ALP121-S00 S1 Yokogawa PROFIBUS Module

ALP121-S00 S1 Yokogawa CENTUM VP PROFIBUS Module

ALP121-S00 S1 Yokogawa CENTUM VP PROFIBUS Module

Availability: 20 left in stock

Yokogawa ALP121-S00 S1 PROFIBUS Module The Yokogawa ALP121-S00 S1, also cataloged as the ALP121 PROFIBUS Communication Module, operates as a...

SKU: ALP121-S00

Manufacturer: Yokogawa
Product No.: ALP121-S00
Product Type: Communication Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa ALP121-S00 S1 PROFIBUS Module

The Yokogawa ALP121-S00 S1, also cataloged as the ALP121 PROFIBUS Communication Module, operates as a dedicated hardware component for master-level data exchange with field devices within CENTUM VP control systems.

Suffix Breakdown & Model Matrix

Code	Option / Specification	Description
ALP121	Base Model	PROFIBUS-DP Communication Module
-S	Type	Standard Type
0	Always 0	Fixed Code
0	Always 0	Standard Specification
S1	Style Code	Style 1 Hardware Revision

Hardware Specifications

Parameter	Specification
Model	ALP121-S00 S1
Brand	Yokogawa
Origin	Japan
Weight	0.3 kg (Net), 0.45 kg (Shipping)
Dimensions	3.2 cm x 12.7 cm x 12.7 cm
Operating Temp	-20 to +60 deg C
Power Consumption	0.7 A @ 5 VDC backplane power
Interface Type	PROFIBUS-DP Master (EIA-RS-485 compliant)
Communication Ports	1 port (D-sub 9-pin female connector)
Baud Rate	9600 bps to 12 Mbps (auto-detect / configurable)
Max Transmission Distance	1.2 km (at 9600 bps)
Galvanic Isolation	Isolated between field and system backplane

Process Control and DCS Connectivity

The ALP121-S00 S1 module establishes deterministic master communication across RS-485 physical layer networks, connecting CENTUM VP field control units to remote sub-nodes and Intelligent Field Devices. The interface isolation prevents field-side ground loops from propagating into the system backplane logic. Designed to handle high-density data integration, the module continuously polls PROFIBUS-DP slave devices while maintaining compatibility with 4-20 mA HART loop protocol gateways and fieldbus segment couplers for complete plant asset management.

Frequently Asked Questions

Q: How is physical communication terminated on the ALP121-S00 S1 port?

A: Communication connects through a standard D-sub 9-pin female connector, which requires an external PROFIBUS bus connector with integrated switchable RS-485 termination resistors at both segment endpoints.

Q: Can the ALP121-S00 S1 module operate at its maximum transmission distance of 1.2 km at 12 Mbps?

A: No, the 1.2 km maximum line distance applies specifically to the lowest baud rate of 9600 bps. Higher transmission speeds reduce allowable copper segment lengths according to standard PROFIBUS-DP wiring guidelines.

Field Installation Guidelines

Mount the ALP121-S00 S1 module vertically into an open I/O slot of an ESB bus node unit or field control unit backplane. Verify that the node unit power remains switched off before module insertion to avoid backplane connector damage. Secure the module mechanically by tightening the upper and lower retaining screws. Attach a shielded PROFIBUS cable using a DB9 connector with built-in cable strain relief, and ensure the cable shield connects directly to the sub-D housing ground shell. Route signal lines away from high-voltage AC cables to limit electromagnetic interference along the RS-485 transmission path.

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