Mitsubishi Q Series CPU Interface Module QJ71MB91

Series#: Mitsubishi

Product Details

Product Model: MITSUBISHI QJ71MB91 and QJ71MT91 – high-performance PLC CPU interface modules for MODBUS® communication.
Enables seamless master function communication with 3rd party MODBUS® compatible slave devices, ensuring broad system integration.
Supports slave mode for interaction with other MODBUS® masters, such as third-party programmable controllers, enhancing flexibility.
QJ71MB91 features a synchronization function connecting a master station via CH1 (RS-232) to multiple slaves on CH2 (RS-422/485).
QJ71MT91 allows simultaneous master and slave operation, ideal for complex networked automation scenarios.
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Specification

The MITSUBISHI QJ71MB91 and QJ71MT91 are robust PLC CPU interface modules designed for advanced MODBUS® communication in industrial automation systems. These modules excel in bridging Mitsubishi PLCs with a wide range of third-party devices, supporting both master and slave functions to optimize data exchange. The QJ71MB91 leverages a synchronization feature for efficient multi-drop networks, while the QJ71MT91 offers simultaneous master/slave operation for complex control loops. Engineered for reliability, they are ideal for manufacturing, process control, and energy management applications where seamless interoperability is critical.

Specification	QJ71MB91	QJ71MT91
Communication Protocol	MODBUS® RTU (Master/Slave)	MODBUS® RTU (Master/Slave Simultaneous)
Interface Type	CH1: RS-232 (1ch), CH2: RS-422/485 (1ch)	RS-232 (1ch), RS-422/485 (1ch)
Transmission Speed	300 bps to 115.2 kbps	300 bps to 115.2 kbps
Max. Stations Connected	32 (RS-485) / 1 (RS-232)	32 (RS-485) / 1 (RS-232)
Supported Functions	Master: Read/Write coils, registers; Slave: Respond to master requests	Master/ Slave simultaneously; Read/Write coils, registers
Synchronization Function	Yes (CH1 master to CH2 slaves)	No (independent operation)
Power Supply Voltage	5 VDC (via PLC backplane)	5 VDC (via PLC backplane)
Current Consumption	0.35 A	0.35 A
Operating Temperature	0°C to 55°C	0°C to 55°C
Storage Temperature	-25°C to 75°C	-25°C to 75°C
Relative Humidity	5% to 95% (non-condensing)	5% to 95% (non-condensing)
Vibration Resistance	5 Hz to 9 Hz: 3.5 mm, 9 Hz to 150 Hz: 1 G	5 Hz to 9 Hz: 3.5 mm, 9 Hz to 150 Hz: 1 G
Shock Resistance	15 G (peak), 11 ms half-sine	15 G (peak), 11 ms half-sine
Dimensions (W x H x D)	27.4 mm x 98 mm x 90 mm	27.4 mm x 98 mm x 90 mm
Weight	0.12 kg	0.12 kg
Standards Compliance	UL, cUL, CE	UL, cUL, CE