NTDI01 Digital I/O Termination Unit

The Digital I/O Termination Unit (TDI) is an interface for INFI 90® Process Management System I/O signals. It provides the
physical connection points for process field wiring, and configures the system I/O signals.
This instruction describes the purpose, features and specifications of the termination unit. It details the procedures to follow
to set up and install the termination unit, and explains maintenance and replacement procedures. The system engineer or technician using the TDI should read
and understand this instruction before installing and configuring the termination unit. In addition, a complete understanding of the INFI 90 system is beneficial to the user.

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NTDI01 Digital I/O Termination Unit

The Digital I/O Termination Unit (TDI) is an interface for INFI 90® Process Management System I/O signals. It provides the
physical connection points for process field wiring, and configures the system I/O signals.
This instruction describes the purpose, features and specifications of the termination unit. It details the procedures to follow
to set up and install the termination unit, and explains maintenance and replacement procedures. The system engineer or technician using the TDI should read
and understand this instruction before installing and configuring the termination unit. In addition, a complete understanding of the INFI 90 system is beneficial to the user.

The Digital I/O Termination Unit (NTDI01) is an interface for
INFI 90 Process Management System I/O signals. These signals are used to control and monitor processes. Termination
units provide the physical connection points for process field wiring, and configure the system I/O signals.
This instruction explains the purpose, features and specifications of the Digital I/O Termination Unit (TDI). It also details
setup, installation, maintenance and replacement procedures. Figure 1-1 illustrates an INFI 90 application using a TDI for termination.

NTDI01

System engineers and technicians should read this manual before installing and operating the TDI. DO NOT install the TDI
until you read and understand this instruction

A TDI is a single printed circuit board that attaches to a Field Termination Panel (NFTP01) inside an INFI 90 cabinet. Two
screws and spacers secure the TDI in place. Up to sixteen individual I/O signals can be connected to the TDI. The printed circuit board consists of:
1. Sixteen point configuration sockets (XU1 to XU16) to configure each I/O signal.
2. Four terminal blocks (TB1 to TB4) that provide the physical connection points for I/O signals.
3. A termination cable socket (P1) that connects the termination unit to its slave or master module.
4. I/O power (24 VDC, 125 VDC or 120 VAC) connection points (E1, E2 and E3 common) for system powered configurations.
5. Two on-board fuses (F1 and F2) to protect the E1/E2 power supplies and field devices connected to the termination unit.
6. A termination unit configuration socket (XU17) to configure TDI signal routing for some applications.

 

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