YOKOGAWA LC81*B Logic Control Module

Product Description

The YOKOGAWA LC81*B is a logic control module designed for use within Yokogawa's CENTUM VP distributed control system (DCS), specifically integrated into the Field Control Station (FCS). It functions as the logic computation unit that handles sequential and interlock control applications. The LC81*B ensures deterministic logic execution with high reliability and supports redundant configuration for enhanced system availability.

Technical Specifications

• Model: LC81*B

• Function: Logic computation and sequence control

• System Compatibility: CENTUM VP Field Control Station (FCS)

• Redundancy: Supports dual-redundant operation

• Control Capacity:

• Logic chart capacity: Up to 10,000 steps (approximate)

• Number of logic charts: Up to 256 per module

• Memory:

• Battery-backed SRAM for logic program and data retention

• Flash memory for firmware storage

• Cycle Time: Minimum 100 ms (typical)

• Communication Interface:

• Internal high-speed bus connection to FCS

• Access to I/O modules through node bus

• Power Supply: 5 VDC (supplied via baseplate)

• Operating Temperature: 0 to 50°C

• Storage Temperature: -20 to +70°C

• Humidity Range: 5% to 95% RH (non-condensing)

• Mounting Method: Installed on FCS baseplate

• Dimensions: Approx. 115 mm (H) × 27 mm (W) × 150 mm (D)

• Weight: 0.4 kg