RFL Electronics 9780 - Description; Figure 7-1. RFL 9780 Tx Logic Module

RFL 9780 RFL Electronics Inc.
November 1, 2000 7-1 (973) 334-3100
SECTION 7. TX LOGIC MODULE
Figure 7-1. RFL 9780 Tx Logic Module
7.1 DESCRIPTION
The RFL 9780 Tx Logic Module interfaces with most of the transmitter modules within the system. It
monitors trip input signals and generates signals for the Transmitter Module (Section 8) to control
frequency shift and power level. The Tx Logic Module also provides status information for the
Sequence of Events Module (Section 15).
The RFL 9780 Tx Logic Module has three LED indicator lamps on its front edge which protrude
through the front panel of the RFL 9780. These include TRIP IN 1, TRIP IN 2, and TX FAIL. All
LEDs are red.
Open-collector transistors are provided on the RFL 9780 Tx Logic Module to drive relays with trip sent
and transmitter fail alarm output signals.