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Mitsubishi Electric developed this QJ71NT11B is a MELSECNET/H network module. The twisted bus module functions as a MASTER/LOCAL device. The module consumes 0.6 amps of current at 5V DC; it can support up to 239 networks and 32 groups, each with a maximum of 32 stations. It requires 32 I/O points to be occupied and is compatible with twisted pair cables or CC-Link dedicated connections. The module is 98mm (High) x 27.4mm (Wide) x 90mm (Deep) in dimension.
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| Manufacturer | Mitsubishi |
|---|---|
| Product Type | Network module |
| Product Line | Melsec-Q |
| Part Number | QJ71NT11B |
| Weight | 2.00 lbs (0.91 kg) |
| Series | MELSECNET/H Network Module |
| Connection cable | Twisted pair cable, CC-link dedicated cable |
| Communication speed | 156 kbps to 10 Mbps |
| Communication method | Token bus |
| Synchronous method | Frame synchronous |
| Transmission path format | Bus (RS-485) |
| Maximum number of networks | 239 |
| Maximum number of groups | 32 |
| Number of stations per network | 32 stations (Control station: 1, Normal station: 31) |
| Internal current consumption | 0.6 amps (5 V DC) |
| Cable Core | 2-core (twisted pair) |
| Cable Dielectric withstand voltage V-min | 1000 V AC 1 minute (twisted pair) |
| Cable Conductor resistance | 39.4 ohm/km or less (twisted pair) |
Mitsubishi Electric manufactured the QJ71NT11B from the MELSEC-Q (QnU) sequence MELSECNET/H network module is a communication module intended for use in industrial automation systems to enable device networking and data transmission process. The module operates on a twisted bus type network, with devices daisy chained together using twisted pair wires. It supports the MASTER/LOCAL setup, which allows for centralized control as well as dispersed devices. The communication speed can be adjusted to a range of 156 kbps to 10 mbps, giving users flexibility depending on the application's needs. A token bus communication technology is used, which allows for efficient and reliable data transfer. The QJ71NT11B module also employs a frame synchronous approach to ensure that data is sent over the network in a coordinated way. It operates on an RS-485 bus transmission line. The module can support up to 239 networks and 32 groups, allowing the building of large-scale network structures. The module requires twisted pair cables for connectivity, which can be regular twisted pair cables or version 1.10 compatible CC-Link specialized cables. It operates with 32 I/O points occupied. At 5 volts of DC power, the module's internal current consumption is 0.6 amps. The module's external dimensions are 98mm (height) x 27.4mm (width) x 90mm (depth). This module can handle up to 32 stations per network, with one being a control station and the others being standard stations. This enables flexible network setups and communication between many network devices. The QJ71NT11B network module necessitates the use of 2-core twisted pair cables.