SCALANCE X-300PoE managed производства Siemens

SCALANCE X-300 products enable the establishment of switched networks both at the field level and at the control level where high data transfer rates are required in addition to high network availability and extensive diagnostics facilities. The SCALANCE X308-2M PoE switch supplies PoE-compatible devices, such as IWLAN access points SCALANCE W, IP cameras and IP telephones, with energy over the data cable. The switch is designed with IP20 degree of protection for installation in control cabinets.

The main area of application is found in high-performance plant networks with interfaces to the corporate network.

Product version

Full Gigabit switches

SCALANCE X308-2M PoE (Power over Ethernet)

• For the construction of electrical and/or optical line, ring and star topologies with
  • four integrated electrical, PoE-compatible Gigabit Ethernet Ports and two slots for any 2-port media modules (see "Media modules for SCALANCE X-300")
• Star coupler in the plant bus (redundant connection is possible)

Supply of terminal devices with PoE by means of PoE-compatible switches

• Unlimited flexibility during network expansions (e.g. more terminals) or conversion (e.g. switching from copper to fiber-optic cable) and reduction of the storage costs due to the modular construction using port modules
• Saving of additional power supply units and cabling for terminals by means of PoE voltage supply
• High availability of the network due to
  • redundant voltage feed
  • Redundant network structures based on fiber-optic or twisted pair cables (redundancy manager, standby function, and RSTP are integrated)
  • easy device replacement by means of plug-in C-PLUG swap medium
  • very fast reconfiguration of the network in event of a fault
• Lower susceptibility to failure and higher availability of the plant networking due to latching of the RJ45 FastConnect connectors in the sleeve of the RJ45 ports
• Protection of investment through integration into existing network management systems by means of standardized SNMP access
• Time saving during engineering, commissioning and in the operating phase of a plant due to the use of configuration and diagnostics integrated in STEP 7

The SCALANCE X-300 Industrial Ethernet switches with their robust metal enclosure are optimized for mounting on a standard DIN rail and the S7-300 mounting rail. Direct wall mounting in different positions is also possible. Due to the S7-300 enclosure dimensions, the devices are ideally suited for integration in an automation system using S7-300 components.

The switches have:

• 4-pin terminal block for connection of the redundant power supply (2 x 24 V DC)
• Row of LEDs for indicating status information (power, link status, data transfer, error indication, redundancy manager, standby manager)
• 2-pin terminal block for connecting the isolated signaling contact
• SELECT/SET pushbutton for on-site configuration of the signaling contact
• Slot for optional C-PLUG swap medium on the rear of the device for the easy replacement of the device in the event of a fault
• SCALANCE X308-2M PoE has four integrated electrical, PoE-compatible Ethernet ports and two slots for accommodating 2-port media modules

• Support of Power over Ethernet (PoE) according to IEEE 802.3at Type 1 (corresponds to IEEE 802.3af)
• Increase of the network performance;
  by filtering the data traffic on the basis of the Ethernet (MAC) address of the data terminals, data traffic remains local; only data intended for users of another subnetwork are forwarded by the switch.
• Simple network configuration and network expansion;
  the switch saves the data received at the ports and forwards it automatically to the destination address. The limitation of the network expansion by collision detection (CSMA/CD procedure) terminates at the port.
• Limitation of the error propagation to the affected subnetwork;
  the SCALANCE X-300 switches only forward data with a valid checksum (CRC).
• Integration of existing subnetworks with 10 Mbit/s into Fast Ethernet networks with 100 Mbit/s;
  at the twisted-pair ports, the SCALANCE X-300 switches automatically recognize the conductor pairs for transmission and reception (autocrossover), the data transfer rate of 10 or 100 or 1000 Mbit/s, as well as full-duplex and half-duplex mode (autonegotiation).
• High-performance connection of SCALANCE X-300 switches with 1 Gbit/s;
  SCALANCE X-300 PoE switches have up to eight Gigabit Ethernet ports for connecting the switches to each other or with other Gigabit-Ethernet-enabled components (e.g. SCALANCE X-400, X-500)
• Integrated redundancy manager for constructing Fast Ethernet and Gigabit Ethernet ring topologies with high-speed media redundancy.
• High-speed standby redundancy;
  several network segments such as rings can be interconnected redundantly with SCALANCE X-300 over the integrated standby function. Two X-300 switches are configured in a ring as a master and slave and are connected via two links to the other ring. The redundant link can be implemented at 1000 Mbit/s.
• Redundant interfacing to higher-level networks;
  SCALANCE X-300 switches support the standardized redundancy procedures Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP). This enables a subnetwork to be connected redundantly to a higher-level network with reduced requirements for the reconfiguration time (in the order of seconds).
• Support of virtual networks (VLAN);
  for structuring Industrial Ethernet networks with a fast growing number of users, a physically existing network can be divided into several virtual networks.
• Load limiting when multicast protocols (e.g. video transmission) are used;
  through learning the multicast sources and targets (IGMP Snooping, IGMP Querier), SCALANCE X-300 switches can also filter multicast data traffic and therefore limit the load in the network.
• Configuration of the ports for terminals that support authentication in accordance with IEEE 802.1x.
  Authentication is by means of a RADIUS server that must be configured appropriately and must be accessible via the network.
• Support of the DHCP Option 82, 66, 67 (Dynamic Host Configuration Protocol);
  this facilitates the IP address assignment of a terminal depending on the connected switch port. The IP address is assigned via a DHCP Server, which has to be configured accordingly and must be able to be reached via the network.
• Support of Access Control List (ACL);
  if this function is activated for a port, the switch only forwards message frames received at this port if their source address is listed in the address table. All connected stations can be entered automatically in the ACL.
• Syslog;
  Syslog compliant with RFC 3164 is used in the IP network for transmitting short, unencrypted text messages via UDP. This requires the use of a Syslog server that must be configured appropriately and must be accessible via the network.
• Time synchronization;
  diagnostic messages (log table entries, e-mails) are time-stamped. The local time is standardized throughout the network by means of synchronization with a SICLOCK or SNTP time transmitter, thereby simplifying the assignment of diagnostic messages to several devices.

Network topology and network configuration

The SCALANCE X-300 Industrial Ethernet switches are typically accommodated together with the nodes to be connected in one control cabinet. Electrical and optical versions can be installed together in star, line and ring topologies.

The following network structures and combinations of structures can be implemented:

• Fast Ethernet and Gigabit Ethernet rings with fast media redundancy;
  to increase network availability, as many as 50 X-200, X-300, X-400 or X-500 switches can be cascaded in line can be connected into a ring.
• Several rings can be redundantly linked through the standby function.
• At the same time, SCALANCE X-300 supports redundant connection of the ring structure to the corporate network with Rapid Spanning Tree.
• Star topology with SCALANCE X300PoE switches:
  The SCALANCE X-308-2M PoE switch represents a neutral point that can connect up to eight nodes or subnets with each other electrically or optically.

When configuring the network, it is necessary to observe the following boundary conditions:

• Maximum line length between two modules for multi-mode fiber-optic conductors:
  • 750 m at 1 Gbit/s
  • 5 km at 100 Mbit/s
• Maximum line length between two modules for single-mode fiber-optic conductors:
  • 10 to 120 km at 1 Gbit/s
  • 26 to 70 km at 100 Mbit/s
• Maximum cable length of the TP cable between two SCALANCE X switches:
  • Max. 100 m at 10/100 Mbit/s with IE FC Cable 2x2 and IE FC RJ45 Plug 180
  • Max. 100 m at 1 Gbit/s with IE FC Standard Cable 4x2 (90 m), IE FC RJ45 Modular Outlet and patch cable (10 m)
  • Max. 10 m using patches with TP Cord

Commissioning and diagnosis

Setting options on the device itself:

• Redundancy manager RM;
  to establish a ring, a SCALANCE X-300 is switched to RM mode. The Gigabit ports (electrical or optical) are preferably used as ring ports.
• Signal mask;
  the signal mask is set to the current status of the SCALANCE X-300 (setpoint) by pushbutton operation. The signal mask defines which ports and which power supplies are to be monitored. The signaling contact only reports an error when a monitored port or a monitored feeder fails (deviation of setpoint/actual status).
• IP address;
  the IP address is assigned via DHCP (Dynamic Host Configuration Protocol). If there is no corresponding server in the network, the IP address can be assigned using an enclosed software tool.

Diagnostic options on site:

• The following status information is displayed by LEDs on site:
  • Port status
  • Port mode (10/100/1000 Mbit/s, full/half-duplex)
  • Status of the two power supplies
  • Signaling contact status
  • Signal mask (setpoint status)
  • RM mode
  • Standby mode
• The status of the signaling contact is routed externally by means of floating relay contacts. This enables, for example, the module to be monitored via an input module from a controller.
• Monitoring via the Industrial Ethernet network;
  the following possibilities are available:
  • Remote via standard browser (Web-based management):
    Selection of SCALANCE X-300 switches via the network from a PC with browser
  • Remote via SNMP V1, V2c, V3:
    Secure integration of SCALANCE X-300 switches via the network into a network management system, e.g. SINEMA Server
  • Remote via PROFINET IO diagnostics:
    PROFINET diagnostic alarms from SCALANCE X-300 switches can be displayed using the relevant SIMATIC engineering tools and they can also be processed in the controller. The engineering outlay for the PLC and HMI have been drastically reduced due to the complete integration in the SIMATIC concept for system error messages.

Network management

The network management provides the following functions:

• Password-protected dial-up for "Administrator" (read and write authorization) and "User" (read only)
• Read-out of version and status information
• Setting the signal and standby mask and address information
• Fixed parameterization of the ports (data rates, half/full duplex)
• Parameterization of the VLANs and multicast services
• Parameterization of the standby connections for a redundant ring link
• Setting of Rapid Spanning Tree parameters
• Parameterization of the web management services
• Security
  • Ports can be connected or disconnected
  • Authentication in accordance with IEEE 802.1x
  • Support of Access Control List (ACL)
• Parameterization of the user administration of SNMP V1, V2c, V3:
• Output of statistics information
• Diagnosis of data traffic by means of a parameterizable mirror port with a standard commercial network analyzer
• Loading of new firmware versions or of the configuration data via the network by a TFTP server or directly via HTTP/HTTPS using a Web browser
• Saving the configuration data or log table via the network on a TFTP server

If faults occur in the network, the SCALANCE X-300 switch can independently send error messages (traps) to a network management system or also e-mails to a predefined network administrator.

Remote monitoring (RMON) provides the following functions:
The SCALANCE X-300 switches can collect statistics information according to the RMON groups 1 through 4. These include, for example, fault statistics that are kept for each port. This information can be read out through web-based management in the statistics sub-area.

To assist in selecting the right Industrial Ethernet switches as well as configuration of modular variants, the SIMATIC NET Selection Tool is available:

Online version:
http://www.siemens.com/snst

Offline version:
http://www.siemens.com/snst-download