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YOKOGAWA / NETWORK COMMUNICATION
ALF111-S00 S1
FOUNDATION Fieldbus Communication Module
A multi-port H1 communication module designed to connect FOUNDATION Fieldbus devices with Yokogawa control-system architecture.
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4
H1 Ports
31.25
kbps
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The Yokogawa ALF111-S00 S1 is a FOUNDATION Fieldbus communication module for H1 field networks. It performs the Link Active Scheduler (LAS) function and Clock Master function, coordinating communication with field devices connected to its segments.
The ALF111 platform provides four fieldbus ports, with one segment assigned to each port. It supports up to 32 fieldbus devices per segment, including the ALF111 itself, and up to 48 control I/O points per segment. Two ALF111 modules can be installed in adjacent slots of the same node unit for a dual-redundant arrangement.
| Manufacturer | Yokogawa |
| Model | ALF111-S00 S1 |
| Module Type | FOUNDATION Fieldbus Communication Module |
| Interface | FOUNDATION Fieldbus, low-speed voltage mode |
| Number of Ports | 4 ports, 1 segment per port |
| Transmission Speed | 31.25 kbps |
| Fieldbus Devices | Maximum 32 units per segment, including ALF111 |
| Control I/O Channels | Maximum 48 points per segment |
| Communication Functions | LAS function and Clock Master function |
| Redundancy | Dual-redundant configuration supported with two units in adjacent slots of the same node unit |
| Bus Connection | Pressure-clamp terminals; removable terminal block with switchable built-in terminators |
| Terminal Board Connection | Dedicated cable connection |
| Withstand Voltage | 1500 V AC for 1 minute, under specified test conditions |
| Current Consumption | 0.5 A or less |
| Weight | Approximately 0.40 kg for the ALF111 module specification |
| Segment Capacity | Plan the device count per segment with the ALF111 included in the maximum count of 32 units. |
| Control I/O Points | Keep the segment control I/O point total within the 48-point limit and review scan-cycle requirements. |
| Bus Termination | Check the terminator setting and segment topology when troubleshooting intermittent fieldbus communication. |
| Redundant Pair | Confirm that the two modules occupy the supported adjacent slots in the same node unit and that the control-system configuration is prepared for redundancy. |
| Within 7 Days | Contact us within 7 days of receipt if you encounter a problem. |
| Item Condition | The item should be returned in its original condition, with the reason for return clearly stated. |
| Refund / Exchange | A refund or replacement can be arranged after the returned item is received. |
| Return Freight | Return shipping expenses are the buyer's responsibility. |
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