User's Manual

TB8100 Installation and Operation Manual Connection 113

7.4.1 Digital Interface

The system interface board provides several different types of digital

interface connections. The type and number of connections available

depends on the type of system interface board. These connections are

described in “System Interface Connections” on page 114, and also in the

Service Kit (Configure > Base Station > System Interface). For details on

the interface levels for these connections refer to the Specifications Manual.

The digital interface signals supported by the TB8100 base station are

described below.

Digital Inputs Digital inputs are read by the reciter RISC and can be used to perform

various actions based on the configuration of the reciter. The two major

uses for digital inputs are Channel Change and Task Manager. For example,

to send a status email when the status of a digital input line is changed, you

can use the following Task Manager statement: IF Digital input 01 active

THEN Email status now.

Digital Outputs All digital outputs are controlled by Task Manager statements. For example,

when any enabled base station alarm goes active, you can indicate this by

turning on digital output 1 with the following Task Manager statement: IF

Base station alarm on THEN Activate digital output 1.

Note Digital outputs 1 and 2 on the reciter may be active while the

TB8100 base station is powering up. This applies to reciters fitted

with a version 0 (zero) system interface board, but does not apply

to reciters fitted with a TaitNet RS-232 system interface board. If

this will cause problems for external equipment connected to the

base station, disconnect the system interface connector when

resetting the base station. To check the version of a system inter-

face board, run the Service Kit and select Monitor > Module

Details > Reciter. In the Versions area, the System Interface

field displays the version number.

Bidirectional Inputs/

Outputs

Bidirectional signals can operate as either digital inputs or digital outputs,

based on how Task Manager is configured. Bidirectional signals use the

same processes described above to set and read the status of digital inputs and

outputs. When a bidirectional pin has its output activated, a reading of that

pin will reflect the current status on that line. Thus, it is possible to use a

bidirectional pin for input-only or output-only actions, if only that specific

action is configured for that digital pin number in Task Manager.