Q: What serial interfaces does the QJ71C24 provide?
A: One RS‑232 channel and one RS‑422/485 channel.
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Mitsubishi
QJ71C24
QJ71C24 Serial Communication Module, RS‑232/RS‑422/485, 2 channels
Mitsubishi
From $507.25In stockDiscontinued
Product Description
The QJ71C24 is a serial communication module for MELSEC‑Q Series PLCs, providing one RS‑232 channel and one RS‑422/485 channel for integration with serial devices and legacy equipment. It supports a maximum transmission speed of 115.2 kbps across both channels, enabling reliable data exchange for HMIs, barcode readers, drives, and other serial peripherals. Designed for industrial environments, the module meets multiple international conformity standards, making it suitable for global deployments. Engineers can leverage the dual‑port configuration to segregate device types or protocols while maintaining compact system architecture within the Q‑series backplane. Typical applications include production line interfaces, equipment diagnostics, and supervisory communication where deterministic serial links are required. The QJ71C24 has been discontinued, with QJ71C24N listed as a replacement; however, it remains widely supported in the field for maintenance of existing installations. Module includes the communication interface hardware; cables and accessories are sold separately.
Key Features
- •RS‑232 and RS‑422/485 dual channels
- •Up to 115.2 kbps transmission speed
- •MELSEC‑Q Series PLC compatible
- •Global conformity approvals listed
- •Compact module for backplane installation
- •Suitable for legacy device integration
Buy Options
Condition, indicative price, stock, and lead time. Confirm current availability via RFQ.
ConditionPriceAvailabilityLead time
New
Price: RFQ
Availability: Sourced on request
Lead time: Quoted after RFQ
Never Used
Price: $558.58
Availability: 9 in stock
Lead time: Quoted after RFQ
Used
Price: $507.25
Availability: 12 in stock
Lead time: Quoted after RFQ
FNFP
Price: RFQ
Availability: Sourced on request
Lead time: Quoted after RFQ
Specifications
- Model number
- QJ71C24
- Channels
- RS‑232: 1, RS‑422/485: 1
- Max transmission speed
- 115.2 kbps
- Series
- MELSEC‑Q
- Conformance standards
- UL, cUL, CE (EMC), LR, NK, DNV, ABS, RINA, BV
- Sales status
- Discontinued
- Discontinued date
- 2004-01
- Replacement model
- QJ71C24N
- Brand
- Mitsubishi Electric
- Part #
- QJ71C24
- Category
- PLCs/Machine Control
- Subcategory
- PLC Module/Rack
- Weight
- 0.44 lbs
Before we quote this part
Actual photos when available
Nameplate, condition, and visible wear can be shared before quote when stock photos are not enough.
Test notes for used units
Power-on or function test status is stated when available, with clear condition grading.
Trackable global shipping
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Clear DOA boundary
For tested units, quote terms can include 7-day DOA support unless otherwise stated.
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FAQ
Q: What is the maximum communication speed?
A: Up to 115.2 kbps across the two channels.
Q: Which PLC series is this module compatible with?
A: Mitsubishi MELSEC‑Q Series.
Q: Is the QJ71C24 still in production?
A: No, it is discontinued; the replacement is QJ71C24N.
Q: What certifications does it have?
A: UL, cUL, CE (EMC), and various marine classifications as listed.