1. Introduction
This manual includes general information concerning the operation of the radio remote Machine Control Unit
(MCU) series CT24. The information is of a general nature and does not include system-specific data. System-
specific data is provided in the technical documentation accompanying the delivery of the system.
For information pertaining to the matching Operator Control Unit (OCU), please refer to the separate OCU user
manual.
Terminology
The following represents important acronyms and long form names used in this document:
• OCU – Operator Control Unit, historically referred to as a transmitter
• MCU – Machine Control Unit, historically referred to as a receiver
• ASO – Automatic Safety Override; in this context, a fully automatic system shutdown made possible by
the use of safety relays on motion output relays to detect a welded or closed contact when it should be
open
• N/O – SPST Normally Open, Form A
• N/C – SPDT Normally Closed, Form C (BBM)
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