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.