Specifications

Table Of Contents
Data Modules
21-18 Issue 11 December 1999
Power Supply Unit
An individual power supply unit is required with the 7400D data module only when
it is used as a stand-alone module. When the 7400D is rack-mounted in a 77A
rack-mount, the rack-mount provides powering capabilities for up to eight units.
The power supply unit connects a grounded AC outlet and the POWER
connector at the rear of the data module. This power supply unit provides the
necessary operating voltages for the data module.
Test s
The 7400D data module supports only the Self- test.
Data Module Features
You can control the following operations via the 7400Ds front panel:
Option settings
Self-Test and Reset Options features
Adjustment of the contrast on the display
Answer/disconnect and busyout
The following features are also available:
Automatic or manual answering of incoming data calls
Synchronous full-duplex operation
Data rates of 300, 1200, 2400, 4800, 9600, and 19,200 bits per second