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| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Yokogawa ALR121 Serial Communication Module
- Product Details
- FAQs
- Related
- Contact Us
- Packing & Delivery
- Product Ratings
Product Overview
The Yokogawa ALR121 Serial Communication Module is a high-performance module designed for field control stations (FCS) to establish serial communication with subsystems like FA-M3, YS series, and PLCs. It supports RS-422 and RS-485 interfaces and provides reliable, half-duplex, start-stop synchronized communication, making it suitable for industrial automation environments.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | ALR121 |
| Interface | RS-422 / RS-485 |
| Communication Method | Point-to-point (RS-422) / Multipoint (RS-485) |
| Transmission Speed | 1200–38400 bps (depending on subsystem) |
| Communication Function | Half-duplex, start-stop synchronization |
| Transmission Distance | Up to 1200 m |
| Dimensions | 126.7 × 32.8 × 130 mm |
| Weight | 0.3 kg |
| Power Consumption | 0.5 A |
| Mounting | ANB10, ANB11, ANR10, AFF50, AFV10, AFV30, AFV40 |
| Ports | 2 ports (same function per module) |
| Supported Protocols | FA-M3, Modbus, MELSEC-A, YS, SLC500, PLC-5 |
| Synchronization | Start-stop |
Applications
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Integration of FCS with FA-M3 PLC systems
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Communication with YS1000 and YS100 series controllers
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Modbus-compatible subsystem integration
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Data exchange with MELSEC-A series PLCs
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Connection to Rockwell SLC500 and PLC-5 systems
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Ideal for process automation and distributed control systems
Advantages
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Supports both RS-422 and RS-485 for flexible connections
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Long transmission distance up to 1200 m
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Dual-redundant operation capability for enhanced reliability
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Supports a wide range of industrial protocols
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Compact and lightweight design
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Easy installation on various Yokogawa node units
FAQs
Q1: What interfaces does the ALR121 support?
A1: The ALR121 supports RS-422 and RS-485 interfaces.
Q2: Can the ALR121 operate in a redundant configuration?
A2: Yes, it supports dual-redundant configurations for high reliability.
Q3: What is the maximum transmission distance?
A3: The maximum transmission distance is 1200 meters.
Q4: How many ports are available on the ALR121?
A4: It has two ports, both configured with the same communication function.
Q5: Which protocols are compatible with the ALR121?
A5: It supports FA-M3, Modbus, MELSEC-A, YS series, SLC500, and PLC-5 protocols.
Q6: What is the power consumption of the ALR121?
A6: The ALR121 consumes 0.5 A of current.
Q7: Which Yokogawa units can the ALR121 be installed on?
A7: It can be mounted on ANB10, ANB11, ANR10, AFF50, AFV10, AFV30, and AFV40.
Q8: What is the weight of the ALR121?
A8: The module weighs 0.3 kg.
Q9: What is the size of the ALR121?
A9: Its dimensions are 126.7 × 32.8 × 130 mm.
Q10: Does it support multipoint communication?
A10: Yes, it supports multipoint communication in RS-485 mode.
Recommended Related Models
| Model | Interface | Protocol Support | Dimensions (mm) | Weight |
|---|---|---|---|---|
| ALR111 | RS-232C | FA-M3, Modbus, etc. | 126.7 × 32.8 × 130 | 0.3 kg |
| ALE111 | Ethernet | Modbus TCP/IP | 126.7 × 32.8 × 130 | 0.3 kg |
| ALF111 | Fieldbus | FOUNDATION Fieldbus | 126.7 × 32.8 × 130 | 0.3 kg |
| ALP111 | Profibus | PROFIBUS DP | 126.7 × 32.8 × 130 | 0.3 kg |
| ALP121 | Profibus (redundant) | PROFIBUS DP | 126.7 × 32.8 × 130 | 0.3 kg |
| ALE121 | Ethernet (redundant) | Modbus TCP/IP | 126.7 × 32.8 × 130 | 0.3 kg |
Popular Yokogawa Models
| Model | Description | Dimensions (mm) | Weight |
|---|---|---|---|
| PW101 | Power Module | 126.7 × 32.8 × 130 | 0.3 kg |
| PW102 | Redundant Power Module | 126.7 × 32.8 × 130 | 0.3 kg |
| PW302-S4 | High Capacity Power Module | 126.7 × 32.8 × 130 | 0.3 kg |
| PW401 | Power Supply Module | 126.7 × 32.8 × 130 | 0.3 kg |
| PW402 | Power Supply Module | 126.7 × 32.8 × 130 | 0.3 kg |
| ALR121 | Serial Communication Module | 126.7 × 32.8 × 130 | 0.3 kg |
FAQs
Q1: What interfaces does the ALR121 support?
A1: The ALR121 supports RS-422 and RS-485 interfaces.
Q2: Can the ALR121 operate in a redundant configuration?
A2: Yes, it supports dual-redundant configurations for high reliability.
Q3: What is the maximum transmission distance?
A3: The maximum transmission distance is 1200 meters.
Q4: How many ports are available on the ALR121?
A4: It has two ports, both configured with the same communication function.
Q5: Which protocols are compatible with the ALR121?
A5: It supports FA-M3, Modbus, MELSEC-A, YS series, SLC500, and PLC-5 protocols.
Q6: What is the power consumption of the ALR121?
A6: The ALR121 consumes 0.5 A of current.
Q7: Which Yokogawa units can the ALR121 be installed on?
A7: It can be mounted on ANB10, ANB11, ANR10, AFF50, AFV10, AFV30, and AFV40.
Q8: What is the weight of the ALR121?
A8: The module weighs 0.3 kg.
Q9: What is the size of the ALR121?
A9: Its dimensions are 126.7 × 32.8 × 130 mm.
Q10: Does it support multipoint communication?
A10: Yes, it supports multipoint communication in RS-485 mode.
Recommended Related Models
| Model | Interface | Protocol Support | Dimensions (mm) | Weight |
|---|---|---|---|---|
| ALR111 | RS-232C | FA-M3, Modbus, etc. | 126.7 × 32.8 × 130 | 0.3 kg |
| ALE111 | Ethernet | Modbus TCP/IP | 126.7 × 32.8 × 130 | 0.3 kg |
| ALF111 | Fieldbus | FOUNDATION Fieldbus | 126.7 × 32.8 × 130 | 0.3 kg |
| ALP111 | Profibus | PROFIBUS DP | 126.7 × 32.8 × 130 | 0.3 kg |
| ALP121 | Profibus (redundant) | PROFIBUS DP | 126.7 × 32.8 × 130 | 0.3 kg |
| ALE121 | Ethernet (redundant) | Modbus TCP/IP | 126.7 × 32.8 × 130 | 0.3 kg |
Popular Yokogawa Models
| Model | Description | Dimensions (mm) | Weight |
|---|---|---|---|
| PW101 | Power Module | 126.7 × 32.8 × 130 | 0.3 kg |
| PW102 | Redundant Power Module | 126.7 × 32.8 × 130 | 0.3 kg |
| PW302-S4 | High Capacity Power Module | 126.7 × 32.8 × 130 | 0.3 kg |
| PW401 | Power Supply Module | 126.7 × 32.8 × 130 | 0.3 kg |
| PW402 | Power Supply Module | 126.7 × 32.8 × 130 | 0.3 kg |
| ALR121 | Serial Communication Module | 126.7 × 32.8 × 130 | 0.3 kg |
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Excellent PLC Co., Ltd. has a large number of brand new and original PLC and DCS spare parts, with more than 60 cooperative countries. All products are guaranteed for 1 year and delivered to you by high-quality express. We are committed to using the best products and the most favorable prices to meet the needs and friendship of our customers. We have won the trust of thousands of customers, including these excellent customers.
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