ontime 100 Series User manual

OnTime Industrial Ethernet
100 Series
V 1.0
- 1 -
OnTime Industrial Networks
100 Series Installation Guide

OnTime Industrial Ethernet
100 Series
V 1.0
- 2 -
Index
1. Introduction To OnTime Networks
1.1. History Of Ethernet
1.2. Industrial Ethernet Market
1.3. Switches vs. Hubs
1.3.1. Switch Operation. MAC Address Learning
1.4. Twisted Pair Port Specification
1.4.1. MDX/MDIX Technology, Crossed / Straight Cables
1.4.2. Auto-Negotiation Protocol & Manual Configuration
1.5. Fibre Optic Port Specification
1.5.1. Fibre Optic Care
2. Switch Specifications
2.1. Power Supply Specification
2.2. Power Supply Connections
3. Technical Specification
3.1. Returns Procedure
3.2. Physical Specification

OnTime Industrial Ethernet
100 Series
V 1.0
- 3 -
Section 1
Introduction to OnTime
Company History
OnTime is dedicated to the implementation of industrial and deterministic Ethernet
infrastructure. OnTime Networks is a privately held company based in Norway and Sweden.
We work closely with a number of large automation companies; enhancing older proprietary
networks and working in partnership developing new network technology.
Mission Statement
OnTime's mission is to provide an extension of Ethernet to the factory floor by offering
Ethernet products that fulfill industrial and real time requirements.
Core Technology
OnTime's Ethernet switches are based on a robust and reliable industrial design for maximum
life cycle and minimum life time costs. Real time properties are implemented in order to
achieve determinism for real time critical applications.

OnTime Industrial Ethernet
100 Series
V 1.0
- 4 -
Section 1.1
History of Ethernet
In late 1972, Metcalfe and his Xerox PARC colleagues developed the first experimental
Ethernet system to interconnect the Xerox Alto, a personal workstation with a graphical user
interface. The experimental Ethernet network was used to link Altos to each other, and to
servers and laser printers.
The signal clock for the experimental Ethernet interface was derived from the Alto's system
clock, which resulted in a data transmission rate on the experimental Ethernet of 2.94 Mbps.
Robert Metcalfe's first experimental network was called the Alto Aloha Network.
In 1973, Robert Metcalfe changed the name to "Ethernet," to make it clear that the system
could support any type of computer; not just the Xerox Altos and to point out that his new
network mechanisms had evolved well beyond the Aloha system. He chose to base the name
on the word "ether" as a way of describing an essential feature of the system: the physical
medium (i.e., a cable) carries bits to all stations, much the same way that the old "luminiferous
ether" was once thought to propagate electromagnetic waves through space. Thus, Ethernet
was born.”
``The diagram ... was drawn by Dr. Robert M. Metcalfe in 1976 to present Ethernet ... to the
National Computer Conference in June of that year. On the drawing are the original terms for
describing Ethernet. Since then other terms have come into usage among Ethernet
enthusiasts.''

OnTime Industrial Ethernet
100 Series
V 1.0
- 5 -
Section 1.2
Industrial Ethernet – What Are The Differences?
Within the UK Market, and possibly the majority of Europe, Ethernet is moving into the
Automation Industry. Manufacturers are exporting their legacy protocols onto Ethernet,
designing new IP based communication protocols and providing embedded Web-Pages
within PLCs to provide real-time information using simple tools like Internet Explorer and
Netscape.
However, the domain of Ethernet has always been controlled by the IT department who
configured office networks normally with an iron fist and dictated to the company how the
network would be designed with complex recovery protocols like spanning tree and SNMP to
help with fault finding and system analysis. If a network failure occurred the IT department
would casually look at repairing the equipment - there was no real rush as it was an office
network. However, with Industrial Ethernet you need very fast repair time, and, with an IT
department not present on the factory floor the maintenance personnel need to be made
aware of the fault, find the error and repair it - quickly.
Industrial rated Switches are intended to be installed in harsh conditions and electrical
environments with the added benefit of fast recovery of a network failure. The On-Time
switches are an excellent example of how such Switches should be designed – very high
operating temperatures, fast repair of redundant ring, layer 2 and layer 3 priority switching etc.
Without doubt, On-Time switches are technically superior to many similar models available on
the market.

OnTime Industrial Ethernet
100 Series
V 1.0
- 6 -
Section 1.3
Switches vs. Hubs
A hub consists of a number of ports normally with either RJ-45 (copper) sockets and / or fibre
optic ports that have a number of different styles of fibre optic sockets. Usually a ‘patch cable’
is connected to the hub; the other end is normally connected to a device (PC, Printer etc).
Note: It should be noted that when a hub requires an ‘up-link’ connection to a further
hub a cross-over style cable is required.
A hub has no intelligence and therefore is unable to identify addresses or any information
contained within the Header frame of an Ethernet packet. This means that it is not capable of
determining which port to send the frame to. Therefore, every frame is sent to every port.
Note: Industrial hubs can only connect to equipment that operates at the same speed.
A network of repeaters and hubs is called a ‘Shared Ethernet’ or ‘Collision Domain’. Various
systems will all compete with each other using ‘Carrier Sense Multiple Access / Collision
Detect’ (CSMA/CD) protocol. This means that only one system is allowed to proceed with
a transmission of a frame within a Collision Domain at any one time. This is a major
disadvantage when using Hubs and Repeaters within a network.
If a hub sees a collision on a cable segment, it is detected and a ‘jam’ signal is generated.
The ‘jam’ signal is sent to all connected devices. This ensures that every device is aware of
the collision and they do not attempt to transmit during the collision.
All Ports Receive the Same Ethernet Frame
To summarise, hubs operate with the following limitations:
•Only a single speed of operation – no ability to automatically change between 10M or
100M.
•Only one system is allowed to proceed with a transmission of a frame within a
Collision Domain at any one time.
•Hubs require special ‘crossed’ cables to enables links from Hub to Hub. (If no up-link
port is present)

OnTime Industrial Ethernet
100 Series
V 1.0
- 7 -
Section 1.3.1
Switch Operation
Introduction
A switch has to forward and receive packets from one LAN or device to another. The switch
could forward all packets, but if this was the case it would have similar behavior to a hub.
It would be more intelligent if the switch only forwarded packets which need to travel from one
LAN or device to another. To do this, the switch must learn which devices or LANs are
connected to each port. In simplistic terms; it needs to learn the destination and source ports
of each and every packet received on each individual Switch port. Once learnt, any identically
addressed packet will be automatically be forwarded.
Error Detection
The switch stores every incoming packet and scans this for errors, usually by checking the
frame CRC (cyclic redundancy check sum). If any errors are found or detected the packet is
discarded. In addition each frame is checked for size. Undersized packets (less than 64
Bytes) and oversized packets (more than 1518 bytes)*are also discarded.
Once these basic checks have been carried out the switch can then start learning packet
source and destination information.
Note: When implementing Packet Priority this increases to 1522 or 1536 Bytes.
Flooding
The switch needs to make a decision regarding which port(s) the packet is to be forwarded to.
This decision is based upon the MAC tables that are maintained and updated automatically
by the Switch. The process is known as Layer 2 Switching.
When first powered on the MAC tables within the Switch are empty. When a packet is
received on a port the Switch does not know where the destination MAC address is located.
The Switch learns the address by ‘flooding’ the packet out to all ports. Eventually, the
destination node responds, the address is located and the Switch remembers the destination
port. In simplistic terms; when a Switch receives a packet on a port it stores the source MAC
address in the MAC table that corresponds to that Port. The flooding technique is always
used with Broadcast and Multicast packets. If the switch is equipped with multicast
management then multicast packets will not be flooded.

OnTime Industrial Ethernet
100 Series
V 1.0
- 8 -
Section 1.3.1
Switch Operation (Cont..)
MAC Table
A MAC table can hold up to 8000 entries; and with a total packet memory of over 1MB this is
adequate for normal networks. Naturally, devices will be disconnected from Ports during the
life of a network. If the MAC table did not automatically monitor for idle nodes the table would
become full. If a node has been idle for more than a few seconds the source and destination
information for that node will be deleted from the table. This is commonly known as the ‘age
time’. To reset the table power cycle the Switch.MAC table size is normally always large
enough for industrial networks. Packet memory size on the other hand can affect performance
and ability to handle short high load/overload situations when an event occurs in a control
network or similar industrial network.

OnTime Industrial Ethernet
100 Series
V 1.0
- 9 -
Section 1.3.1
Switch Operation (Cont..)
Full Wire Speed
The Switch supports full wire speed. This equates to 100Mbit/s full duplex on every port. In
detail 100Mbit/s in each direction on all ports equals 200Mbit/s per port.

OnTime Industrial Ethernet
100 Series
V 1.0
- 10 -
Section 1.4
Twisted Pair Port Specification
Introduction
The 200 Series Switch is available with up to eight copper ports. The copper ports support the
long cable specification that enables standard CAT5e copper cables to run up to 150 Meters
when used with devices that also support this specification. This highlights the enhanced
design specification the switch employs when used in noisy electrical environments.
In industrial networks long cables should be avoided but equipment specified
according to long cable specification gives more margins for disturbances.
MDX/MDIX
There are two types of copper Ethernet ports available; MDI (Medium Dependant Interface)
and MDIX (Medium Dependant Interface Crossover). The MDI port types are associated with
copper interfaces available on NICs (Network Interface Cards), PLCs, VSDs and DCSs etc.
The latter type of interface (MDIX) is found on Hubs or Switches.
In addition there are two types of Ethernet cable available. These are referred to as a ‘straight
through cable’ or ‘crossed cable’.
STRAIGHT CONNECTION –Switch-PLC, Hub-PLC, Switch-NIC etc.
Connector A Connector B
Pair 1 pin 4 <-------> Pin 4
pin 5 <-------> Pin 5
Pair 2 TD + pin 3 <-------> Pin 3 TD +
TD - pin 6 <-------> Pin 6 TD -
Pair 3 RD + pin 1 <-------> Pin 1 RD +
RD - pin 2 <-------> Pin 2 RD -
Pair 4 pin 7 <-------> Pin 7
pin 8 <-------> Pin 8
CROSSED CONNECTION – Switch-Switch, Hub-Hub, Switch-Hub etc.
Connector A Connector B
Pair 1 pin 4 <-------> Pin 7
pin 5 <-------> Pin 8
Pair 2 TD + pin 3 <-------> Pin 1 RD +
TD - pin 6 <-------> Pin 2 RD -
Pair 3 RD + pin 1 <-------> Pin 3 TD +
RD - pin 2 <-------> Pin 6 TD -
Pair 4 pin 7 <-------> Pin 4
pin 8 <-------> Pin 5

OnTime Industrial Ethernet
100 Series
V 1.0
- 11 -
Section 1.4 (Cont)
Twisted Pair Port Specification
Auto MDX/MDIX
The complete range of OnTime Switches automatically detects the transmit and receive
copper pairs used in a patch cable. This eliminates the need to source the two types of patch
cable (crossed and straight through) highlighted above and therefore reduces the cost of
carrying two types of spares. This feature cannot be deactivated.
Electrical Isolation
The copper (TX) ports incorporate high electrical isolation between the signal lines and the
internal electronics. In addition, the switch can also withstand over 500 Amps through the
shield for short periods of time (20-30mS) without effecting the operation and communication
of the Switch. However, this is not advisable. Fibre optical cables should be used in such
environments. Each TX port is isolated to chassis and other ports. Isolation is rated 1500Vrms
(1 minute).
Auto-Negotiation
Auto-Negotiation is a protocol that controls the speed and duplex of a copper cable when a
connection is established between two Ethernet devices. Auto-Negotiation detects the various
modes that exist in the device on the other end of the cable and highlights its own abilities to
automatically configure itself. Therefore, it will automatically operate at the highest
performance in relation to speed and duplex. This allows simple and automatic connection of
devices that support a variety of modes from a variety of manufacturers. The auto-negotiation
protocol only functions on copper ports.
As standard the range of OnTime Switches are shipped with the Auto-Negotiation feature
enabled. However, if required a manual configuration process is possible using the
push buttons. These are located on the front panel of the Switch.

OnTime Industrial Ethernet
100 Series
V 1.0
- 12 -
Section 1.4 (Cont)
Twisted Pair Port Specification
Manual Configuration
The front panel LEDs provides indication on the Status of each port. In addition, each port can
be manually configured for speed, duplex and auto-negotiation using the push button panel
located on the front of the Switch.
Normal Indication Mode
When the unit is first powered on the Switch front panel will operate in normal mode. In this
condition the port LED will indicate link and traffic status.
Select Port Mode
The front panel will enter Select Port Mode when the Select Port button is pressed. Pressing
the Select Port button once will illuminate Port 1 LED – manual control of this port is now
available. Pressing the Select Port button a second time will illuminate Port 2 LED – manual
control of this port is now available. Each additional port can be placed into Manual mode by
subsequent pressing of the Select Port button.
If no buttons are pressed for 30 seconds the unit will return to Normal Mode.
Speed Button
Pressing the Speed Button once selects 10M, twice enables 100M and three enables auto-
negotiation mode.
Duplex Button
Pressing the Duplex Button changes the Port duplex mode from full duplex to half duplex or
vice versa.
Save Button
Newly configured settings are stored in non-volatile memory when the Save Button is
pressed.
Note: Manual configuration of fibre ports is not possible.

OnTime Industrial Ethernet
100 Series
V 1.0
- 13 -
Section 1.5
Fibre Optic Port Specification
Fibre Optic Communications
The fibre optic (FX) ports are available with either multi-mode or single mode fibre
transceivers. Multi-mode transceivers are available with MTRJ, SC or ST style connectors.
Single mode transceivers are only available with LC style connectors.
Transceiver Type Light Wavelength Fibre Diameter Maximum Distance
Multi Mode 2KM 1300 nM 50/125 uM or
62.5/125uM 3 KM
Single Mode 15KM 1300 nM 9/125 uM 15 KM
Note: The fibre distance specified must take into account loss budgets as detailed below.

OnTime Industrial Ethernet
100 Series
V 1.0
- 14 -
Section 1.5
Fibre Optic Port Specification (Cont..)
Fibre Optic Power Budgets
Single Mode Transceiver
SINGLE MODE
(xx/125) MTRJ 15km[dBm]
Max. Receive Power -8
Min. Receive Power -31
Max. Optical Power -14
Min. Optical Power -20
Multi Mode Transceiver
MULTI MODE
(50/125) MTRJ [dBm]
Max. Receive Power -14
Min. Receive Power -31
Max. Optical Power -14
Min. Optical Power -23,4
MULTI MODE
(62.5/125) MTRJ [dBm]
Max. Receive Power -14
Min. Receive Power -31
Max. Optical Power -14
Min. Optical Power -20
Note: Fibre Ports are always configured for 100 Mbit/s and full duplex.

OnTime Industrial Ethernet
100 Series
V 1.0
- 15 -
Section 1.5.1
Fibre Optic Port Specification (Cont..)
Fibre Optic Care
Fibre optic transmission medium is usually made of Glass. In addition, the diameter of the
fibre can be as low as 9um. In comparison, the diameter of an average piece of Human hair is
40 um.
Therefore, a small piece of dust or contaminate located on the end of a patch cable
could easily disrupt communications.
The fibre optic transceivers and associated patch cables must be treated with great care.
Therefore, the following rules should be adhered to during any commissioning work and fibre
optic installation.
•Dust caps must be replaced immediately after removal of patch cable from
transceiver or patch box. Failure to comply could result in damage to transceivers or
patch cables.
•Keep hands clean when touching fibre optic cable.
•Patch cables should be cleaned with IPA and dried with a lint-free cloth before
installation.
•Once patch cables have been installed dust will not ingress the transceiver
NOTE: Permanent damage to both fibre patch cords and fiber optic transceiver
components may be the result of just a small invisible piece of dust!

OnTime Industrial Ethernet
100 Series
V 1.0
- 16 -
Section 2.0
Switch Specifications
Power Supply Connector
The switch is designed to operate permanently over a very wide range of power (19 V DC to
72 V DC). Two redundant inputs are provided to provide enhanced redundancy if either
supply fails.
The power supply draws power from the input that has the highest potential difference when
compared to the alternate supply.
This enables use of a 48V source as primary supply with a 24VDC battery as back up.
Power supply inputs have reverse polarity protection.

OnTime Industrial Ethernet
100 Series
V 1.0
- 17 -
Section 3.0
Switch Technical Specification
Interface Specifications
RJ-45 Ports 10/100 BaseT(x)
Auto Negotiation Feature
Speed
Full and Half Duplex mode
Auto MDI/MDI-X
Manual Negotiation
Speed
Full and Half Duplex mode
Fibre Ports 100BaseFX Ports
Fibre Specifications
Distances Multi mode 2-3KM
Single mode 15KM
Wavelength 1300nM
Power Specification
Input Voltage 19VDC..72VDC
Input Current (@24VDC) Typical 3 Watts
Inrush Current Not Greater Than Input Current.
Maximum Current
Maximum 5Watts
(Model Dependant)

OnTime Industrial Ethernet
100 Series
V 1.0
- 18 -
Section 5.0
Switch Technical Specification
Environmental Specification
Indoor use or corresponding environment
Altitude up to 2000M
Operating temperature (-40 .. +70°C)
Humidity 5-95’C RHD Non Condensing
Enclosure IP40
Climatic
Cold IEC 68-2-1 Ad (-25 ‘C operational 16 Hours)
Storage IEC 68-2-1 Ad (-40 ’C 16 Hours)
Dry Heat IEC 68-2-2 Bd (+70 ’C operational 16 Hours)
Humidity IEC 68-2-30 Db (25 ‘C .. 55 ‘C 95% 6 Cycles 24 Hours)
Mechanical
Oscillation IEC 255-21-1 Class 1
Shock IEC 255-21-2 Class 1
Enclosures IEC 529, IP 40
Electromagnetic Compatibility (EMC)
Industrial Immunity EN 61000-6-2
Industrial Emission EN 50081-2
Home / Office Emission EN 50081-1
Radiated Immunity
ESD EN 61000-4-2 (4/8 kV)
Magnetic Field EN 61000-4-8 (30A/m)
RF Field Disturbance EN 61000-4-3
10 V/m 80% AM
80 .. 1000MHz

OnTime Industrial Ethernet
100 Series
V 1.0
- 19 -
Section 5.0
Switch Technical Specification
Test Standards
Conducted Immunity
Fast Transients EN 6100-4-4
AC/DC 2kV, Signal 1kV
Surge Immunity EN 6100-4-5
AC:2kV/1kV
DC: 0.5kV/0.5kV
Signal 1kV/-
Voltage Dips
Voltage Interruptions EN 6100-4-11 for AC Supply
Conduced RF
Disturbance EN 6100-4-6
10V, 80% AM, 0, 15-80 MHz
Radiated Immunity
ESD EN 61000-4-2 (4/8 kV)
Magnetic Field EN 61000-4-8 (30A/m)
RF Field Disturbance EN 61000-4-3
10 V/m 80% AM
80 .. 1000MHz
Safety
Low Voltage
Directive Standard EN 60950
Class 1 equipment, in which exposed conductive parts are bonded to a connecting
means for a protective conductor.
Eye Safety IEC 825-1 Class 1

OnTime Industrial Ethernet
100 Series
V 1.0
- 20 -
Section 5.1
Switch Technical Specification
Returns Procedure
Contact your equipment supplier before returning any equipment.
Equipment will not be accepted without an allocated returns number.