Mitsubishi QJ71PB92V MELSEC-Q PROFIBUS-DP Master Module DP-V1/V2

Mitsubishi Electric QJ71PB92V is a PROFIBUS-DP master module for MELSEC-Q series programmable controllers. Enables Q series PLCs to communicate with PROFIBUS-DP slave devices as a DP-Master (Class 1) in industrial automation networks. Supports PROFIBUS-DPV1 and V2 advanced functions, including acyclic slave communications, slave alarm acquisition, and slave station clock control. Maximum data transfer rate up to 12 Mbps, up to 125 slave devices per module, and up to 8192 bytes of I/O data exchange capacity. CE, UL/cUL certified, RoHS compliant.

Applications:

• Automaker assembly and welding lines connecting distributed I/O stations and robot controllers

• Petrochemical process control with smart pressure/temperature transmitters and valve positioners

• Logistics conveyor and sorting systems with variable frequency drives and barcode scanners

• Legacy system upgrades replacing older PLCs while retaining existing PROFIBUS slave networks

• Cross-brand system integration as a gateway between Mitsubishi PLCs and Siemens or Schneider Electric subsystems

Core Specifications:

• Communication protocol: PROFIBUS-DP (IEC 61158 compliant)

• PROFIBUS-DP station type: DP-Master (Class 1)

• Advanced support: DP-V1 (acyclic communication, slave alarm acquisition) / DP-V2 (slave station clock control)

• Transmission speed: 9.6 kbps … 12 Mbps (automatic baud rate detection, 12 selectable steps)

• Connectable DP-Slaves per module: up to 125 (up to 124 in redundant system)

• Input data size: max. 8192 bytes (max. 244 bytes per DP-Slave)

• Output data size: max. 8192 bytes (max. 244 bytes per DP-Slave)

• Number of occupied I/O points: 32 points (I/O assignment: Intelligent 32 points)

• Internal current consumption (5 V DC): 0.57 A

• Number of writes to flash ROM: max. 100,000 times

• Weight: 0.13 kg

• Dimensions (H × W × D): 98 mm × 27.4 mm × 90 mm

• Operating temperature: 0 °C … 55 °C

• Storage temperature: –20 °C … +75 °C

Advanced Specifications:

• Physical interface: EIA‑RS485 compliant, 9‑pin D‑sub female connector, built‑in terminating resistor switchable via software/hardware

• Transmission medium: Shielded twisted‑pair cable

• Topology: Bus topology (tree topology when repeaters are used)

• Data link method: Between DP-Master and DP-Slave: polling method / Between DP-Master and DP-Master: token passing method

• Encoding method: NRZ

• Max. number of repeaters: 3

• Connectable modules per segment: 32 (including repeaters)

• Connectable modules per network: 126 (total of DP-Masters and DP-Slaves)

• Transmission distance by baud rate: at 9.6 kbps / 19.2 kbps / 93.75 kbps: 1200 m/segment (4800 m/network with repeaters); at 187.5 kbps: 1000 m/segment (4000 m/network); at 500 kbps: 400 m/segment (1600 m/network); at 1.5 Mbps: 200 m/segment (800 m/network); at 3 Mbps / 6 Mbps / 12 Mbps: 100 m/segment (400 m/network)

• I/O data exchange methods: Automatic refresh via GX Configurator-DP settings, dedicated instructions (BBLKRD/BBLKWR), or FROM/TO instructions in sequence program

• Operating modes: Mode 0 (Compatible with QJ71PB92D function), Mode 1 (Standard PROFIBUS-DP I/O), Mode 2 (Diagnosis), Mode 3 (Enhanced function for QCPU)

• Acyclic communication (DP-V1): independent read/write access to slave parameters, alarm handling, and extended device diagnostics without affecting cyclic I/O data exchange

Standards & Compliance:
Refer to manufacturer official documentation for detailed certification and compliance information. CE compliant, UL/cUL compliant, EAC compliant. Shipping approvals: ABS, BV, DNV GL, LR, NK, RINA. RoHS compliant.

System Integration:

• This PROFIBUS-DP master module belongs to the Mitsubishi Electric MELSEC‑Q series.

• Installs into any MELSEC‑Q series main base unit (Q3□B, Q5□B, Q6□B series) or extension base unit slot.

• Compatible with Q series CPU modules (Q00J, Q00, Q01, Qn, QnH, QnPH, QnPRH, QnU series).

• Parameter settings and slave configuration performed using GX Works2 / GX Developer software together with GX Configurator-DP (version 7.0 or later).

• Slave configuration uses standard GSD files from each slave device manufacturer.

• Data consistency supported: input data up to 128 bytes, output data up to 128 bytes can be set as consistent data.

• The module automatically identifies the transmission baud rate of the network when powered up, simplifying installation.

Related Products:

• Entry level – QJ71PB93D (PROFIBUS-DP master, lower performance)

• Current model – QJ71PB92V (DP-V1/V2 advanced functions)

• Replacement for new installations – RJ71PB91V (PROFIBUS-DP master for iQ‑R series, requires GX Works3 and PROFIBUS Configuration Tool)

• Complement – GX Configurator-DP (configuration software), A6CON1E (37‑pin D‑sub screw terminal block conversion module for high‑density I/O)