TIWAY 1 Overview
1-5
TIWAY 1 TI505 NIM User Manual
The TI505 NIM provides redundant TIWAY I communication ports. Each of the following
models supports a specific type of network communication media.
PPX: Number
Port A
Port B
PPX:505-7339
Local Line
Local Line
PPX:505-7340
RSĆ232ĆC/423
RSĆ232ĆC/423
The RS-232-C/423 media interface is configured as Data Terminal Equipment (DTE) and
is used to connect the NIM to Data Communication Equipment (DCE) for operation with
modems. This interface uses RS-423 drivers and receivers and operates at RS-423-A
signal levels (+5 or –5 volts). These levels are also RS-232-C compatible. The pin
assignments for the RS-232-C port are given in Chapter 2.
The Local Line interface is a differential line port for use with shielded twisted pair cable.
The Local Line interface provides line isolation and high noise immunity for
installations up to 10,000 feet (25,000 feet depending on system loading and baud rate
selection). The Local Line interface is recommended for applications where electrical
noise may be a problem.
Redundancy is supported for either choice of media.
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