ABB NTDI02 Digital I/O Termination Unit Overview

The NTDI02 Digital I/O Termination Unit is a Harmony rack

I/O device that is part of the Symphony Enterprise Manage

ment and Control System. It provides a signal path between

field I/O signals and the following I/O modules.

• Analog output module (IMASO11).

• Digital input module (IMDSI13. IMDSI14. and IMDSI22).

• Pulse input module (IMDSM04).

• Digital output module (IMDSO14 and IMDSO15).

• Frequency counter module (IMFCS01).

The NTDI02 is not a direct replacement for the NTDI01; how

ever, it is a functional replacement for the NTDI01.

This instruction explains the NTDI02 termination unit specifi

cations and operation. It details the procedures necessary to

complete setup, installation, maintenance, repair, and replace

ment of the termination unit.

NOTE: The NTDI02 termination unit is fully compatible with existing INFI 90®

OPEN and Symphony™ Enterprise Management Systems.

Overview

Intended User

Section 1

The NTDI02 Digital I/O Termination Unit is a Harmony rack

I/O device that is part of the Symphony Enterprise Manage

ment and Control System. It provides a signal path for up to

16 input signals to the following I/O modules. The inputs are

used by the controller to monitor and control a process.

• Analog output module (IMASO11).

• Digital input module (IMDSI13. IMDSI14. and IMDSI22).

• Pulse input module (IMDSM04).

• Digital output module (IMDSO14 and IMDSO15).

• Frequency counter module (IMFCS01).

Figure 1-1 shows the Harmony rack I/O architecture. A Har

mony area controller and the Harmony rack controllers can

use the rack I/O module and termination units for I/O interface.

Personnel installing, operating, or maintaining the NTDI02 ter

mination unit should read this instruction before performing

any installation, operation, or maintenance procedures. Instal

lation requires an engineer or technician with experience

handling electronic circuitry. Those working with the NTDI02

termination unit should have experience working with and

know the precautions to take around AC/DC power. A knowl

edge of the Symphony system and electronic principles is also required.