Ntron 900B Operation manual

900 Series
Industrial Ethernet
Switch
Installation
& User’s Guide

Rev050908 2

Rev050908 3
Industrial Ethernet Switch Installation Guide
900B/900N (3 Slot Enclosure and Backplane)
900B-FP (Filler Panel for empty slots)
908TX (Module)
902FX-SC (Module)
902FX-ST (Module)
902FXE-SC-YY (Module)
902FXE-ST-YY (Module)
904FX-SC (Module)
904FX-ST (Module)
904FXE-SC-YY (Module)
904FXE-ST-YY (Module)
Where: YY = -15, -40, or -80

Rev050908 4
Copyright, © N-TRON Corp., 2008
N-TRON Corp.
820 S. University Blvd., Suite 4E
Mobile, AL 36609
All rights reserved. Reproduction, adaptation, or translation without prior written permission from N-TRON
Corp. is prohibited, except as allowed under copyright laws.
Ethernet is a registered trademark of Xerox Corporation. All other product names, company names, logos
or other designations mentioned herein are trademarks of their respective owners.
The information contained in this document is subject to change without notice. N-TRON Corp. makes no
warranty of any kind with regard to this material, including, but not limited to, the implied warranties of
merchantability or fitness for a particular purpose. In no event shall N-TRON Corp. be liable for any
incidental, special, indirect or consequential damages whatsoever included but not limited to lost profits
arising out of errors or omissions in this manual or the information contained herein.
Warning
Do not perform any services on the unit unless qualified to do so.
Do not substitute unauthorized parts or make unauthorized modifications to the unit.
Do not operate the unit with the top cover removed, as this could create a shock or fire hazard.
Do not block the air vents on the sides or the top of the unit.
Do not operate the equipment in the presence of flammable gasses or fumes. Operating electrical equipment
in such an environment constitutes a definite safety hazard.

Rev050908 5
Safety Warnings
ELECTRICAL SAFETY
WARNING: Disconnect the power cable before removing the enclosure top.
WARNING: Do not operate the unit with the top cover removed.
WARNING: Do not work on equipment or cables during periods of lightning activity.
WARNING: Do not perform any services on the unit unless qualified to do so.
WARNING: Do not block the air vents.
WARNING: Observe proper DC Voltage polarity when installing power input cables. Reversing
voltage polarity can cause permanent damage to the unit and void the warranty.
LASER SAFETY (904FXE and 902FXE Only)
WARNING: CLASS 1 Laser Product. Do not stare into the Laser Beam.

Rev050908 6
900 Series Hazardous Location Installation Requirements
1. WARNING: EXPLOSION HAZARD. DO NOT DISCONNECT UNIT WHILE CIRCUIT IS LIVE,
UNLESS KNOWN TO BE NON-HAZARDOUS.
2. AVERTISEMENT: RISQUE D’EXPLOSION. NEPAS DE’BRANCHER TANT QUE LE CIRCUIT
EST SOUS TENSION, A’MOINS QU’IL S’ A GISSE D’UN EMPLACEMENT NON DANGEREUX.
3. WARNING: Install only in accordance with Local & National Codes of Authorities Having Jurisdiction.
4. Power must be supplied by an isolating source, and a 3.3A max rated UL recognized fuse must be
installed immediately before the unit.
5. Class I, Div 2 installations require that all devices connected to this product must be UL listed for the area in
which it is installed.
6. Only UL listed wiring with temperature ratings greater than 90OC permitted for Class I, Div 2 installations
operating at temperatures up to 70OC ambient.
7. Limited Operating Voltage: 12-30V for Class I, Div 2 installations.

Rev050908 7
900 Series Industrial Ethernet Switches
The 900 Series Modular Industrial Ethernet Switches support high speed layer 2 switching between ports.
The 900B and 900N enclosures contain a three slot backplane that supports up to three modules. The
908TX, 902FX and 904FX modules are the available modules. The N-TRON Corp. 900B is housed in a
ruggedized steel enclosure, and can withstand industrial temperatures, as well as extreme shock & vibration.
The 908TX is an 8 port module that is capable of auto negotiating 10/100 Mb and half/full duplex
communications. The N-TRON 908TX also supports MDIX auto sensing (for auto connector of straight
through or crossover cables) and provides 8 Category 5 compliant 10/100-BaseT connections for high
performance network design, and hub/repeater upgrades.
The 902FX is a two port 100Mb module that supports multimode fiber. ST and SC connectors are
available.
The 902FXE is a single mode (laser) version of the 902FX, and can support distances of up to 80km.
The 904FX and 904FXE are four port versions of the 902FX and 902FXE respectively.
Key Features
•Full IEEE 802.3 & 100BASE-FX Compliance
•Extended Environmental Specifications
•Support for Full/Half Duplex Operation
•LED Link/Activity Status Indication
•Auto Sensing Speed and Flow Control
•Auto MDIX (908TX only)
•Up to 4.8 Gb/s Maximum Throughput
•Industry Standard DIN-Rail Enclosure

Rev050908 8
PACKAGE CONTENTS
Please make sure the Ethernet Switch package contains the following items:
1. 900 Series Ethernet Switch
2. Installed Modules
3. This Installation Guide
Contact your carrier if any items are damaged.
INSTALLATION
Read the following warning before beginning the installation:
WARNING
The 902FXE and 904FXE unit contain a class 1 laser. Do not stare into the laser beam (fiber optic
connector) when installing or operating the product.
Never install or work on electrical equipment or cabling during periods of lightning activity.
Disconnect the power cable before removing the enclosure top.
Do not operate the unit with the top cover removed
UNPACKING
Remove all the equipment from the packaging, and store the packaging in a safe place.
File any damage claims with the carrier.

Rev050908 9
902FX/FXE & 904FX /FXE HALF DUPLEX SETUP
All 900 series fiber modules are factory configured for full duplex operation. The setting is controlled
by jumper JP1 on the backplane.
Note: Most 100Mbit fiber systems will be compatible with this Full Duplex setting. If Half Duplex
operation is desired, then follow these steps using proper wrist strap grounding techniques:
1. Remove the power & power plugs from the unit.
2. Loosen all thumbscrews & remove all modules.
3. Remove the six screws holding the backplane
4. Remove the backplane.
5. Move the jumper JP1 from position 1-2 to 3-4
6. Re-install the backplane & modules & power plugs.
902/904 Note:
Rev. C & D boards are hard wired for Port1 = HDPLX,
Rev. B & E boards are hard wired for Port1 = FDPLX.
JP1

Rev05
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Rev050908 11
MODULE CONFIGURATION SETTINGS
In order for the 900 Series modules to communicate properly the chassis must be populated with modules from
the top slot down as shown below. In addition, JP1 and JP2 jumpers (located on top side of all modules) must be
configured as indicated below.
Note: The power source must be disconnected from the 900B chassis prior to removing and inserting modules. This
unit is not hot swappable.
One Slot Configuration - When installing a single 902FX, 904FX, or
908TX module in the top slot of the 900B chassis… Configure the
module as follows:
JP1: pins 1 & 2 shorted
JP2: pins 1 & 2 shorted
Two Slot Configuration - When installing two 902FX, 904FX, and/or
908TX modules in the top two slots of the 900B chassis… Configure
both modules as follows:
JP1: pins 1 & 2 shorted
JP2: pins 3 & 4 shorted
Three Slot Configuration - When installing three 902FX, 904FX, and/or
908TX modules in all three slots of the 900B chassis… Configure all
modules as follows:
JP1: pins 3 & 4 shorted
JP2: pins 3 & 4 shorted
908TX Module - At power cycle, all LED’s flash on for approximately two seconds, and
then return to proper state. Green LED will light when Power is connected.
902FX & 904FX Modules - At power cycle, only the LED’s on the first
port flash on to indicate the reset condition, and then return to their proper
state. All other reports remain off during reset. This is normal behavior.
Green LED will light when Power is connected.
In order to verify the module jumper (JP1 & JP2) settings have been set correctly, for units which have the
N-View option turned on, you should install N-ViewOPC Server software on a PC connected to the LAN.
The software is freely distributed on the ProductCD and our web site ( http://n-tron.com/nview.zip ). Once N-
ViewOPC is installed, you should view the Ports Counter page to remotely monitor each connected port. You
may find it helpful to Copy [Alt]+[PrintScreen] the Port Counter information for each port and Paste
[Control]+[V] into a Windows document for further review. Please consult your N-View OPC Server Manual
for additional information.

Rev050908 12
908TX Module
From Left to Right:
RJ45 Ports Ports 1-8 Auto sensing 10/100BaseT Ports
Upper Left LED Port Link Status
Upper Right LED Port Activity Status
Green LED lights when Power is connected
Note: At power cycle, all LED’s flash on for approximately two seconds, and then return to proper
state.
LED’s: The table below describes the operating modes:
LED Color Description
GREEN Power is Applied
OFF Power is OFF
LNK GREEN Link between ports
established
OFF No Link between ports
ACT GREEN Data is active between
ports
OFF Data is inactive between
ports
908 Module Jumper Settings
JP1 install jumper in location 1-2 when 1 or 2 modules installed
install jumper in location 3-4 when 3 modules installed
JP2 install jumper in location 1-2 when 1 module installed
install jumper in location 3-4 when 2 or 3 modules installed

Rev050908 13
902/904 FX & FXE Module
From Left to Right:
TX Fiber Optic Transmit Port
RX Fiber Optic Receive Port
LNK Link LED (top LED) for Fiber Optic Port
ACT Activity LED (bottom LED) for Fiber Optic Port
Green LED lights when Power is connected
Note: At power cycle, only the LED’s on the first port flash on to indicate the reset condition, and then
return to their proper state. All other reports remain off during reset. This is normal behavior.
LED’s: The table below describes the operating modes:
LED Color Description
GREEN Power is Applied
OFF Power is OFF
LNK GREEN Link between ports established
OFF No Link between ports
ACT GREEN Data is active between ports
OFF Data is inactive between ports
902/904 Module Jumpers Settings
JP1 install jumper in location 1-2 when 1 or 2 modules are installed
install jumper in location 3-4 when 3 modules are installed
JP2 install jumper in location 1-2 when 1 module are installed
install jumper in location 3-4 when 2 or 3 modules are installed

Rev050908 14
APPLYING POWER
1. Unscrew the flange & Remove the DC Voltage Input Plug(s) from the side headers.
2. Install the DC Power Cables into the Plug(s) (observing polarity).
3. Tightening torque for the terminal block power plug is 0.22 Nm/0.162 Pound Foot.
4. Plug the Voltage Input Plug(s) back into the side header. All 10/100BaseT LED’s will flash ON
Momentarily. For fiber optic ports, only port 1 will flash momentarily.
5. Verify the Power LED stays ON (GREEN).
Note: Only 1 plug must be connected to power for minimal operation. For redundant power operation,
V1and V2plugs must be connected to separate DC Voltage sources. Use wire sizes 16-28 guage.
Recommended 24V DC Power Supplies, similar to
120/240VAC:
NTPS-24-3, 24VDC at 3A

Rev050908 15
N-TRON SWITCH GROUNDING TECHNIQUES
The grounding philosophy of any control system is an integral part of the design. N-Tron switches are designed
to be grounded, but the user has been given the flexibility to float the switch when required. The best noise
immunity and emissions (i.e. CE) are obtained when the N-Tron switch chassis is connected to earth ground via
a drain wire. Some N-Tron switches have metal din-rail brackets that can ground the switch if the din-rail is
grounded. In some cases, N-Tron switches with metal brackets can be supplied with optional plastic brackets if
isolation is required.
Both V- legs of the power input connector are connected to
chassis internally on the PCB. Connecting a drain wire to
earth ground from one of the V- terminal plugs as shown here
will ground the switch and the chassis. The power leads from
the power source should be limited to 3 meters or less in
length.
As an alternate, users can run a drain wire & lug from any of the Din-Rail
screws or empty PEM nuts on the enclosure. When using an unused PEM
nut to connect a ground lug via a machine screw, care should be taken to
limit the penetration of the outer skin by less than 1/4 in. Failure to do so
may cause irreversible damage to the internal components of the switch.
Note: Before applying power to the grounded switch, you must use a volt
meter to verify there is no voltage difference between the power supply’s
negative output terminal and the switch chassis grounding point.
If the use of shielded cables is required, it is generally recommended to only connect the shield at one end to
prevent ground loops and interfere with low level signals (i.e. thermocouples, RTD, etc.). Cat5e cables
manufactured to EIA-568A or 568B specifications are required for use with N-Tron Switches.
In the event all Cat5e patch cable distances are small (i.e. All Ethernet devices are located the same local
cabinet and/or referenced to the same earth ground), it is permissible to use fully shielded cables terminated to
chassis ground at both ends in systems void of low level analog signals.

Rev050908 16
RJ45 CONNECTOR CRIMP SPECIFICATIONS
Please reference the illustration below for your Cat5 cable specifications:

Rev050908 17
CONNECTING THE UNIT
For 902 & 904 FX & FXE units, remove the dust cap from the fiber optic connectors and connect the
fiber optic cables. The TX port on the 902 and/or 904 units should be connected to the RX port of the
far end station. The RX port on the 902 and/or 904 units should be connected to the TX port of the far
end station.
For 10/100 Base-TX ports, plug a Category 5 twisted pair cable into the RJ45 connector. Connect the
other end to the far end station. Verify that the LNK LED’s are ON once the connection has been
completed. For Switch to Switch or Switch to Repeater connections, since the 908TX supports the
advanced MDIX function, there is no need to use crossover cables. The 908TX will sense & adapt
accordingly.
Warning: Creating a port to port connection on the same switch (i.e. loop) is an illegal operation and
will create a broadcast storm which will crash the network!
TROUBLESHOOTING
1. Make sure the (Power LED) is ON.
2. Make sure the !(Error LED) remains OFF 3 seconds after initial power up.
3. Verify that Link LED’s are ON for connected ports.
4. Verify straight through cabling used between stations.
5. Verify cabling (pin-outs & integrity).
6. Verify that cabling is Category 5 (or higher) for 100Mbit Operation.
7. Verify TX is connected to far end RX and vise versa (902 and 904 FX/FXE only).
SUPPORT
Contact N-TRON Corp. at:
TEL: [phone]
FAX: [phone]
Website: www.n-tron.com
E-Mail: [email protected]
FCC STATEMENT
This product complies with Part 15 of the FCC-A Rules.
Operation is subject to the following conditions:
(1) This device may not cause harmful Interference
(2) This device must accept any interference received, including interference that may cause undesired
operation.

Rev050908 18
Key Specifications
Physical
Height: 3.2" (8.13 cm)
Width: 7.1" (18.03 cm)
Depth: 4.1" (10.41 cm)
Weight: ~3.0 lbs (2.3 kg)
(Note: This unit may be mounted horizontally or vertically)
Electrical
Input Voltage: 10-30 VDC (Regulated)
Input Current: 390 mA @ 24VDC (Steady State)
Input Ripple: Less than 100 mV
Inrush Current: 13.7 Amp / 1.9 ms @ 24VDC with (3) 908TX modules
Inrush Current: 13.9 Amp / 1.9 ms @ 24VDC with (3) 904FX modules
Environmental
Operating Temperature: 20oC to 70oC (-4°F to 158oF)
Storage Temperature: -20oC to 85oC (0°F to 185oF)
Operating Humidity: 10% to 90%
(Non-Condensing)
Operating Altitude: 0 to 10,000 ft.
Shock and Vibration (Bulkhead Mounting)
Shock: 200g @ 10ms
Vibration: 1g, 10-500Hz, 3 axis
Seismic: 20g, 5-200Hz, 15s
Reliability
MTBF: >1M Hours (measured)
Network Media
10BaseT: > Cat-3 Cable
100BaseT: > Cat-5 Cable
100BaseFX: Multimode: 50-62.5/125µm Fiber
Singlemode: 7-10/125µm Fiber
Fiber Transceiver Characteristics
Fiber Length: 2km* 15km** 40km** 80km**
TX Power Min/Max -19dBm/-14dBm -15dBm/-7dBm -5dBm/0dBm -5dBm/0dBm
RX Sensitivity Max: -32dBm -34dBm -34dBm -34dBm
Wavelength: 1310nm 1310nm 1310nm 1550nm
*=Multimode ** =Singlemode
Recommended Wiring Clearance:
Front: 2" (5.08 cm)
Side: 1" (2.54 cm)

Rev050908 19
Regulatory Approvals:
Safety: Listed as UL 1604 (US and Canada) Hazardous Locations, Class I, Zone 2, Group IIC, T4A
EMI: EN50081-1:1992, EN55022 – Class A
FCC Part 15 Class A
EMS: EN55024:1998
EN61000-4-2:1995
EN61000-4-3:1995
EN61000-4-4:1995
EN61000-4-5:1995
EN61000-4-6:1995
Note: Shielded cables must be used to meet emission standards
GOST-R Certified.
.

Rev050908 20
Ordering Information
PN Description
900B Industrial Ethernet switch chassis with 3 slots for optional expansion modules
900-RM 19" Rack Mount Kit
900-PM Panel Mount Kit
908TX Eight ports 10/100BaseTX (RJ45)
902FX-XX Two ports 100BaseFX multimode fiber
902FXE-XX-YY Two ports 100BaseFX singlemode fiber
904FX-XX Four ports 100BaseFX multimode fiber
904FXE-XX-YY Four ports 100BaseFX singlemode fiber
Where "XX" is: ST for ST style fiber connector
SC for SC style fiber connector
Where "YY" is: 15 for 15km max. fiber segment length
40 for 40km max. fiber segment length
80 for 80km max. fiber segment length
Warranty: Effective January 1, 2008, all N-TRON products carry a 3 year limited warranty from the date of purchase.
Contact/Support Information
N-TRON Corp.
820 S. University Blvd., Suite 4E
Mobile, AL 36609
TEL [phone]
FAX [phone]
Website: www.n-tron.com
E-Mail: [email protected]