Yokogawa ALP121 PROFIBUS-DP Master Communication Module for CENTUM VP Distributed Control Systems
Yokogawa ALP121 PROFIBUS-DP Master Communication Module for CENTUM VP Distributed Control Systems
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Brand:Yokogawa Electric Item No.:Yokogawa ALP121 Product Origin:Japan Product Dimensions:127 × 32 × 127 mm Product Weight:0.30 kg Payment:T/T, Western Union, Credit Card Goods_stock:15 Shipping Port:Xiamen, China Lead Time:1-3 Days Condition:Brand New And Original Warranty:1 Year Certificate:COO
The Yokogawa ALP121 is a high-reliability PROFIBUS-DP master communication module designed for seamless integration with Yokogawa distributed control platforms such as CENTUM VP. It acts as a communication bridge between the control system and field-level devices, enabling fast and deterministic data exchange across PROFIBUS-DP industrial networks.
Engineered for demanding industrial environments, the ALP121 supports high-speed communication with remote I/O stations, PLC systems, drives, and intelligent field instruments. The module allows the DCS controller to monitor process data in real time while sending precise control commands to field devices. Its flexible installation and high-speed networking capability make it a widely used solution in process automation industries including petrochemical, power generation, and manufacturing.
Technical Specifications
Parameter
Specification
Model
ALP121
Product Type
PROFIBUS-DP Communication Module
Communication Role
PROFIBUS-DP Master
Communication Interface
PROFIBUS-DP
Physical Layer
EIA-RS-485
Communication Port
1 × D-Sub 9-pin (female)
Transmission Speed
9.6 kbps – 12 Mbps
Maximum Transmission Distance
Up to 1.2 km (at 9600 bps)
Communication Capacity
Up to 125 slave devices per segment
Signal Isolation
Field-to-system electrical isolation
Maximum Current Consumption
0.7 A
Compatible Systems
CENTUM VP / CENTUM CS 3000
Dimensions (L × W × H)
127 × 32 × 127 mm
Weight
0.30 kg
The ALP121 is typically installed on field control units or ESB bus node units to enable direct communication between controllers and PROFIBUS-DP slave devices.
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Applications
The ALP121 communication module is widely deployed in industrial automation systems that require stable fieldbus communication.
Typical applications include:
Distributed control system field network integration
PROFIBUS-DP remote I/O communication
Industrial production line automation
Process instrumentation data acquisition
PLC and drive system networking
In large industrial facilities, the ALP121 ensures reliable communication between controllers and multiple field devices, allowing operators to monitor and control production processes efficiently.
Advantages
High-Speed Industrial Data Exchange
Supports PROFIBUS-DP communication speeds up to 12 Mbps, ensuring fast and deterministic data transfer between controllers and field devices.
Flexible Field Device Connectivity
Enables communication with a wide range of PROFIBUS-DP slave devices including PLCs, drives, and remote I/O stations.
Reliable Industrial Communication Design
Electrical isolation between the field network and control system improves system stability and protects equipment from electrical interference.
Redundant Communication Capability
Dual-module configurations can be implemented to improve network availability and reduce downtime in critical process control systems.
Optimized Integration with Yokogawa DCS
Designed specifically for CENTUM platforms, allowing engineers to integrate field devices quickly with minimal configuration complexity.
Technical FAQs
1. What is the main function of the ALP121 module?
It provides PROFIBUS-DP master communication between Yokogawa DCS controllers and field devices.
2. Which communication protocol does ALP121 support?
The module supports the PROFIBUS-DP industrial communication protocol.
3. What is the maximum communication speed?
The module supports speeds from 9.6 kbps to 12 Mbps.
4. How many communication ports are available?
The ALP121 includes one PROFIBUS-DP communication port.
5. What type of connector does the module use?
A 9-pin D-Sub female connector is used for PROFIBUS communication.
6. What is the maximum communication distance?
Up to 1.2 km at 9600 bps, depending on the network configuration.
7. Does the module support redundant communication?
Yes. Two modules can be installed for redundant communication networks.
8. What systems are compatible with ALP121?
It is designed for CENTUM VP and CENTUM CS series distributed control systems.
9. What is the typical power consumption?
Maximum current consumption is approximately 0.7 A.
10. Which industries commonly use this module?
Oil & gas, power generation, chemical processing, metallurgy, and manufacturing automation.
