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 extension 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)

MELSECNET mode・Maximum number of link points for 1 system: 1024 points, 128 bytes (link relay)/1024 points, 2048 bytes (link register)
・Maximum number of link points per station: 1024 bytes

MELSECNET II mode・Maximum number of link points for 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)

MELSECNETⅡ mixed mode・Maximum number of link points in 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)

Please see the manufacturer page for details.

Product Condition

I confirmed that it works properly. We are checking the following.
- After connecting A2ACPU + AJ71AT21B and A2USHCPU + A1SJ71AT21B with a shielded twisted pair cable and configuring a network, link devices (link memory, link register, XY) can be shared normally between both stations.
- Hardware error detection is OFF (normal) by monitoring the link special relay.

Year of manufacture: 2005 Version: DB

Terminating resistor is not included.

There are some scratches and discoloration overall, but it is in relatively good condition.