Manufacturer: Mitsubishi Electric
Product No.: QJ71GP21S-SX
Country of origin:United States
Product Type: PLC Communication Modules
Payment: T/T, Western Union
Weight: 1300g
Shipping port: Xiamen
Warranty: 12 months
To establish deterministic, high-speed backbone communications within a MELSEC Q Series control architecture, the Mitsubishi Electric QJ71GP21S-SX CC-Link IE Controller Network Unit serves as a high-performance fiber-optic interface. Operating on a gigabit transmission line, this module coordinates high-volume data exchanges using a token ring method across a dual-loop path topology. Designed with a dedicated external power supply terminal, the QJ71GP21S-SX ensures network loop integrity is fully maintained even if individual PLC base units are de-energized, preventing ring segmentation in critical manufacturing plants.
| Parameter | Specification Value |
|---|---|
| Manufacturer | Mitsubishi Electric |
| Model Reference | QJ71GP21S-SX |
| Network Type | CC-Link IE Controller Network |
| Communication Speed | 1 Gbps |
| Transmission Path Format | Double loop (Token ring method) |
| Maximum Stations | 120 stations (with Universal QCPU management station) |
| Optical Fiber Spec | Graded-index (GI) multi-mode optical fiber (1000BASE-SX) |
| Connector Interface | Duplex LC type connector |
| Laser Safety Class | Class 1 (JIS C 6802, IEC 60825-1) |
| Maximum Loop Length | 66,000 meters (with 120 units connected) |
| Inter-Station Distance | Max. 550 meters |
| External Power Input | DC 20.4 V to 31.2 V (Current consumption: 0.28 A) |
| Internal DC 5V Consumption | 0.90 A |
| Occupied I/O Points | 48 points (2 slots required: 16 empty points + 32 intelligent points) |
| Device Dimensions | 98 mm (H) x 55.2 mm (W) x 90 mm (D) |
| Net Weight | 0.28 kg |
| Shipping Weight (Calculated) | 1.30 kg |
| Connector / Terminal | Physical Form | Functional Assignment |
|---|---|---|
| PORT 1 | Duplex LC Optical Interface | Primary network transmit/receive fiber-optic connection (Channel 1) |
| PORT 2 | Duplex LC Optical Interface | Secondary network transmit/receive fiber-optic connection (Channel 2) |
| 24VDC Terminal Block | Screw-clamp connection | External power input (DC 20.4V to 31.2V) to power loop transceiver during PLC down-time |
The "S" suffix identifies this model as having external power supply capabilities. While it maintains backward code compatibility with the standard QJ71GP21-SX unit in GX Works2 or GX Developer programming environments, replacing a standard unit with the QJ71GP21S-SX requires external DC 24V field wiring to leverage its loop backup protection function. Always verify your current configuration utility parameters when shifting between high-performance and universal QCPU backplanes, as maximum node counts scale from 64 to 120.
Multi-mode GI fibers must conform strictly to 1000BASE-SX specifications. Inserting standard telecom single-mode fibers will cause immediate transmitter saturation or high optical attenuation faults. Ensure the bend radius of the optical fiber runs inside enclosures does not drop below the manufacturer's specified limit to avoid micro-bending losses, which directly generate network-level link-loss anomalies and token drops.
Before powering up the system, use a calibrated optical power meter to confirm fiber run losses are well within the 1000BASE-SX link budget. Ensure that Port 1 Out is cross-patched to Port 2 In on downstream nodes as per standard dual-loop layouts. When configuring redundant tracks, the external auxiliary DC supply must be powered through a dedicated class 2 power source with clean grounding to prevent industrial noise and transient surges from interfering with the gigabit transceivers.
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| Country of origin |
United States
|
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