Description

The DAP112 is a high-density digital output interface module designed for the legacy Schneider Electric Modicon A120 programmable logic controller system. This module provides 16 independent discrete output channels configured for 24 V DC operation, facilitating reliable signal transmission, actuator control, and relay coil switching in demanding industrial environments such as power generation and petroleum processing. The module incorporates advanced solid-state switching and galvanic isolation to protect the control logic from field-side electrical disturbances.

Features

• 16 independent discrete output channels.
• Source-type (positive logic) output configuration.
• Integrated electronic current limiting for short-circuit protection.
• Built-in free-wheeling clamping diodes for inductive load suppression.
• 1500 V AC galvanic isolation between field wiring and the logic bus.
• Front-panel LED diagnostic matrix for module status, error detection, and individual channel state monitoring.
• Removable front-accessible terminal block for efficient maintenance.

Applications

The DAP112 is engineered for use in industrial automation systems requiring high-density output control, including:

• Petroleum and chemical processing installations.
• Electrical power generation and distribution plants.
• Mining and material extraction facilities.
• General-purpose discrete control loops for actuators and solenoid valves.

Technical Specifications

Installation Guidelines

• Ensure the PLC system power is disconnected before installing or removing the module from the backplane.
• Mount the module in an environment compliant with the specified operating temperature (0 to 60 deg C) and humidity (5% to 95% non-condensing).
• Use shielded cables for field-side wiring to minimize electromagnetic interference (EMI) in high-noise environments.
• Verify that all field-side loads are within the 0.5 A per channel and 8.0 A total module current limits.
• Ensure proper grounding of the Modicon A120 rack assembly to maintain the integrity of the galvanic isolation barrier.
• Handle the module using ESD-safe practices to prevent damage to internal solid-state components.

FAQ

What is the primary function of the DAP112 module?

The DAP112 is a 16-channel discrete output module for the Modicon A120 system, used to switch 24 V DC field loads such as relays, solenoids, and actuators.

Does this module provide protection against short circuits?

Yes, the module features integrated electronic current limiting with automatic restart functionality to protect against short circuits and overloads.

What is the isolation rating of the DAP112?

The module provides 1500 V AC galvanic isolation between the field-side wiring and the internal Modicon A120 logic bus.