Section 1. System Description; Introduction; Transmitter Description; Receiver Description - Remtron Command Pro 21T10 User Manual

1.1 INTRODUCTION

The Remtron
Systems are designed for control of industrial rated
machinery. This system complies with requirements for
operation under part 15 of the FCC rules and regulations.
This means neither the operator nor the company need
apply or register for a license to operate this equipment.
The basic system consists of a transmitter and a receiver.
The transmitter sends commands to the receiver by means
of radio waves in the 900 MHz band. Receivers operate
from 115 VAC 50/60 Hz power. Operation from 220
VAC is also available.

1.2 TRANSMITTER DESCRIPTION

The hand held transmitters are housed in
rugged cases molded from a modified polymer plastic
that stands up to extremely rugged use. A key feature of
the hand held transmitters is Remtron's patented switch
assembly for control inputs. This long life elastomeric
keypad is ergonomically designed to provide easy
operation over long periods of time with exceptional
reliability.
The lever and joystick transmitters provide
rugged yet lightweight housings that allow daylong use
without a strain on the back.
All the transmitter functions are controlled by a
microprocessor with a special memory for configuration
information. This offers a great degree of capability and
versatility while at the same time providing simplicity of
operation and maintenance.
The antenna is internal to most transmitter cases, protecting
it from damage. An indicator LED provides a quick
visual check of the transmitters status.
The transmitter sends data at two rates. When a switch
is pressed or released, three rapid commands are
generated to insure a fast system response. The transmitter
then reverts to a 1/3 rate to conserve battery power.
The crane control transmitters are designed to be very
efficient. Only two AA batteries are needed to provide
SECTION 1: SYSTEM DESCRIPTION
Radio Remote Control
power for the 21T10 or 21T14 transmitters for a month's
normal use. Other transmitters contain additional batteries
for even longer operating time between battery changes.
An additional feature automatically shuts the transmitter
off after a preset time interval of inactivity to further
extend the battery life.
Refer to Section 5 for details on the specific transmitter
supplied with your system.

1.3 RECEIVER DESCRIPTION

The
subassemblies, an RF/Decoder board and a Relay board,
mounted inside a NEMA 12 cabinet. They are equipped
with two safety relays in addition to the control relays.
RF/Decoder Board
The RF/Decoder Board contains the Radio Receiver
and the Microprocessor based control system. Signals
are received by an advanced synthesized RF module
that operates in conjunction with the microprocessor.
Commands are received on one of 87 possible
frequencies and are checked against a 16 bit address
code for proper identity and further tested against a 16
bit CRC check code. This insures only valid information
meant only for the particular unit is decoded.
The microprocessor contains a nonvolatile memory that
retains the frequency, address and particular operating
parameters for the system. The receiver is programmable
by means of PC compatible computers equipped with
an RS-232 serial port or by an independent programming
unit.
Relay board.
The Relay board contains the output relays and the power
supply. Two (2) relays form part of the safety system.
All outputs include spike snubbers to remove transient
voltages from the control lines.
For convenience, the interface terminal strips are un-
pluggable. The relay board can be easily removed without
the necessity of tracking wire numbers and positions.
The power is from 115 VAC, 50/60 Hertz. Optional
1.1
receivers consist of two