Yokogawa ALF111-S50 FOUNDATION Fieldbus Communication Module
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Sku:ALF111-S50
Country Of Origin: Japan
Vendor: Yokogawa
Type: FOUNDATION Fieldbus Communication Module
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Product description
Yokogawa ALF111-S50 FOUNDATION Fieldbus Communication Module
Configured for FOUNDATION Fieldbus H1 communication in Yokogawa CENTUM VP, CENTUM CS 3000, and ProSafe-RS platforms, the Yokogawa ALF111-S50 (ALF111 FOUNDATION Fieldbus Communication Module) provides four independent H1 communication ports for digital signal exchange between Field Control Stations and field devices.
Suffix Breakdown & Model Matrix
Code
Specification
ALF111
FOUNDATION Fieldbus Communication Module
-S
Standard type
5
No explosion protection
0
Basic type
ALF111-S50
Complete model designation
Hardware Specifications
Parameter
Specification
Model
ALF111-S50
Brand
Yokogawa
Origin
Not specified in supplied data
Module Type
FOUNDATION Fieldbus Communication Module (FF-H1)
Interface / Protocol
FOUNDATION Fieldbus H1, Low-Speed Voltage Mode
Baud Rate
31.25 kbps
Number of Ports
4 independent H1 ports / segments
Connected Devices
Up to 32 devices per segment, subject to system configuration
Max I/O Points
Up to 48 points per segment
Current Consumption
<= 0.5 A at 5 VDC supply
Power Consumption
<= 2.5 W, based on 5 VDC and <= 0.5 A
Withstanding Voltage
1,500 VAC for 1 minute, field-to-system isolation
Connection Terminal
Pressure Clamp Terminal Block, such as NFTF9S, or cable to terminal board such as AKB336
Weight
0.40 kg
Dimensions
32.8 x 130.0 x 127.5 mm
FOUNDATION Fieldbus H1 Communication
The ALF111-S50 provides four independent FOUNDATION Fieldbus H1 segments operating at 31.25 kbps. Each segment supports digital communication with field devices including smart transmitters, control valves, and flowmeters. The module can operate as a Link Master and Link Active Scheduler (LAS), providing scheduled communication control on the H1 segment.
The module also supports Clock Master functionality for time synchronization of connected fieldbus devices. Dual-redundant pairing is supported using adjacent node slots, allowing the secondary module to assume communication operation when the primary module fails.
Field-to-system isolation is specified at 1,500 VAC for 1 minute. The supplied data does not specify individual channel-to-channel isolation characteristics.
Frequently Asked Questions (FAQ)
Q: What is the communication rate of the ALF111-S50? A: The FOUNDATION Fieldbus H1 interface operates at 31.25 kbps.
Q: How many H1 segments are provided by one ALF111-S50 module? A: The module provides four independent H1 communication ports or segments.
Q: What is the specified module power requirement? A: Current consumption is specified as no more than 0.5 A from a 5 VDC supply, corresponding to no more than 2.5 W when calculated from the stated maximum current.
Field Installation Guidelines
Install the module in the designated Yokogawa system node and use the specified connection terminal or terminal-board interface.
Verify the module orientation and mechanical seating before energizing the system.
Use the designated FOUNDATION Fieldbus H1 wiring topology and maintain appropriate separation from high-voltage and high-current conductors.
Terminate cable shields according to the project grounding design and Yokogawa system installation requirements.
Verify field-to-system isolation requirements before connecting field wiring.
For redundant configurations, install the paired modules in the specified adjacent node positions.
Confirm segment device count, I/O allocation, and network configuration against the actual CENTUM VP, CENTUM CS 3000, or ProSafe-RS configuration.
Do not assume an operating-temperature rating or channel-to-channel isolation value where it is not stated in the supplied technical data.
Answer 1: PLC DCS Pro Ltd. collaborates with over 50 countries worldwide. As a leading supplier in China, we can provide significant discounts to customers based on market demand.
Question 2: What Is The Warranty Period?
Answer 2: We offer a standard one-year warranty for all new and original items.
Question 3: What Payment Methods Do We Accept?
Answer 3: We accept 100% T/T (Telegraphic Transfer) before shipping. For items with a lead time, a 30% deposit is required in advance, with the remaining 70% balance due before shipping. If you have an agent in China, please contact us for RMB transfer.
Question 4: What Shipping Methods Do We Use?
Answer 4: We primarily utilize carriers such as FedEx, DHL, UPS, BRE, etc. If you have an account with any of these carriers, you can arrange the shipping yourself. Additionally, we offer free shipping to China freight forwarders.
Question 5: What Is Our Delivery Time?
Answer 5: Typically, delivery takes around 1-3 days after receiving the advance payment. For items with a quoted lead time, delivery will occur as per the specified lead time.
Question 6: How Do We Package The Goods?
Answer 6: Our packaging process involves multiple layers of protection. Initially, the product is placed in its original box, sealed with a label. Then, we add a layer of bubble wrap to safeguard against collisions during transportation. Finally, all products are securely packed in sturdy boxes for further protection.
Question 7: How Can Customers Contact Us And Request A Quote?
Answer 7: Customers can inquire via email, WhatsApp, WeChat, Skype, or any preferred communication platform. Simply reach out to us, and we'll promptly provide a quote tailored to your needs.
Warranty Conditions
At PLC DCS Pro Ltd., we are committed to ensuring the quality of our products. Our one-year warranty provides coverage for any defects in material or workmanship, excluding damages caused by deliberate misuse.
🛡️Coverage Details:
This warranty encompasses all instances of product malfunction or failure due to inherent manufacturing flaws, with the exception of intentional damage.
📝Claim Process:
To avail of warranty services, please notify us of any quality-related issues within the warranty period. We may conduct online troubleshooting and examination as needed.
🚚Shipping Assistance:
We understand the importance of prompt service. Therefore, we cover return shipping costs for warranty-related returns within the first month of supply. Within three months of supply, we cover one-way shipping costs for warranty-related returns. After three months, the customer is responsible for shipping costs both ways.
🚫Exclusions:
Unauthorized modifications, repairs, or misuse of the product.
