Korenix JetNet 3705-24V User manual

JetNet 3705-24V
5-port Industrial Fast Ethernet PoE Switch
User Manual
Revision V1.0

FCC Warning
This Equipment has been tested and found to comply with the limits for a
Class-A digital device, pursuant to Part 15 of the FCC rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses, and can
radiate radio frequency energy. It may cause harmful interference to radio
communications if the equipment is not installed and used in accordance
with the instructions. However, there is no guarantee that interference will
not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
CE Mark Warning
This is a Class-A product. In a domestic environment this product may cause
radio interference in which case the user may be required to take adequate
measures.

Content
Introduction................................................................ 1
Features................................................................... 1
Package Contents................................................... 2
Hardware Description ............................................... 3
Physical Dimension................................................. 3
Front Panel.............................................................. 4
Top View.................................................................. 4
LED Indicators......................................................... 5
Ports......................................................................... 6
Cabling..................................................................... 7
Wiring the Power Inputs ........................................ 8
Wiring the Fault Alarm Contact............................. 9
Mounting Installation .............................................. 10
DIN-Rail Mounting................................................. 10
Wall Mounting.........................................................11
Hardware Installation.............................................. 13
Installation Steps................................................... 13
Network Application................................................ 14
Troubleshooting ...................................................... 15
Technical Specification........................................... 16

JetNet 3705-24V 5-port Industrial Fast Ethernet Power over Ethernet Switch
1
Introduction
The JetNet 3705-24V Industrial Switch is 5-port Fast Ethernet switch with 4 IEEE-
802.3af PoE injectors with one DC booster for transportation PoE application. The
internal DC booster can boost Dc power from 24V to 48V to compliance with IEEE
802.3af Power over Ethernet standard. It offers 60 watts power budget to satisfy 4 ports
15.4w power consumption. With the rugged Aluminum alloy housing, the JetNet 3705-
24V survived under -25°C ~ 60°C environment temperature give your Power over
Ethernet application best reliability.
Features
System Interface/Performance
¾RJ-45 ports support Auto MDI/MDI-X Function
¾Embedded 4-port PoE Injection
¾Store-and-Forward Switching Architecture
¾Back-plane (Switching Fabric): 1.0Gbps
¾2K MAC Address Table
Power Input
¾DC 24V~48V Redundant Power Input
Operating Temperature
¾Standard: -25°C ~ 60°C
Case/Installation
¾IP-30 Protection
¾Installation in a Pollution Degree 2 environment
¾DIN Rail and Wall Mount Design

2
Package Contents
Please refer to the package contents list below to verify them against the checklist.
JetNet 3705-24V
User manual
Removable Terminal Block- installed on the device
Wall-mount Kit (2 wall-mount bracket with screws)
Compare the contents of the industrial switch with the standard checklist above. If any
item is damaged or missing, please contact the local dealer for service.

3
Hardware Description
In this paragraph, the Industrial switch’s hardware specs, ports, cabling information, and
wiring installation will be described.
Physical Dimension
JetNet 3705-24V dimensions (W x D x H) is 48.6mm x 95mm x 140mm, the detail
dimensions as Figure-1
Figure-1: Mechanical Dimension

4
Front Panel
The Front Panel of the JetNet 3705-24V is shown below Figure-2
Figure-2: Front Panel of the PoE Injectors Industrial Switch
Top View
The top view of the JetNet 3705-24V has one terminal block connector of two DC power
inputs and Relay circuit contact. Please refer to Figure-3 for further information.
Figure-3: Top View of the JetNet 3705-24 Industrial Switch

5
LED Indicators
The diagnostic LEDs located on the front panel of the industrial switch provide real-time
information of system and operation status. Table-1 provides the description of the LEDs
status and their definitions for the switch.
LED Color Description
On Power input 1 is active
P1 Green
Off Power input 1 is inactive
On Power input 2 is active
P2 Green
Off Power input 2 is inactive
On Power input 1 or 2 has failed
P-Fail Red
Off Power input 1 and 2 are both functional, or no power
inputs
On The port is supplying power to the powered-device
PoE indicator
(Port 1 ~ 4) Green Off No powered-device attached or power supplying fails
On Connected to network
Flashing Networking is active
Green
Off Not connected to network
On Full-duplex link
Flashing Collision occurs
LAN Port 1 ~ 5
(RJ-45) Amber
Off Half-duplex link or link down
Table-1: LED Indication Definition

6
Ports
RJ-45 ports
The Fast Ethernet ports (RJ-45) will auto-sense for 10Base-T or 100Base-TX
connections. Auto MDI/MDI-X means that the switch can connect to another switch or
workstation without changing straight-through or crossover cabling. Please refer to
Table-2 for RJ-45 pin assignment.
Pin Number Assignment
1 Tx+
2 Tx-
3 Rx+
6 Rx-
Table-2: RJ-45 Pin Assignment
Note “+” and “-” signs represent the polarity of the wires that make up each wire
pair.
All ports on this industrial switch supports automatic MDI/MDI-X operation, users can
use straight-through cables (See figures below) for all network connections to PCs or
Servers, or to other switches/hubs. In straight-through cable, pins 1, 2, 3, and 6, at one
end of the cable, are connected straight through to pins 1, 2, 3 and 6 at the other end of
the cable. Table-3 shows the 10BASE-T/100BASE-TX MDI and MDI-X port pin-outs.
Pin MDI-X Signal MDI Signal
1 Receive Data plus (RD+) Transmit Data plus (TD+)
2 Receive Data minus (RD-) Transmit Data minus (TD-)
3 Transmit Data plus (TD+) Receive Data plus (RD+)
6 Transmit Data minus (TD-) Receive Data minus (RD-)
Table-3: MDI/MDI-X Port Pin-outs

7
The following figures show the cable schematic for straight-through type (Figure-4) and
crossover type (Figure-5).
Switch Router / PC
3 TD+ 3 RD+
6 TD- 6 RD-
1 RD+ 1 TD+
2 RD- 2 TD-
Figure-4: Straight Through Cable Schematic
Switch Switch
3 TD+ 3 RD+
6 TD- 6 RD-
1 RD+ 1 TD+
2 RD- 2 TD-
Figure-5: Crossover Cable Schematic
Cabling
Twisted-pair segments can be connected with unshielded twisted pair (UTP) or
shielded twisted pair (STP) cable. The cable must comply with the IEEE 802.3u
100Base TX standard (e.g. CAT.5, CAT.5e, or CAT.6). The cable between the
equipment and the link partner (switch, hub, workstation, etc.) must be less than
100 meters (328 ft.) long.

JetNet 3705-24V 5-port Industrial Fast Ethernet Power over Ethernet Switch
8
Wiring the Power Inputs
Please follow the steps below to wire the power cord which from the other compliant
external DC power supplier.
1. Insert the positive and negative wires into the PWR1 (V1+, V1-) and PWR2 (V2+,
V1-) contacts on the terminal block connector as shown in Figure-6.
Figure-6: Terminal Block Front View for Power1 & Power2 Contact
2. Tighten the wire-clamp screws which as shown in the Figure-7 for preventing the
wires from loosing.
Figure-7: Terminal Block Top View
Note ¾Use Copper Conductors Only, 60/75
° C, Tighten to 5 lb in
¾The wire gauge for the terminal block should be in the range
between 12~ 24 AWG.
¾Using UL certified AC/DC switching power as power
source. The output power should not less than 70W.
V
2
-
V
2
+
V
1
-
V
1
+

9
Wiring the Fault Alarm Contact
The fault alarm contact is in the middle of terminal block connector as the picture shows
below. Inserting the wires, will detect the fault status including power failure or port link
failure (managed industrial switch only) and from a Normally Close circuit. Please refer
to Figure-8 for the fault alarm contact, and Figure-9 shows the application example for
the fault alarm operation.
Figure-8:
Terminal Block Front View for Fault Alarm Contact
Figure-9:
Fault Alarm Application Example
Note ¾Use Copper Conductors Only, 60/75
° C, Tighten to 5 lb in
¾The wire gauge for the terminal block should be in the range
between 12~ 24 AWG.
¾Recommend using UL certified AC/DC power supply as the
load power source and power consumption not less than 24W.
24V dc, 1A
Resistance

JetNet 3705-24V 5-port Industrial Fast Ethernet Power over Ethernet Switch
10
Mounting Installation
DIN-Rail Mounting
The DIN-Rail bracket is screwed on the switch on the production line in the factory. If the
bracket is not screwed on the switch, please refer to Figure-10 to screw it on the switch.
Follow the steps below to hang the industrial switch.
Figure-10: Rear side of the PoE Injectors Industrial Switch
1. Use the screws to screw the DIN-Rail bracket on the rear side of the industrial
switch.
2. To remove the bracket, reverse the step 1.
DIN-Rail
Bracket

11
3. After the DIN-Rail bracket is screwed on the rear side of the switch, insert the top of
the bracket into the rail. Then, lightly pull-down the bracket into the rail. Be sure the
DIN rail specification is compliance EN 50022 standard. (3.5cm DIN rail )
Figure-11
4. Check if the bracket is tightened on the rail or not.
5. To remove the switch from the rail, reverse steps above.
Wall Mounting
Please refer to Figure-12 and follow the steps below to mount the industrial switch with
wall-mount bracket, and the detail dimension of the bracket as Figure-13.
1. Remove the DIN-Rail bracket from the switch; loose the screws to remove it.
2. Place the wall-mount bracket on the top side and bottom side of the switch.
3. Use the screws to screw the wall-mount bracket on the switch.
4. Use the hook holes at the corners of the wall-mount bracket to hang the industrial
switch on the wall.
5. To remove the wall-mount bracket, reverse steps above.

12
Figure-12: Wall-Mount Bracket Installation
Figure-13: Wall-Mount Bracket Dimension

JetNet 3705-24V 5-port Industrial Fast Ethernet Power over Ethernet Switch
13
Hardware Installation
In this paragraph, we are going to explain how to install the JetNet 3705-24V and the
installation points to be attended to it.
Installation Steps
1. Unpack the Industrial switch packing.
2. Check if the DIN-Rail bracket is screwed on the Industrial switch or not. If the bracket
is not screwed on the Industrial switch, please refer to DIN-Rail Mounting section for
DIN-Rail installation. If the user wants to mount the Industrial switch on the wall, then
please refer to Wall Mounting section for wall mount plate installation.
3. To hang the Industrial switch on the DIN-Rail or wall, please refer to the Mounting
Installation section.
4. Power on the Industrial switch. Please refer to the Wiring the Power Inputs section
for knowing the information about how to wire the power cord. The power LED on the
Industrial switch will light up. Please refer to the LED Indicators section for indication
of LED lights.
5. Prepare the twisted-pair, straight through CAT.5/above cable for Ethernet connection.
6. Insert one side of the RJ-45 cable into the Industrial switch Ethernet port and another
side to the network device’s Ethernet port, e.g. Switch, PC or Server. The Ethernet
port (RJ-45) LED on the Industrial switch will light up when the cable is connected
with the network device. Please refer to the LED Indicators section for LED light
indication.
7. When all connections are set and LED lights all show in normal, the installation is
complete.

JetNet 3705-24V 5-port Industrial Fast Ethernet Power over Ethernet Switch
14
Network Application
This segment provides the sample to help user have more actual idea of industrial
switch application. For a sample application of the industrial switch, see the Figure-14
below.
Figure-14: Network Application
JetNet 3705-24v
Industrial Switch

JetNet 3705-24V 5-port Industrial Fast Ethernet Power over Ethernet Switch
15
Troubleshooting
Verify that you are using the right power cord/supplier/adapter (DC 24V/48V),
please don’t use the power supplier/adapter with a non-compliant DC output voltage,
or it will burn the equipment.
Select the proper UTP/STP cable to construct your network. Please check that you
are using the right cable. Use unshielded twisted-pair (UTP) or shield twisted-pair
(STP) cable for RJ-45 connections: 100ΩCategory 3, 4 or 5 cable for 10Mbps
connections, 100ΩCategory 5 cable for 100Mbps connections, or 100ΩCategory
5e/above cable for 1000Mbps. Also be sure that the length of any twisted-pair
connection does not exceed 100 meters (328 feet).
Diagnosing LED Indicators: To assist in identifying problems, the Switch can be
easily monitored through LED indicators on the front panel, which describe common
problems the user may encounter and where the user can find possible solutions.
If the power indicator does not light on when the power cord is plugged in, user may
have a problem with the power cord. Then check for loose power connections,
power losses or surges at power outlet. If you still cannot resolve the problem,
contact the local dealer for assistance.
If the Industrial switch LED indicators are normal and the connected cables are
correct but the packets still cannot transmit. Please check your system’s Ethernet
devices’ configuration or status.

16
Technical Specification
The technical specifications of JetNet 3705-24V is shown as below.
Standard
IEEE 802.3 10Base-T Ethernet
IEEE 802.3u 100Base-TX Fast Ethernet
IEEE802.3x Flow Control and Back Pressure
IEEE802.3af Power over Ethernet
Protocol CSMA/CD
Transfer Rate 14,880 pps for 10Base-T Ethernet port
148,800 pps for 100Base-TX Fast Ethernet port
MAC Address 2K MAC address table
Connector 10/100TX: 5 x RJ-45
Power, P-Fail: 1 x 6 poles Removable Terminal Block
PoE Pin
Assignment
RJ-45 port #1 ~ # 4 support IEEE 802.3af End-point,
Alternative A mode.
Positive (VCC+): RJ-45 pin 1, 2.
Negative (VCC-): RJ-45 pin 3, 6.
Data (1,2,3,6 )
LED
Per unit: Power 1 (Green), Power 2 (Green), P-Fail (Red)
Per port: Link/Activity (Green), Full duplex/Collision (Amber)
PoE: Feeding Power (Green)

17
Network Cable
10Base-T: 2-pair UTP/STP Cat. 3, 4, 5, 5e, 6 cable
EIA/TIA-568 100-ohm (100m)
100Base-TX: 2-pair UTP/STP Cat. 5, 5e, 6 cable
EIA/TIA-568 100-ohm (100m)
Over Current
Protection Fast-Blown Fuse
Power Supply Redundant power DC 24/48V with connective removable
terminal block
Max Power
Consumption
62.5 Watts (@ 48V); 67 Watts (@ 24V)
Full load with PoE function
Installation DIN-Rail mounting, Wall mounting
Operating Temp. -25oC to 60oC (standard model)
Operating
Humidity 5% to 95% (Non-condensing)
Storage Temp. -40oC to 85oC
Case Dimension IP-30, 48.6mm (W) x 95mm (D) x 140mm (H)
EMC
FCC Class A, CE class A
CE/ EN61000-4-2/3/4/5/6/8
CE/ EN61000-6-2
CE/ EN61000-6-4
Safety cUL / UL 508
Stability testing
IEC60068-2-32 (Free fall)
IEC60068-2-27 (Shock)
IEC60068-2-6 (Vibration)
Table-4: Technical Specification