OVERVIEW

Official designation: Mitsubishi A1SJ71E71N-B2 (MELSEC-AnS Series, Ethernet Interface Module)

Role/Application: Provides 10BASE2 Cheapernet connectivity to the MELSEC-AnS series PLC for data exchange, supporting half-duplex communication and remote monitoring within industrial control networks.

KEY SPECS SUMMARY

Power: 5 VDC 0.66 A internal consumption

Interfaces / Ports: BNC connector (10BASE2)

Indicators: Refer to the latest manufacturer manual.

Operating Temp: 0 to 55 degrees C

Platform / Compatibility: MELSEC-AnS PLC base units

Limit: 10 Mbps speed, 8 open connections

Lifecycle: Obsolete

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum segment length and node count per segment using the 10BASE2 interface?

A: The maximum segment length is 185 meters, supporting a maximum of 30 nodes per segment.

Wiring & Installation:

Q: What type of cable and connector is required for the 10BASE2 interface connection on the A1SJ71E71N-B2?

A: A coaxial cable such as RG58A/U or RG58C/U is required, connecting via a BNC connector.

Troubleshooting & Compatibility:

Q: What is the required minimum distance between connected nodes on the 10BASE2 network?

A: The minimum node to node distance required for the 10BASE2 interface is 0.5 meters.

Replacement & Upgrades:

Q: What is the status of the A1SJ71E71N-B2 module, and what is the typical replacement series for MELSEC-A?

A: The A1SJ71E71N-B2 is obsolete; the general replacement for A series modules is found within the MELSEC-Q series.