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Yokogawa ALR121-S50 S1 Communication Module with Half-duplex Communication
Yokogawa ALR121-S50 S1 Communication Module with Half-duplex Communication
Half-duplex Communication Module
0.5 A Current Consumption ALR121-S50 S1 Module
365 Days Warranty Yokogawa ALR121-S50
उत्पत्ति के प्लेस:
जापान
ब्रांड नाम:
Yokogawa
मॉडल संख्या:
ALR121-S50 S1
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बोली मांगें
उत्पाद का विवरण
संचार कार्य:
आधा दुमंजिला घर
थोड़ी लंबाई रोकें:
1/2 बिट्स
वर्तमान खपत:
0.5 ए
उद्गम देश:
जापान
उत्पादक:
YOKOGAWA
MOQ:
1 टुकड़ा
गारंटी:
365 दिन
विवरण:
संचार मॉड्यूल
प्रमुखता देना:
Half-duplex Communication Module
,0.5 A Current Consumption ALR121-S50 S1 Module
,365 Days Warranty Yokogawa ALR121-S50
भुगतान और शिपिंग की शर्तें
न्यूनतम आदेश मात्रा
1
मूल्य
66USD
पैकेजिंग विवरण
एकदम नया और मौलिक
प्रसव के समय
2-3 कार्य दिवस
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टी/टी
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उत्पाद का वर्णन
Technical Q&A: Critical Operation Details
Bumpless Failover in Dual-Redundant Configuration
The module utilizes a dedicated duplication (Dx) link to synchronize registers between "Active" and "Standby" units. Should the primary unit detect a bus collision or CRC failure, the secondary takes over the serial bus in real-time. This bumpless transfer ensures that critical PID control loops relying on third-party GC or PLC data don't drop to "Manual" mode due to timeout.
Modbus Traffic Impact on Safety Control Station
No impact. The module is engineered to offload the communication stack. Protocol handling (Modbus RTU/TCP or proprietary) is executed on the ALR121's internal processor, not the main CPU. This ensures that even a saturated 19.2k baud bus won't introduce jitter into the SCS's safety task cycle or compromise deterministic scan times.
Dx LED Status During Hot-Swap Operations
A "Steady Green" Dx LED indicates the duplication link is healthy and the standby module is synchronized. Before pulling a faulty unit, the "Dx" LED on the partner module must be solid. If it's flashing or dark, pulling the faulty board will likely crash the serial bus, as there is no "Ready" partner to assume the Master role.
Handling Late Packets and Framing Errors
The module implements hardware-level Cyclic Redundancy Checks (CRC). Corrupted or delayed packets that fall outside the defined watchdog window are discarded before they hit the DCS database. This is a critical firewall against "dirty" data coming from non-safety PLCs that could otherwise trigger nuisance trips in the control logic.
Troubleshooting ACT LED Flickering with Stagnant HMI Values
Flickering "ACT" means physical layer activity is present, but no data mapping is occurring. Usually, this indicates a Slave ID or Stop-bit mismatch. The slave device is receiving the poll, but due to configuration errors (e.g., Parity mismatch), it isn't returning a valid response. Check port settings in the builder—serial parameters are the primary cause of stagnant I/O.
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We offer significant price advantages on most items. Found a better deal? We'll beat it or match it.
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Sourcing for multiple lines? We arrange volume discounts for multi-brand inquiries.
Surplus Returns
We help maximize returns on surplus MRO inventory, turning idle parts into working capital.
Mission: Empowering global industries with high-quality solutions without the high-end markup.
Budget & Bulk Inquiries
Miya Zheng | Senior Sales Manager
Email: sales@amikon.cn
WhatsApp: +86 180 2077 6792
| Professional service | Transparent pricing | Verified quality |
Inventory & Logistics Capabilities
We stock 30,000+ automation spare parts physically located in our facility, ready to ship before your downtime costs spiral.
| The Hardware | The Velocity | The Assurance |
|---|---|---|
| Physical stock of CPU units, power supply modules, and hot-swap I/O cards | RFQs quoted within 24 hours; orders clear our dock in 72 hours | 12-month warranty on all New Surplus (NS) and factory-sealed units |
Supported Platforms & Systems
| Core Platform Support |
|---|
| DCS/SIS: Triconex (Main Processors), ABB (Advant/800xA), Honeywell Experion, Foxboro PLC/HMI: Schneider Modicon (Quantum), GE Fanuc, Siemens, Bachmann Monitoring: Bently Nevada (3500/3300), EPRO, ENTEK |
Compatible Product Categories
ANALOG_TYPE
- AAI143-H63 // Enhanced logic version
- AAI143-S50 // Standard signal conditioning
- AAI543-H50 // Current output optimized
- AAM50 // Legacy voltage/current sensing
SAFETY_DISCRETE (SIL-RATED)
- SDV144 [Versions: S13, SE3, S53] -- Note: S53 provides upgraded diagnostics
- SDV531 [Versions: S23, S33] -- Check coil voltage compatibility
- SDV541-S53 // SDV551-P53 / P00
- SDV151-P00 // SDV169-P00 // High-density safety packs
COMM_INTERFACE (S1 REVISIONS)
- SCP471-00 S1 // SEC402-51 S1 // S1 denotes hardware hardening
- ALR121-S51 // ALR121-S50 // Verify serial protocol baud rate limits
- VI702 S1 // Vnet/IP dual-redundant card
BUS_REPEATERS & POWER
- SNT501-13 / SNT401-13 // Optical fiber link nodes
- PW444-51 // System power PSU
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