the pin with the MAXIMUM number of each audio channel.
11
TYPICAL SYSTEM CONNECTION
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OP PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OP
Fiber
Earthing
Earthing
N3774XA-4 N3774XB-4
Figure 2. Typical application diagram
12
TRANSMISSION REPEATER
The N3951 series is used between transmitter and receiver to extend the transmission
distance of fiber optical system. It magnifies the optical signal received from transmitter, and
sends it to receiver. By using a N3951, the transmission distance of the system is doubled.
Typical application connection
PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OP PWR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
OP
Fiber
Earthing
Earthing
N3774XA-4 N3774XB-4
O
U
T
I
N
Fiber
N3951
Figure 3. Transmission repeater
13
CABLE DIAMETER CALCULATION AND LIGHTNING & SURGE PROTECTION
Relation between 24VAC Cable Diameter and Transmission Distance
In general, the maximum allowable voltage loss rate is 10% for AC-powered devices. The
table below shows the relationship between transmission power and maximum transmission
distance under a certain specified cable diameter, on condition that the 24VAC voltage loss
rate is below 10%. According to the table, if a device rated at 50W is installed 17-meter
away from the transformer, the minimum cable diameter shall be 0.8000mm. A lower
diameter value tends to cause voltage loss and even system instability.
0.8000 1.000 1.250 2.000
10 283 (86) 451 (137) 716 (218) 1811 (551)
20 141 (42) 225 (68) 358 (109) 905 (275)
30 94 (28) 150 (45) 238 (72) 603 (183)
40 70 (21) 112 (34) 179 (54) 452 (137)
50 56 (17) 90 (27) 143 (43) 362 (110)
60 47 (14) 75 (22) 119 (36) 301 (91)
70 40 (12) 64 (19) 102 (31) 258 (78)
80 35 (10) 56 (17) 89 (27) 226 (68)
90 31 (9) 50 (15) 79 (24) 201 (61)
100 28 (8) 45 (13) 71 (21) 181 (55)
110 25 (7) 41 (12) 65 (19) 164 (49)
120 23 (7) 37 (11) 59 (17) 150 (45)
130 21 (6) 34 (10) 55 (16) 139 (42)
140 20 (6) 32 (9) 51 (15) 129 (39)
150 18 (5) 30 (9) 47 (14) 120 (36)
160 17 (5) 28 (8) 44 (13) 113 (34)
170 16 (4) 26 (7) 42 (12) 106 (32)
180 15 (4) 25 (7) 39 (11) 100 (30)
190 14 (4) 23 (7) 37 (11) 95 (28)
200 14 (4) 22 (6) 35 (10) 90 (27)
Power (W)
Diameter (mm)
Distance (ft / m)
14
Lightning & Surge Protection
The product adopts multi-level anti-lightning and anti-surge technology integrated with gas
discharge tube, power resistor and TVS tube. The powerful lightning and surge protection
barrier effectively avoids product damage caused by various pulse signals with power below
4kV, including instantaneous lightning, surge and static. However, for complicated outdoor
environment, refer to instruction below for lightning and surge protection:
The product features with dedicated earth wire, which must be firmly grounded. As for
surveillance sites beyond the effective protection scope, it’s necessary to erect
independent lightening rods to protect the security devices. It’s recommended to separate
the lightning rod from the mounting pole, placing the rod on an independent pole, as
shown in the figure below. If the product has to be installed on the same pole or pedestal
for lightning rod, there should be strict insulation between the video cable BNC terminal,
power cable, control cable and the standing pole of the lightning rod.
For suburb and rural areas, it’s recommended to adopt direct burial for the transmission
cables. Overhead wiring is prohibited, because it’s more likely to encounter lightning
strike. Use shielded cables or thread the cables through metal tubes for burial, thus to
ensure the electric connection to the metal tube. In case it’s difficult to thread the cable
through the tube all the way, it’s acceptable to use tube-threaded cables only at both ends
of the transmission line, yet the length in burial should be no less than 15 meters. The
cable sheath and the tube should be connected to the lightning -proof grounding device.
Additional high-power lightning-proof equipment and lightning rods should be installed
for strong thunderstorm or high induced voltage areas (such as high-voltage substation).
The lightning protection and grounding for outdoor devices and wires should be designed
in line with the actual protection requirement, national standards and industrial standards.
The system should perform equipotential grounding by streaming, shielding, clamping
and earthing. The grounding device must meet anti-interference and electric safety
requirements. There should be no short-circuiting or hybrid junction between the device
and the strong grid. Make sure there’s a reliable grounding system, with grounding
resistance below 4Ω (below 10Ω for high soil resistivity regions). The cross-sectional area
of the earthing conductor should be no less than 25mm².
Lightning rod
Front device for
surveillance system
Separated layout for the lightning
rod and the standing pole
LPZO
B
LPZO
A
Mounting pole
for front device
30° 30°
51 Stouts Lane, Monmouth Junction, NJ 08852, U.S.A.
Tel: 1-888-685-2002 (toll-free, USA)
1-732-355-9100
Fax: 1-732-355-9101
E-mail: sales@infinova.com
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