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A1SJ71T21B

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Refurbished

$390

2 In Stock

✓  2 Year PDF Supply Warranty

The A1SJ71T21B Communication Device by Mitsubishi Electric supports a maximum of 1024 device points allocated to communication linkage per station, with 128 bytes for B devices and 2048 bytes for W devices. It operates with a current consumption of 0.65 A at 5V DC. The allowable momentary power failure time is 20 msec, ensuring stable operation even in case of brief power interruptions. Communication speeds of 125 Kbps, 250 Kbps, 500 Kbps, and 1 M bps are supported. The communication method is a half-duplex bit serial, ensuring reliable data transmission. The synchronous method employed is frame synchronous. The module utilizes a bus-type transmission path method, providing a reliable and efficient data exchange platform. The overall extension distance varies according to the communication speed selected. With a maximum of 32 connected stations, including one master station and 31 local stations, the A1SJ71T21B module offers extensive connectivity and control options. It employs the NRZI method for modulation and conforms to the HDLC (frame method) transmission format, ensuring compatibility and standard compliance. The error control system includes CRC (cyclic redundancy check) for data integrity verification, with a retry mechanism and timeout feature for enhanced reliability. The module also incorporates RAS (Remote Access Service) functions, including the host link line diagnostic capabilities. For convenient and secure connections, the module features a terminal block as the connecting terminal. It is compatible with shielded twisted wire pair cables, commonly used in industrial environments. The A1SJ71T21B module occupies 32 I/O points, providing flexibility for integration into automation systems.

Technical Specifications for A1SJ71T21B

Max. Number of Device Points per StationB: 1024 (128 bytes)
Current Consumption (5 VDC)0.65 A
Weight0.22 kg
Allowable Momentary Power Failure Time20 msec
Communication Speeds125Kbps/250Kbps/500Kbps/1 Mbps
Communication MethodHalf Duplex Bit Serial Method
Synchronous MethodFrame Synchronous Method
Transmission Path MethodBus Type
Number of Connected StationsMax. 32 units
RAS FunctionDiagnostic function such as host link line
Connecting TerminalTerminal Block
Applicable CableShielded Twisted Wire Pair Cable
Number of Occupied I/O Points32 points

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Rockwell Disclaimer: The product is used surplus. PDF Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because PDF Supply is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, PDF Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. PDF Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. PDF Supply also makes no representations as to your right to install any such firmware on the product. PDF Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.