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QJ71MB91
The QJ71MB91 is a Modbus communication module in the Melsec-Q series by Mitsubishi. It facilitates various connections and supports multiple interfaces while managing efficient data communication over significant distances.
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Technical specifications for QJ71MB91
| Manufacturer | Mitsubishi |
|---|---|
| Product Line | Melsec-Q |
| Part Number | QJ71MB91 |
| Weight | 0.25 lbs (0.11 kg) |
| Module Type | Serial Modbus Communication Module |
| Number of interfaces (RS-232) | 1 channel |
| Number of interfaces (RS-422/485) | 1 channel |
| Transmission distance (RS-232) | Max. 15 meters (49.2 ft.) |
| Transmission distance (RS-422/485) | Max. 1200 meters (4592.4 ft.) |
| Master function - Number of slaves per channel | 32 (per channel) |
| Master function - Send functions | 7 functions (Automatic communication function) |
| Input area size (Automatic) | 4k words |
| Output area size (Automatic) | 4k words |
| Concurrent instructions (MBRW, MBREQ) | 1 per channel |
| Input area size (MBRW, MBREQ) | Max. 253 bytes per instruction |
| Output area size (MBRW, MBREQ) | Max. 253 bytes per instruction |
| Occupied I/O points | 32 points |
| Operating ambient temperature | 0 to 55°C |
The Mitsubishi QJ71MB91 serves as a Serial Modbus Communication Module within the Melsec-Q lineup. This compact unit is engineered to interface efficiently with diverse systems, featuring a single channel for RS-232 and another for RS-422/485. The module enables data transmission over a maximum distance of 15 meters (49.2 ft.) when using RS-232, while impressive communication capability allows for distances up to 1200 meters (4592.4 ft.) with RS-422/485.
As a master device, the QJ71MB91 can connect to up to 32 slave devices on each channel. It supports a total of seven send functions through its automatic communication feature, which simplifies management and enhances communication capabilities. The module’s automatic input and output area sizes can each accommodate up to 4k words, providing ample space for data handling. Moreover, when using MBRW and MBREQ instructions, the input and output sizes per instruction are capped at 253 bytes, allowing for precision data transactions.
This module occupies 32 I/O points and can execute one concurrent instruction through each channel. Also, the operating ambient temperature ranges from 0 to 55°C, a specification that underscores its suitability for various industrial environments. Weighing just 0.20 kilograms, the QJ71MB91 combines functionality with a compact design, making it a valuable addition to industrial automation systems.
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