Emerson 01-W3878F-02D Control Module

General Description

The 01-W3878F-02D belongs to Emerson’s DeltaV I/O family, which provides flexible and scalable I/O solutions for process control. This module features a combination of analog and digital I/O channels, each individually configurable. It mounts on a DeltaV I/O carrier and communicates with the controller over a redundant fieldbus. The module is designed for use in hazardous locations and features intrinsic safety options for field devices.

Key Features

• I/O Channels: 8 analog inputs (4-20 mA/HART), 4 analog outputs (4-20 mA/HART), and 8 digital inputs (24 V DC).

• HART Communication: Built-in HART modem for each analog channel, enabling access to field device diagnostics.

• Configurability: Each channel can be configured for current, voltage, or digital modes via software.

• Diagnostics: Per-channel open-circuit detection, short-circuit monitoring, and module health status.

• Redundancy: Supports redundant I/O carriers and communication for high availability.

• Isolation: 1500 V AC isolation between field circuits and system logic.

• Power Supply: 24 V DC from DeltaV backplane or external source.

Technical Specifications

• Analog Input Resolution: 16-bit A/D, accuracy ±0.1% of span.

• Analog Output Resolution: 16-bit D/A, load 750 Ω max.

• Digital Input: 24 V DC, ON >15 V, OFF<5 V, 5 mA typical.

• Digital Output: 24 V DC, 0.5 A per channel, short-circuit protected.

• Update Rate: 100 ms for all channels.

• Operating Temperature: -40°C to +70°C.

• Dimensions: 125 x 45 x 115 mm (H x W x D).

• Hazardous Area: ATEX, IECEx Zone 2 / Class I Div 2 (optional).

Functional Description

The module continuously scans input channels and communicates values to the DeltaV controller via the I/O bus. Output channels are updated based on controller commands. The integrated HART modems enable communication with smart transmitters, allowing access to secondary variables and diagnostic data. The module includes a watchdog timer that sets outputs to a user-defined safe state upon loss of communication.

Applications

• Process control in chemical, pharmaceutical, and refining industries.

• Oil and gas production and pipeline monitoring.

• Power generation and water treatment.

• Batch and continuous process automation.

Installation and Integration

The module installs in a DeltaV I/O carrier (e.g., CHARM or conventional). Configuration is performed using DeltaV Explorer, where I/O channels are assigned to control modules. The module supports electronic marshalling, reducing engineering effort. Field wiring is terminated on a separate termination assembly.

Certifications

• CE, UL, and CSA.

• ATEX, IECEx for hazardous locations.

• Marine approvals (DNV, ABS).

• RoHS compliant.

Note: This document provides technical information only; refer to the Emerson DeltaV I/O product manual for detailed specifications.