Product Overview and Specifications

This is a valuable product that is no longer in production.

Communication speed: 125kbps/250kbps/500kbps/1Mbps
Communication method: Half-duplex bit serial method Total distance: Varies depending on communication speed Number of connected stations: Maximum 32 stations (Master station: 1, total of local stations and remote I/O stations: 31)
Communication cable: Shielded twisted pair cable

Maximum number of link points in MELSECNET mode 1 system: 1024 points, 128 bytes (link relay) / 1024 points, 2048 bytes (link register)
- Maximum number of links per station: 1024 bytes
Maximum number of link points in MELSECNET II mode 1 system: 4096 points, 512 bytes (link relay) / 4096 points, 8192 bytes (link register)
- Maximum number of link points per station: 1024 bytes (first half of link parameters) / 1024 bytes (second half of link parameters)
MELSECNET II mixed mode - Maximum number of link points in one system: 4096 points, 512 bytes (link relay) / 4096 points, 8192 bytes (link register)
- Maximum number of link points per station: 1024 bytes (first half of link parameters) / 1024 bytes (second half of link parameters)

Please visit the manufacturer's page for details.

Product Condition

We have confirmed that it works properly. We have checked the following:
- In a network consisting of two sets of A2USHCPU, A1SJ71AT21B, and I/O units connected with a shielded twisted pair cable, data from link devices (link memory, link register, XY) can be sent and received normally between both stations.
- Monitor the special link relay to make sure that hardware error detection is OFF and the system is operating normally.

Year of manufacture: 2007

Termination resistors are not included.
There are some light scratches here and there, but overall the condition is good.