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QJ71C24 Mitsubishi MELSEC-Q Series Serial communication
Discontinued by Mitsubishi Electric (Factory Automation) — we can still source the original QJ71C24 (new, used or refurbished, subject to availability). Request a quote below.
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Quick facts
| Availability | Confirmed on request |
| Category | Mitsubishi MELSEC-Q Series – Information/network |
| Lifecycle | Discontinued |
| Warranty | 12-month (new) · 3-month (used/refurbished) |
Shipping & availability
Can I still buy the QJ71C24 now that it is discontinued?
Yes. Mitsubishi Electric (Factory Automation) has discontinued the QJ71C24, but sourcing discontinued parts is what PartnerPLC specialises in — new old stock, used and refurbished units. Request a quote and we'll confirm availability, condition and lead time.
When can QJ71C24 be shipped?
QJ71C24 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.
Can I pick up QJ71C24 in person?
Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.
Is express delivery available?
Yes — mention it when you request a quote for QJ71C24 and we'll include express shipping options in our reply.
My factory is down and I need this urgently — can you help?
For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for QJ71C24, subject to availability and destination.
The Mitsubishi Electric QJ71C24 is a serial communication in the MELSEC-Q Series. RS-232: 1 channel, RS-422/485: 1 channel, transmission speed: 115.2 kbps with 2 channels. Mitsubishi Electric has discontinued it (2004/01 Discontinued); PartnerPLC sources discontinued Mitsubishi parts on the surplus market for maintenance of existing machines. Specifications and manuals below are Mitsubishi Electric's own data.
Specifications
Product
| Series | MELSEC-Q Series |
| Category | Serial communication |
| Type | RS-232/422/485 |
| Sales status | 2004/01 Discontinued (Mitsubishi Electric) |
| Outline | RS-232: 1 channel, RS-422/485: 1 channel, transmission speed: 115.2 kbps with 2 channels |
Specifications
| Interface: CH1 | RS-232-compliance (D-sub 9 pin) |
| Interface: CH2 | RS-422/485-compliance (2-piece terminal block) |
| Communication method: Line | Full-duplex/half-duplex communications |
| Communication method: MC protocol communication | Half-duplex communications |
| Communication method: Nonprocedural protocol communication | Full-duplex/half-duplex communications |
| Communication method: Bidirectional protocol communication | Full-duplex/half-duplex communications |
| Synchronization method | Start-stop synchronization method |
| Transmission speed | 50, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200 bps • Total transmission speed of two interfaces is available up to 115200 bps. |
| Transmission distance: RS-232 | Maximum 15 m |
| Transmission distance: RS-422/485 | Maximum 1200 m (overall distance) |
| Data format: Start bits | 1 |
| Data format: Data bits | 7/8 |
| Data format: Parity bits | 1 (vertical parity) or none |
| Data format: Stop bits | 1/2 |
| Access cycle: MC protocol communication | Processes one request during the END processing of the CPU module of the station. Number of scans that must be processed/number of link scans depends on the contents of the request. |
| Access cycle: Nonprocedural protocol communication | Sends each time a send request is issued. Can receive at any time. |
| Access cycle: Bidirectional protocol communication | Sends each time a send request is issued. Can receive at any time. |
| Error detection: Parity check | Selected for all protocols and when this check is enabled, ODD or EVEN is selected by a parameter. |
| Error detection: Sum check code | For the MC or bidirectional protocol, selected by a parameter. For the nonprocedural protocol, selected in the user frame. |
| Transmission control: RS-232: DTR/DSR control | Enabled |
| Transmission control: RS-232: RS/CS control | Enabled |
| Transmission control: RS-232: CD (DCD) signal control | Enabled |
| Transmission control: RS-232: DC1/DC3 (Xon/Xoff) control | Enabled |
| Transmission control: RS-232: DC2/DC4 control | Enabled |
| Transmission control: RS-422/485: DTR/DSR control | Disabled |
| Transmission control: RS-422/485: RS/CS control | Disabled |
| Transmission control: RS-422/485: CD (DCD) signal control | Disabled |
| Transmission control: RS-422/485: DC1/DC3 (Xon/Xoff) control | Enabled |
| Transmission control: RS-422/485: DC2/DC4 control | Enabled |
| Line configuration for connection (Target device side : CPU module side): RS-232 | 1:1 |
| Line configuration for connection (Target device side : CPU module side): RS-422/485 | 1:1，1:n，n:1，m:n (The total number of 'n' or 'm+n' is up to 32.) |
| Line configuration for data communication (Target device side : CPU module side): RS-232: MC protocol communication | 1:1 |
| Line configuration for data communication (Target device side : CPU module side): RS-232: Nonprocedural protocol communication | 1:1 |
| Line configuration for data communication (Target device side : CPU module side): RS-232: Bidirectional protocol communication | 1:1 |
| Line configuration for data communication (Target device side : CPU module side): RS-422/485: MC protocol communication | 1:1，1:n，m:n (The total number of 'n' or 'm+n' is up to 32.) |
| Line configuration for data communication (Target device side : CPU module side): RS-422/485: Nonprocedural protocol communication | 1:1, 1:n, n:1 (The total number of 'n' is up to 32.) |
| Line configuration for data communication (Target device side : CPU module side): RS-422/485: Bidirectional protocol communication | 1:1 |
| Number of occupied I/O points | 32 points (I/O assignment: Intelligent 32 points) |
| Internal current consumption (5 V DC) | 0.31 A |
| External dimensions: Height | 98 mm |
| External dimensions: Width | 27.4 mm |
| External dimensions: Depth | 90 mm |
| Weight | 0.20 kg |
Specifications
| General specifications | Refer to the general specifications of the CPU module. |
Downloads & documentation
Official documents from Mitsubishi Electric (Factory Automation), downloaded directly from the manufacturer.
Data sheets & manuals
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