Industrial Ring Switch

Transcription

1 FieldSwitch - FSR200 series April 2002 Industrial Ring Switch Switches in the FSR200 series can be connected together in a ring structure in order to achieve redundancy. The switches support super fast network topology change in case the ring gets broken or the ring structure is re-stored. Ring management is available via management software. Switches from the FSR200 series contain 8 ports and are appoved for industrial and commercial use. Both 10/100 Mbps twisted pair ports (TX) and fiber optical ports (FX) are supported. The fiber optical ports can be based on multi mode or single mode. A switch from the FSR200 series is a key component in an Ethernet solution where maimum reliability, low life cycle cost and redundancy are required. High MTBF numbers are achieved by using industrial graded components, advanced cooling techniques and no electrolytes. Deterministic Ethernet is implemented by using layer 2 (priority tagging) or layer 3 (IP ToS) priority. A switch from the FSR200 series can either be mounted on a DIN rail, or in a 19 rack.

2 2 April 2002 Product Specification Features Switches from the FSR200 series provide the following features: - 8 ports; either twisted pair (TX) or fiber optical ports (FX), i.e.: - FSR208: 8 TX. - FSR207F1: 6 TX + 1 FX. - FSR208F2: 6 TX + 2 FX. - FSR208F8: 8 FX. - TX ports: - RJ-45 connectors with auto-polarity. - Support long cable specification -185 m. - 10/100 Mbps and HDX/FDX per port. - Auto-negotiation of speed and duple per port. - Push buttons for auto-negotiation, speed and duple connectivity. - FX ports: Mbps. - Multi mode or single mode fiber transceivers. - Several fiber connectors supported (MT-RJ, LC, ST and SC). - Store-and-forward transmission at full wire speed. - Led panel indicating traffic, link, speed, duple connectivity and errors. - Two priority queues where latency sensitive real time data is put in the high priority queue if at least one of the following criteria s is fulfilled: - The packets contain high priority tags according to IEEE802.1p. - The packets are IP packets with the Type of Service (ToS) field set to high priority. Worst case switch latency for high priority data independent of switch load can be guaranteed. - Head of line blocking prevention. - Redundant ring structure support with fast network topology change in case the ring gets broken or the ring structure is restored. The time it takes to re-configure to a new network topology is lapproimatly 30 milliseconds. - Ring configuration is available via management software. - Robust and reliable design for maimum life time. E.g. no fan or moving parts, no electrolytes and full metal housing. - Fulfilling industry environmental requirements, see Environment Specification. - Wide temperature range: - [ ]Cº. - Wide DC power supply range: - [ ]VDC. - Redundant power input. - Reverse power polarity protection. - Device errors on the STAT pin on the power connector. - Enclosure: IP Mechanical dimensions: - W: 217mm, H: 88mm, D:124mm - Weight 1550gr. - DIN rail or 19 rack mounting - Low power consumption: - FSR208: typ: 8.5W, ma 10.5W. - FSR208F8: typ: 12W, ma 12.5W. FSR200 alternatives: FX fiber length [km] Fiber diameter [um] 62.5/125, 50/ /125, 50/125 9/125 9/125 Wavelength (nm) Modeconnector 850 MM-LC MM-MTRJ MM-SC MM-ST SM-MTRJ SM-SC SM-TBD SM-TBD FSR208 FSR207F1 FSR208F2 FSR208F8

3 3 April 2002 Functional Description Ethernet switching Switches from the FSR200 series perform switching based on store-and-forward. This means that the complete packet is stored before it is checked for validity. The packet is discarded if it contains bit errors (i.e. the calculated Frame Check Sequence (FCS) differ from the FCS of the packet), the packet size is smaller than the minimum Ethernet packet size (64 bytes), or the packet size is larger than the maimum Ethernet packet size + tag (1522 bytes). The destination MAC address is used for switching. A packet containing a multicast, broadcast or an unknown destination MAC address will be sent on all ports, while packets with an unicast destination MAC address will only be sent to the port where this address is learned. A MAC address is associated to a port if a packet with this address as the source MAC address is received on this port. Several addresses can be learned per port in order to handle a network with many end nodes and network elements. The switch can learn up to 3500 MAC addresses. A learned MAC address will be removed from the MAC address table if it no packets with this address as the source MAC address is received for a period of time. The aging time is 104 seconds. Led- and push button panel The led panel can operate in two modes: - Normal mode - Select port mode Normal mode The eighth port LED s will in normal mode indicate link and activity. A port led will be on (green) if the link for the respective port is up and flash if there is traffic on this port. The speed, duple and auto-negotiation LED s will all flash (red) if any errors occur. Select port mode The led panel will enter Select port mode if the Select port push button is pressed. Port LED 1 will be on (green) the first time the Select port push button is pressed, all other port LED s will be off and the speed, duple and auto-negotiation settings for this port will be shown on the corresponding LED s (red). The speed, duple and auto-negotiation LED s will flash if there are any errors related to the chosen port. The port settings for port N can be inspected by pressing the Select port push button N times. Port 1 will again be selected when the Select port push button is pressed times. The led panel will enter Normal mode when no push buttons are pressed for a period of 30 seconds. The user can change the speed, duple and autonegotiation settings for the selected port by pressing the Speed or Duple push buttons. Auto-negotiation is changed by pressing both the Speed and the Duple push buttons. New settings for the selected port is stored to non-volatile memory if the Save push button is pressed. The speed and duple connectivity for the fiber optical ports can not be changed. Deterministic Ethernet The switch contains two priority queues. A packet that is identified as a high priority packet is put in the high priority queue. The switch alternates between the two queues by using strict priority. I.e. packets from the low priority queue are only sent if the high priority queue is empty. A packet is identified as a high priority packet based on priority tagging according to IEEE 802.1p (layer 2 priority) or IP Type of Service (ToS -layer 3 priority). Layer 2 priority The IEEE 802.1p and IEEE 802.1q standards specify an etra field for the Ethernet MAC header. This field is called Tag Control Info (TCI) field, and is inserted between the source MAC address and the MAC Type/Length field of an Ethernet packet, see figure net page. This field contains a 3 bit priority field that is used for priority handling. The switch will put a tagged packet with the priority field set to four or higher in the high priority queue, while all other packets will be put in the low priority queue.

4 4 April 2002 Functional Description Destination Source Type FCS Tag Layer 3 priority Each IPv4 header contains a ToS field, see figure below. The Differentiated Services standard (Diffserv, see RFC 2474), partition the ToS field into two fields: DSCP (6 bit) and CU (2 bit). The DSCP field is used to determine the required priority. The switch is configured to put IP packets with the following ToS values in the high priority queue: (IPTOS_RELIABILITY) (IPTOS_THROUGHPUT) (IPTOS_LOWDELAY) - 0F8-0FC High priority setting of the IP ToS field of real time critical packets must be set in the IP protocol of the sending station. This can be done on TCP/UDP socket level by a setsockopt( ) command both on the client and server socket side in most Operating Systems (OS). E.g.: tos = 0FC; setsockopt(.., IP_TOS, &tos,...) MAC XXX IP Version IHL TOS Total length Time to live 12-bit 802.1Q VLAN Identifier Canonical - 1 bit 3-bit Priority Field (802.1p) Tagged frame Type Interpretation - 16 bit Identification D F M F Fragment offset Protocol Source IP address Destination IP address Options 32 bit Header checksum Head of line blocking prevention The switch supports head of line blocking prevention for low priority packets. This means that low priority packets received on any port will not be forwarded to ports that are congested. This will reduce the amount of packets in the output buffer. This function is particular useful in case of multicast traffic. High priority packets will always be forwarded. TX ports The TX ports support long cable specification. I.e. 185 m, when CAT5e or better cables are used. The pin configuration of the RJ-45 connectors is as follows: - R+ and R- on pin 1 and 2 - T+ and T- on 3 and 6 - Pin 4, 5, 7 and 8 are unused The switch contains MDX/MDIX and auto polarity that corrects reversed polarity on the transmit and receive twisted-pairs for each port. Thus, there is no need for any cross-over cables to e.g. other switches. Redundant ring Port 7 and 8 can be configured for redundant ring operation. These two ports are the connection points to the ring. One of the FSR200 switches must be defined as the root switch, while all the other FSR200 switches connected to the ring, are defined as ring members. The FSR200 switches handles fast network topology change in case the ring gets broken or the ring structure is re-stored from a bus structure. The time it takes to re-configureto a new network topology is approimatly 30 milliseconds. Ring parameter configuration is available via management software from OnTime. Switch management Ring management is available via the OnTime management software. The ring parameters can be set via this interface. Status information regarding thenetwork topology (ring or bus topology) and link information are also available. The software is designed for PC/NT and PC/Win2000. FX ports The FX ports are either based on multi mode or single mode fiber transceivers. Several fiber connectors are supported: MT-RJ, LC, ST and SC. The multi mode fiber transceivers are either based on 850 or 1300 nm wavelengths for fiber drop link lengths of 0.55 or 2.0 km respectively. Fibers with 50/125 and 62.5/125 um diameters can be used. All single mode fiber transceivers are based on 1300 nm wavelength. Fiber drop link lengths up to 40 km with a diameter of 9/125 um can be used. The FSR208F8 is only available with small form factor fiber connectors. I.e. either MT-RJ or LC. A FX port is always configured for 100 Mbps and full

5 5 April 2002 Functional Description duple connectivity. This can not be changed on push button panel. Status output The terminal marked STAT on the power connector is a status output. The STAT terminal is closed during normal operation and released (open) during a fault condition. The negative end of the STAT contact is attached to -COM. The electronic relay is capable of handling 200 ma continous load current and up to 72 VDC. Watch-dog The on board microcontroller monitors the swich functions, and is able to restart the swich in case of a fault condition. Power connector The switch is designed to operate permanently over a wide input range from 19 to 72V DC. Typical power consumption is 6W, and maimum power consumption is 8W for the FSR208, while the corresponding numbers for the FSR208F8 are 9,5W and 10W. The positive inputs are marked +VinA and +VinB, and both negative inputs are marked -COM. Power input connector is of type Phoeni MC 1,5/5-G- 3,81and is matable with a Phoeni QC 0,5/5-ST-3,81 (delivered with the switch). This connector handles wires between AWG 20 and AWG 22 ( mm2). Depending on wire areas and preffered install methods other compatible connectors are avaliable from Phoeni. The switch is equipped with two power inputs to acheive redundancy. Different voltage levels within the range could be applied to any inputs. The power supply will draw current from the input that has the highest voltage applied. This enables the possibility to feed the switch with 48V and use a 24V battery as backup, no current will be taken from the battery until the 48V input fails. Either inputs can be used if no redundancy is required. The FSR200 power implementation support 1500VDC isolation, and the power inputs have reverse polarity protection. in a 19 rack by using mounting kit A. Two units can also be mounted together side by side in order to fit in a 19 rack. This can be done by using mounting kit B. The mounting kits must be ordered separately. Support Please contact us at the following address if you have any support questions: support@ontimenet.com Eample: FSR208FN-XX-YY-ZZ-M # ports # FX ports Multi-(MM) or single mode (SM) fiber transceiver MTRJ, LC, SC or ST fiber connector Fiber drop link length Mounting kit (none, A or B) FSR208F2-MM-MTRJ-2-B I.e. 6 TX and 2 FX multi mode fiber transceivers with MTRJ connectors for fiber drop link lengths up to 2 km and mounting kit B. Installation The switch can be mounted on a DIN rail. This is the default mounting alternative. It also possible to mount a single switch on a wall, or

6 6 April 2002 Environmental specification Installation and Environmental conditions - Indoor use, or corresponding environment - Altitude up to 2000m - Operating temperature range [ ] Cº - Humidity 5-95% RHD none condensing - Enclosures: IP40 Electromagnetic compatibility (EMC) EMC direktive harmonised standards: - Immunity industrial EN Emission industrial EN Emission home/office EN Safety - Low Voltage Directive standard EN Class I equipment, in which eposed conductive parts are bonded to a connecting means for a protective conductor. - Magnetic field EN A/m - RF field disturbance EN V/m, 80% AM, MHz Mechanical - Oscillation IEC Class 1 - Shock IEC Class 1 - Enclosures IEC 529, IP 40 Climatic - Cold IEC Ad (-25Cº 16h) - Storage IEC Ad (-40Cº 16h) - Dry heat IEC Bd (+70Cº operating 16h) - Humidity IEC Db (25-55Cº 95% 6 cycles 24h) - Eye safety IEC Class 1 Test standards Immunity Conducted - Fast Transient EN AC/DC 2kV, signal 1kV - Surge immunity EN AC: 2kV/1kV, DC: 0,5kV/0,5kV, signal 1kV/- - Voltage dips/interruptions EN for AC supply - Conducted RF disturbance EN V, 80% AM, 0,15-80MHz Immunity Radiated - ESD EN /8kV