MOTOROLA 188987-008R / 188987-008R001 High-Precision Analog I/O Module

MOTOROLA 188987-008R / 188987-008R001 High-Precision Analog I/O Module

Introduction

The MOTOROLA 188987-008R (also identified by its full assembly number 188987-008R001) 

is a high-performance Analog Input/Output (I/O) module specifically designed for Distributed Control Systems (DCS) and Programmable Logic Controllers (PLC).

This module serves as a critical interface for translating real-world physical signals (like pressure, temperature, or flow) into digital data that a central processor can interpret.

Built for industrial-grade environments, the 188987-008R series is recognized for its high-resolution 12-bit conversion capabilities and its modular design,

 which allows for seamless integration into Motorola’s legacy automation racks.

Technical Parameter Table

Related Models

MOTOROLA 188987-001: Standard version with fixed input parameters.

MOTOROLA 188987-008R002: Variant with modified firmware for specific DCS timing requirements.

MOTOROLA MVME162 / MVME147: Processor modules frequently used to control these I/O boards.

MOTOROLA AET-3047: The industrial performance control frame often housing these modules.

Application Cases

Process Control & Automation: Real-time monitoring of chemical reaction parameters in refineries and pharmaceutical plants.

Data Acquisition (DAQ): Collecting precise analog telemetry from sensors in laboratory and testing environments.

Logic Execution: Providing the feedback loop necessary for PID control in HVAC and high-pressure manifold systems.

Marine Automation: Used in shipboard engine monitoring systems where vibration resistance and reliable analog signal processing are vital.

Product Advantages and Features

Individually Configurable Channels: Each channel can be set to either voltage or current mode independently, providing extreme flexibility in the field.

High-Resolution Accuracy: The 12-bit (11-bit plus sign) resolution ensures that even minute changes in sensor input are captured accurately.

Self-Protection Mechanism: The current inputs feature a shunt-disabling safety feature that automatically attempts to reactivate every second if an over-current condition occurs.

Modular Integration: Designed specifically for the Motorola DCS family, ensuring plug-and-play compatibility with existing VME and PLC backplanes.

Other Models in the Same Series

MOTOROLA 188987-002: High-density digital input module.

MOTOROLA 188987-003: Relay output module for high-load switching.

MOTOROLA MVME5500: High-speed processor module often paired with the 188987 series in large-scale installations.

Installation and Maintenance

Installation: Ensure the power to the DCS/PLC rack is off. Align the module with the card guides and firmly seat it into the backplane connector. Secure with the front-panel captive screws.

Wiring: Connect analog signals to the front-panel terminal block. For voltage inputs, unused channels should be bridged to improve noise immunity.

Diagnostics: Monitor the onboard LED indicators (if present) for status updates. The software system will typically report "Overflow" if input signals exceed the 10V or 20mA limit.

Maintenance: No periodic calibration is required for the solid-state components, but signal terminal connections should be checked annually for tightness in high-vibration environments.

Unique Product Description

The Motorola 188987-008R001 is more than just a converter; it is the vital link between physical reality and digital precision.

By combining robust self-protection with multi-mode flexibility, it eliminates the need for multiple specialized cards.

Its ability to switch between 12-bit and 8-bit modes allows it to balance speed and accuracy based on the specific needs of your automation loop.

For engineers maintaining reliable, legacy industrial infrastructure, the 188987-008R remains the gold standard for dependable analog signal processing.