OVERVIEW

The I/A Series system DCS Fieldbus Modules (FBMs) 

are for migration of APACS+™ automation systems 

manufactured by Siemens® Energy & Automation, 

Inc. and Moore Products Co. The FBMs plug directly 

into an existing electronic nest to replace process 

input and output modules.

The I/A Series system DCS FBM family provides a 

migration path from APACS+ process I/O 

components to I/A Series display and supervisory 

functions. No additional communication devices are 

required. No multi-vendor communication software 

licensing is required.

The I/A Series system DCS FBM family replaces the 

APACS+ I/O modules. Once integrated, the process 

is controlled entirely by the advanced I/A Series 

algorithm set.

The I/A Series system DCS FBM product includes 

connectors to enable integration of original process 

signals to I/A Series systems while keeping the field 

interface and wiring. It provides access to all process 

signals connected to the APACS+ system by 

providing the connection between the Field 

Termination Assemblies (FTAs) and the I/A Series 

system. All process signals become fully integrated 

into the I/A Series system through the use of process 

data for operator display, history, alarming and 

control.

Operator functions and engineering configuration are 

accomplished by the I/A Series system at any 

I/A Series operator workstation. Because all process 

values become part of the I/A Series system, all 

configuration data is maintained by the system as 

native I/A Series configurations.

This migration path provides plant operations with all 

the power and flexibility of the I/A Series system.

FUNDAMENTAL PRINCIPLE

Invensys believes that it is only acceptable to 

interface with competing manufacturers’ operating 

systems in two ways:

 Through high level public gateways

 At the lowest level directly to field devices without 

communicating with proprietary buses or 

components.

The Invensys migration product offerings adhere to 

this principle.