ABB SYN5202-0277 3BHB006715R0277 800xA Spare parts of the system module
Brand ABB color Standard Application Industrial height 218mm rated current 200mA
Protection Level IP45 Suitable for motor power 305KW Application Site Power Industry Material Code GJR2391500R1220 Power industry HIEE401782R0001 Part Number SYN5202-0277 3BHB006715R0277
Applicable pipe 2 Whether imported is weighing 1.68 kg can be sold nationwide
ABB SYN5202-0277 3BHB006715R0277 800xA Spare parts of the system module
Half duplex means that the sending and receiving of the same media are done asynchronously.
Full duplex, by contrast, has separate transmit and receive channels.
Full-duplex links are key to scaling fast Ethernet (100Mbps). A full-duplex link network segment cannot contain more than two devices, which can be network adapters or switch ports. Note: Not a trunk hub port, the hub does not have full duplex mode. This is because the hub is part of the collision domain and it reinforces the collisions received by other ports. Full-duplex communication can be implemented when there are only two nics. Switches must be considered when there are more than two nics in full-duplex mode.
10BASE-T and 10BASE-FL have separate transmit and receive channels and can perform full duplex depending on the complexity of the network card or switch port. If the interfaces are configured in half-duplex mode, the receiving and sending synchronization detection triggers the collision detection. The same interface is set to full duplex. Because full duplex does not comply with shared CSMA/CD rules, collision detection is disabled.
The full-duplex link must be configured correctly. When the site is configured in full duplex mode, the port of the site or switching hub sends frames in a manner that ignores the CSMA/CD protocol. If the other end is set up in half-duplex mode, it will detect collisions and cause other problems, such as CRC errors, network speed decreases, and the advantages of fast Ethernet disappear.
As mentioned earlier, the network range at 100Mbps is somewhat reduced due to collisions. For twisted pair network segments and switch ports, the maximum distance of the network segment is 100 meters (within the collision domain). The problem is in the fiber port, for multi-mode fiber, the length of the network segment is 2 kilometers; For single-mode fiber, it’s 15 kilometers. In half duplex mode, the distance of the network segment is 412 meters, limited by the collision area. Therefore, it is only in full duplex mode (CSMA/CA is ignored) that the extension of the fiber network segment can reach its limit. Switch technology is recommended for fast industrial Ethernet. Full-duplex is recommended for optical fiber ports on fast Ethernet networks.
Network management is that you can make some Settings and have some control over packets and traffic.
Unmanaged is what is called silly, plug and play, no setup required. I can’t set it up. The so-called industry is a standard for its stability to reach the national industry, such as how many hours without continuous failure.
1. Disadvantages of unmanaged industrial Ethernet switches:
1, non-network management industrial Ethernet switches have limited functions, suitable for home or small networks.
2. ARP defense is not supported.
arp attacks are not viruses, so almost all antivirus software can do nothing about them; But it is better than a virus – because it can slow down communication and crash the network, and can cause information to leak.
3. mac address binding is not supported
4. vlan division is not supported
If end users connected to an unmanaged industrial Ethernet switch are in the same broadcast domain, a broadcast storm may break out and cannot be protected or suppressed. The entire network is congested, blocked, and flooded, resulting in the entire network breakdown.
5. Traffic based control is not supported
6, the reliability of data transmission is poor, and the phenomenon of packet loss is serious.
7, the assembly is single, can not be applied in large and medium-sized networks, there are big limitations to network upgrading and expansion.
8, management inconvenience, hardware failure rate is relatively large.
Two, non-network management industrial Ethernet switch advantages:
1, the price is cheap, save expenses.
2, the number of ports is dense.
3, the user is flexible.
ABB SYN5202-0277 3BHB006715R0277 800xA Spare parts of the system module
ABB 3HAC5518-1
ABB 3HAC5566-1
ABB 3HAC6157-1
ABB 3HAC6428-1/04
ABB 3HAC7344-1
ABB 3HAC7681-1
ABB 3HAC9710-1
ABB 5360673-01
ABB 57160001-KX
ABB 5SDD1060F0001
ABB 5SDF0860H0003
ABB 5SGY3545L0003
ABB 5SGY3545L0017
ABB 5SHX06F6004
ABB 5SHX1060H0003
ABB 5SHX10H6004
