Cattron Remtron 21T10 User manual

Remtron®
Engineered Systems
User Manual

Remtron®Engineered Systems
User Manual
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9M02-9028-A021-EN
Version 4.0
Revision History
VERSION
DATE
NOTES
1.0
Initial Release
2.0
04/2014
Updates Styles
Revised Content
2.1
06/2014
Updated Mounting Hole Dimensions for 21R14A
Updated Warning Style
3.0
07/2018
Updated 21T10A, 21T14A and 21T18A FCC ID and IC number
4.0
11/2018
Document rebranded and contact information updated
Any information furnished by Cattron™ and its agents is believed to be accurate and reliable. All specifications are subject to change without notice.
Responsibility for the use and application of Cattronproductsrestswith the end user since Cattronand its agentscannot be aware of all potential
uses.Cattronmakesnowarrantiesastonon-infringementnorastothefitness, merchantability,orsustainabilityofanyCattronproductsforany
specificorgeneraluses.CattronHoldings,Inc.,oranyofitsaffiliatesoragentsshallnotbeliableforincidental or consequentialdamagesofany
kind. All Cattron products are sold pursuant to the Terms and Conditions of Sale, a copy of which will be furnished upon request. When used as a
tradename herein, Cattron means Cattron Holdings, Inc. or one or more subsidiaries of Cattron Holdings, Inc. Cattron™, corresponding logos,
and other marks are trademarks or registered trademarks of Cattron Holdings, Inc. Other marks may be the property of third parties. Nothing
hereinprovidesalicenseunderanyCattronoranythirdpartyintellectualpropertyright.

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Contents
1. Warnings..............................................................................................................................................................6
2. FCC Compliance Statement ................................................................................................................................7
3. Safety Rules.........................................................................................................................................................8
3.1 Installation ..................................................................................................................................................8
3.2 Personal Safety ..........................................................................................................................................8
3.3 Care............................................................................................................................................................8
4. Introduction...........................................................................................................................................................9
4.1 Purpose ......................................................................................................................................................9
4.2 Scope..........................................................................................................................................................9
4.3 Important Safety Rules...............................................................................................................................9
5. Operations......................................................................................................................................................... 12
5.1 How the System Works........................................................................................................................... 12
5.1.1 Frequency............................................................................................................................................ 12
5.1.2 Range and Antenna Coverage............................................................................................................ 12
5.1.3 License-Free Channels........................................................................................................................ 12
5.1.4 Command Format................................................................................................................................ 13
5.1.5 Safety................................................................................................................................................... 13
5.1.6 Carrying Strap for ‘Belly Box’ Controllers ............................................................................................ 13
5.2 Transmitter Operation and Features ....................................................................................................... 14
5.3 Wireless Operation.................................................................................................................................. 14
5.4 Pendant Operation .................................................................................................................................. 14
5.5 Commands .............................................................................................................................................. 15
5.5.1 Command Switches............................................................................................................................. 15
5.6 Status Indicators...................................................................................................................................... 17
5.6.1 Status LED........................................................................................................................................... 17
5.6.2 Function Select LEDs .......................................................................................................................... 17
6. Installation......................................................................................................................................................... 18
6.1 General.................................................................................................................................................... 18
6.2 Locating the Equipment........................................................................................................................... 18
6.2.1 Antenna Location................................................................................................................................. 18
6.2.2 Receiver Location................................................................................................................................ 19
6.3 Installation Wiring.................................................................................................................................... 20
6.3.1 Receiver Power ................................................................................................................................... 20
6.3.2 Relay Outputs...................................................................................................................................... 20
6.3.3 Output Snubbers.................................................................................................................................. 20

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6.4 Installation Procedure –21R14A Receiver ............................................................................................. 20
6.4.1 Power/Control Wiring........................................................................................................................... 20
6.5 Installation Procedure –21R22 Receiver................................................................................................ 24
6.5.1 Power/Control Wiring........................................................................................................................... 24
6.5.2 21R14A Installation Testing................................................................................................................. 27
6.5.3 21R22 Installation Testing................................................................................................................... 27
6.6 Installation Procedure –SAFE-T-RANGE (21R22CR) ........................................................................... 28
6.6.1 21R22CR Power/Control Wiring.......................................................................................................... 28
6.6.2 21R22CR Antenna Installation ............................................................................................................ 28
6.6.3 21R22CR Installation Testing.............................................................................................................. 29
6.6.4 21R22CR Control Range Alignment and Test..................................................................................... 29
6.7 Installation Procedure –22R08A............................................................................................................. 30
6.7.1 22R08A Power/Control Wiring............................................................................................................. 30
6.7.2 22R08A Output Relay Connections..................................................................................................... 32
6.7.3 22R08A Installation Testing................................................................................................................. 32
7. Maintenance & Troubleshooting ....................................................................................................................... 34
7.1 Monthly Inspection................................................................................................................................... 34
7.2 Installation Troubleshooting .................................................................................................................... 34
7.3 Transmitter Troubleshooting ................................................................................................................... 34
7.3.1 Normal Operation ................................................................................................................................ 34
7.3.2 Transmitter Repair............................................................................................................................... 35
7.3.3 Replacing the Transmitter Batteries .................................................................................................... 35
7.3.4 Changing the Transmitter ID Code...................................................................................................... 36
7.4 Transmitter Spare Parts List.................................................................................................................... 38
7.4.1 Handheld Transmitters ........................................................................................................................ 38
7.4.2 Belly Box Transmitters......................................................................................................................... 38
7.5 Receiver Troubleshooting ....................................................................................................................... 39
7.5.1 General................................................................................................................................................ 39
7.6 Receiver Testing...................................................................................................................................... 39
7.6.1 Receiver Repairs ................................................................................................................................. 41
7.6.2 Replacing the Circuit Boards............................................................................................................... 41
7.6.3 Changing the Receiver ID Code.......................................................................................................... 41
7.7 Receiver Spare Parts List........................................................................................................................ 42
8. Warranty Statement .......................................................................................................................................... 43
9. CE Declaration of Conformity............................................................................................................................ 44
Appendix I: Transmitter Specifications.................................................................................................................... 45

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Certifications.................................................................................................................................................... 46
Appendix II: Receiver Specifications....................................................................................................................... 47
Certifications.................................................................................................................................................... 48

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1. Warnings
WARNING
Read all safety rules and warnings before installing and operating this system.
WARNING
The use of unapproved components or accessories in the systems sold by Cattron and its
subsidiaries is strictly prohibited. Unapproved components are defined as any component not
inspected and sold by Cattron. This also includes any component modified from its intended use
and/or any component exhibiting observable damage or defect. Use of non-conforming parts,
assemblies, and accessories may lead to injury or death.
WARNING
The remote control system you have purchased is designed to stop in a safe mode under a variety
of conditions. Some examples of these conditions are: excessive radio signal interference, loss of
battery or electrical power, failure of certain components, operation beyond signal range and
others. Although Cattron and its subsidiaries do not specify the position of the operator when
controlling the equipment, we are aware that some users are instructed and trained by their
employer to ride the equipment in a safe manner. It is imperative that you are prepared for an
unplanned stop of the equipment at any time and do not place yourself or others in a position
where this situation may cause you to fall from the equipment. Failure to use caution may lead to
serious personal injury or death.
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2. FCC Compliance Statement
The CommandPro®Series receivers have been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation.
This equipment generates, uses, and can radiate radio-frequency energy; if not installed and used in accordance
with the user manual, it may cause harmful interference to radio communications. However, there is no guarantee
that harmful interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by
switching this equipment on and off, the user is encouraged to try to correct the interference by one or more of the
following measures:
▪Reorient or relocate the receiving antenna connected to the device that is receiving the interference
▪Increase the separation between our equipment and the equipment that is receiving the interference
▪Consult our factory or one of our Service Representatives for additional help

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3. Safety Rules
WARNING
Read all instructions. Failure to follow these rules can result in serious personal injury.
3.1 Installation
•GROUND THE RECEIVER CASE. In order to ensure safety of the system, firmly connect the receiver
case to earth ground
•PROVIDE A SAFETY CUTOFF SWITCH. If maintenance is required, disconnect the radio from power to
prevent accidental activation
•USE PROPER WIRING. Loose or frayed wires can cause accidental activation of machinery
•DO NOT INSTALL IN HOT AREAS. This apparatus can be damaged by heat in excess of 160º F
•DO NOT INSTALL IN HIGH VIBRATION AREAS. The life of this apparatus may be shortened through
long exposure to intense shaking or vibration
3.2 Personal Safety
•MAKE SURE MACHINERY IS CLEAR BEFORE OPERATING. Do not activate the remote system unless
it is safe to do so
•TURN OFF THE RECEIVER POWER BEFORE WORKING ON MACHINERY. Always disconnect the
remote system before doing any maintenance to prevent accidental operation of the machine
3.3 Care
•KEEP DRY. If water or other liquids get inside, immediately dry the unit
•KEEP ANTENNAS CLEAN. Keep antenna connections clean and free of corrosion
Note: Throughout this manual, other safety rules appear under the following heading:
WARNING
Failure to follow these rules can result in serious personal injury.
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4. Introduction
4.1 Purpose
This manual provides information on the safe installation and operation of the Cattron CommandPro®wireless
control systems. Information is also included on the maintenance and repair of the CommandPro®systems.
4.2 Scope
Information is included on all types of Cattron transmitters and receivers used in industrial applications. Refer to
the detailed information contained in each section for your particular equipment.
The transmitters covered in this manual contain enhanced features that expand the types of applications for the
systems.
Many new features have been added, but most changes are transparent to the user. If you are already familiar
with Cattron transmitters, you are encouraged to read the section on operating the transmitters, where there is
information about the latest changes in operation.
To help you identify your system, Figure 1 and Figure 2 provide a reference for the transmitters and receivers
covered in this manual. Review the Configuration Sheet that came with your equipment for details on the types of
switches and the labels used on your equipment.
4.3 Important Safety Rules
Using wireless control systems with heavy industrial equipment can improve the safety of the equipment.
It is important to adhere to the safety rules presented throughout this manual, especially during installation, in
order to achieve the safest operating system possible.

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21T10(A)
21T14(A)
21T18(A)
21T20
21T23
21T34A
Stepped Lever Control
Transmitter
21T44A
Proportional
Lever Control
Transmitter
21T54A
Joystick Control Transmitter
T08C
Remotely Operated Transmitter
21T74A
Custom Lever Control Transmitter
Figure 1: Cattron CommandPro®Engineered Systems Transmitters

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22R08A
8 Function Receiver
21R14A
14 Function Receiver
21R22
22 to 66 Function Receiver
Figure 2: Cattron CommandPro®Engineered Systems Receivers

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5. Operations
Cattron CommandPro®Wireless Control Systems are designed to control industrial machinery. These rugged
controls are built to survive the wear and tear of life in factories, mills and foundries.
These systems comply with operation requirements under Part 15 of the FCC Rules and Regulations. This means
that 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
through radio waves in the 900 MHz band. Receivers operate at 120 VAC 50/60 Hz power. Operation from other
power sources is also available.
5.1 How the System Works
5.1.1 Frequency
Cattron CommandPro®equipment operates in the 902 to 928 Megahertz (MHz) frequency band. A wavelength at
our frequency is 12.9 inches.
Like light, 900 MHz radio signals pass through glass and plastics, and reflect off of walls, buildings and metal
structures. Unlike light, 900 MHz radio signals penetrate all plastics including those opaque in color, as well as
thin-gauge steel, dry wood, dry concrete, plasterboard, fog and rain. However, the signal will not readily pass
through trees, earth, water, people, aluminium, copper and some window tints.
5.1.2 Range and Antenna Coverage
Antennas convert radio signals into radio waves and convert radio waves back into radio signals. They can send
and receive in all directions or in a single direction, depending on their design.
An omnidirectional antenna is like a light bulb, and a directional antenna is like a flashlight. Metal objects reflect
radio waves, just as a mirror next to a light bulb will reflect light. Metal objects near an antenna alter the intended
pattern of an antenna by either shading or reflecting signals.
Our standard antennas are omnidirectional; they ‘see’ equally well in all directions. We have other antennas that
will ‘see’ further in one direction for special applications.
5.1.3 License-Free Channels
The 902 to 928 MHz spectrum accommodates many license-free users and is set aside by the FCC as an ISM
Band (Industrial, Scientific and Medical). We have the ability to change frequencies in this band and have 81
different channels that we can assign to the transmitter and receiver. The actual frequency is coded into the
receiver and transmitter at the factory but may be changed to one of the other 80 channels in the field if desired.
Other devices in this band include wireless phones, computer data links and inventory equipment. As a condition
of using this band, products must accept and handle interference from other users.
The 900 MHz band works well for most users, and not being burdened with licensing regulations is desirable. The
FCC has allowed 50,000 microvolts per meter field strength on this band, which is 250 times higher than other
unlicensed frequencies below the band. This allows our systems to operate very reliably in the presence of other
signals.

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5.1.4 Command Format
This device uses packet-mode, Frequency Modulation (FM) to carry commands in packet form from our
transmitter to our receiver.
To reduce battery drain, our transmitter transmits for a hundredth of a second, which is long enough to send one
packet to our receiver at a repetition rate of either 16 times per second or four times per second.
The rate varies: 16 times per second for three times when sending a command and four times per second when
there is no change in commands and the transmitter is still on. Any time a lever or switch activates, we send all
control settings three times at the 16-per-second rate and then return to the slower rate of four times per second.
Our receiver uses the slower rate for maintaining transmitter timing and provides for a maintained link where one
is used. The only exception to this is the ‘STOP’ switch, which transmits at 16 times per second as long as it is
depressed. In addition to lever and switch positions, each packet contains a unique address and CRC check sum
(described in the next section).
5.1.5 Safety
Safety and loss of control prevention are very important issues at Cattron. We use a unique identification (ID)
code for each user. There are provisions in our system for 65,535 individual codes.
Each transmission includes a CRC check sum, which is a polynomial created by factoring all of the previous bits
transmitted. Once the receiver receives a valid start command from the transmitter, the receiver tracks the time of
the transmitter and ignores all other transmissions that do not fall within the expected time frame of the
transmitter.
Maintained link systems must receive at least one valid transmission each second in order to allow the remote
controlled equipment to function. The receiver provides a loss-of-signal control output that safely shuts down the
equipment if a loss of signal occurs.
The receiver will not allow equipment restart under its control after a loss of signal until a valid system start
command is received from the transmitter. This prevents an unintended start-up from occurring if the transmitter
returns within range of the receiver and is still operating.
The transmitters also check the position of all controls upon start-up. The transmitter does not issue a start
command if any of the controls are pressed at the time the start command begins. Exceptions for lights, horn, bell
or other user functions that do not place machinery in motion can be mapped into our control logic upon request.
FM systems also have a capture effect, where the strongest signal captures the receiver, which rejects the
weaker signal. The operator is seldom more than 300 feet from the controlled machine. Therefore, the transmitter
is the strongest signal present unless other equipment on this band is allowed to operate within 1000 feet of the
location of the receiver.
5.1.6 Carrying Strap for ‘Belly Box’ Controllers
A Shoulder Carrying Strap (Part Number 600057) is supplied with the 21T34A, 21T44A, 21T54A and 21T74A
‘Belly Box’-style controllers which greatly enhances operator comfort. Operators of these ‘Belly Box’-style
controllers are required to use this approved carrying strap with the controller attached at all times.

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5.2 Transmitter Operation and Features
WARNING
Do not operate the system until you are familiar with radio-controlled operation. If you are not
familiar with radio-controlled operation, contact your supervisor before attempting to use the radio
control system.
IMPORTANT
To stop the system in an emergency, press and hold the OFF/STOP button. Pressing and holding
this button stops all functions.
5.3 Wireless Operation
1. If the transmitter is the ‘belly box’ type, operators are required to use the supplied Shoulder Carrying
Strap with the controller attached at all times.
2. If the transmitter is equipped with pendant capability, verify that the pendant cable is not attached before
switching on the transmitter.
3. Press and release the ON/ALARM button. Verify that the Status LED starts flashing at a low rate. If
equipped, the Alarm function sounds.
4. Press the required switches to operate the desired function. Note that more than one function may be
controlled at any time.
5. To stop sending any command, release the switch.
6. To switch the transmitter off, press the OFF/STOP button. (Note that the transmitter switches itself off if
no commands send for a predetermined time and if Auto Off is enabled).
7. If equipped with a maintained OFF/STOP switch, the transmitter continues transmitting the OFF/STOP
signal for a preset time after the OFF/STOP switch is pressed to the maintained position. Resetting the
switch immediately switches the transmitter off.
5.4 Pendant Operation
1. Connect the pendant cable to the transmitter and receiver. If the transmitter was ON in the normal mode,
it will stop RF transmissions and send commands only through the pendant cable. The transmitter will not
resume RF transmissions until the pendant cable is removed and the transmitter is momentarily switched
off.
2. The remainder of the operation is the same as the wireless operation described above.
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5.5 Commands
5.5.1 Command Switches
The command switches are labeled according to their function.
•If two commands that conflict with each other are attempted, in most cases no function results. In the
case of ON/OFF functions, OFF predominates
•If more than one speed command is sent for the same function, the lower speed predominates
•Maintained On or Off functions require separate commands for ON and OFF
ON/ALARM: This button switches the transmitter on and puts the system in the active mode. It also sends an
ALARM command to the receiver while the switch is depressed. The transmitter remains active until the
OFF/STOP button is pressed or the transmitter switches itself off (see Auto Off).
OFF/STOP: While depressed, this button sends a STOP command to the receiver. The transmitter does not need
to be actively ‘ON’ to send this command. When this switch is released, the transmitter switches off.
AUTO OFF: The transmitter switches itself off if no commands are sent for a predetermined time. Normally this
time is set to 15 minutes, but it may be programmed from 0 to 60 minutes, or disabled using a RAC16 Series
Programmer (01 to 60 = minutes, 00 = disabled).
Levers (21T34A/44A/74A) / Joysticks (21T54A): When in the neutral (center) position, no commands send.
When a paddle moves from the neutral position, a command generates proportional to the amount of movement
(i.e., the further the lever is pushed, the faster the movement is commanded).
Push-to-Operate (PTO) Switch (Optional): The PTO or ‘Dead Man Switch’ is a safety device. The transmitters
are normally programmed so that the switch that activates this function must be depressed before any motor or
other critical function can operate (consult the Configuration Sheet if this switch has an alternate use in your
system).
First-Come First-Serve (FCFS) (Optional): The First-Come First-Serve option allows use of multiple transmitters
with one receiver, one at a time. The receiver scans a preset list of ID Codes. When a valid signal is received, the
receiver stops scanning and responds only to that transmitter’s signal. When the signal is no longer being
received (that is, the transmitter has been switched off or is out of range), the receiver again scans until another
valid signal is received.
Pitch-and-Catch (Optional):Pitch-and-Catch is similar to First-Come First-Serve, but it adds the safety
requirement that the operator in control must release or ‘pitch’ the control before another operator may assume
control. It also allows control transfer from one operator to another without pausing operation. Once the
transmitter has taken control of the receiver, the pitch button is the only way to release control of the receiver so
that other transmitters can take control. Once the receiver receives a valid pitch command, the receiver then looks
for the next programmed ID code. A ‘catch’is made when the ID code from the next transmitter is recognized. If a
catch is not made within a preset time period, the receiver will revert to First-Come First-Serve until a valid ID
code is recognized. Any switch can be programmed as the pitch button.
Note: If a transmitter malfunctions after the receiver has taken control, the only way to release the receiver is
to cycle power to the receiver.
A-B Switch (Optional): Selector switches can be provided to control more than one similar function with the
same controls (i.e., controlling trolley/hoist A, trolley/hoist B, or both A and B simultaneously). On the handheld
transmitters, a single pushbutton cycles between A, B, Both, and OFF each time the button is pressed. LED
indicators show the control status.

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Key Switch (Optional):The key switch option can prevent the use of the transmitter by unauthorized personnel.
The key switch is electrically connected between the battery and the electronics so that all power is removed
when the switch is in the OFF position.
Note: Once power is applied, the red LED illuminates and the transmitter performs a self-test procedure
lasting approximately three seconds. The transmitter may be switched to ‘ON’. Under standard
operating conditions, the LED flashes green once when the transmitter switches to ‘ON’.
Magnet Control (Optional): An additional safety feature is built into systems that use a lifting magnet. The two-
button design uses one button labeled MAG LIFT (or LIFT) and one button labeled MAG DROP (or DROP).
Pressing the LIFT button energizes the magnet. Pressing LIFT and DROP at the same time de-energizes the
magnet and drops the load. A time-delay is built into the circuit, so the buttons must be held for nearly one second
before the magnetic controls activate.
An additional switch may be provided for fanning or dribbling the load. Pressing the button labeled FAN or MAG
FAN while pressing MAG LIFT activates the fan drop function. Again, a time-delay is built into the circuit, so these
buttons must be held down for nearly one second before the magnetic controls activate.
Multiple Receivers Controlled by Multiple Transmitters Option: One transmitter can control a maximum of six
receivers with a rotary selector switch. A rotary switch is often used to select a particular hoist/trolley A/both/B. It
can also be used for crane select, i.e., East/West.

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5.6 Status Indicators
5.6.1 Status LED
The status LED indicates the transmitter operation. When the transmitter is operating normally, the LED indicator
emits short flashes at a low rate when no commands activate, and at a higher rate when a command activates.
Some transmitters use a red LED only. Others use a multicolored LED that flashes GREEN when no problems
are present and changes to RED when problems are encountered. See the Status Chart below.
Table 1: Transmitter Status Chart
LED Indication
Possible Cause
LED is off
Transmitter is off –switch transmitter ON
Batteries are dead –replace batteries
Transmitter failure –contact Cattron at www.cattron.com/contact for
service
LED flashes at low rate
Transmitter is operating in a normal mode
LED flashes at high rate
Command Switch is pressed
LED flashes Red/Green (‘A’ series
only)
Batteries getting low –change batteries at the next convenient
opportunity
LED flashes on-off at a slow rate
(½ second on and ½ second off)
Batteries getting low –change batteries at the next convenient
opportunity
LED remains on continuously (LED
might flicker slightly)
A switch was activated at the time the transmitter was switched on, or a
general failure occurred that requires factory service. Ensure no other
switches are pressed while attempting to switch the transmitter on
LED will not light when ON/OFF
button is pushed
Replace batteries. If this does not correct the problem, the transmitter
must be repaired
5.6.2 Function Select LEDs
Two LEDs are used on some transmitters to indicate which control functions are active (such as hoist trolley A or
hoist trolley B; these are commonly used with pilot relays). When both are illuminated, both controls are active.
When both LEDs go out, neither control is active.

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6. Installation
6.1 General
Check all the components to confirm that they are the components you ordered for your system and that they are
in good condition. If any components are missing, or if any are not in good condition, contact Cattron at
www.cattron.com/contact .
WARNING
READ ALL INSTRUCTIONS. Failure to follow the SAFETY RULES can result in serious personal
injury. Before starting this installation, ensure that the crane power has been disconnected and
that all applicable safety precautions are followed.
6.2 Locating the Equipment
6.2.1 Antenna Location
The antenna is one of the most important components of a radio receiving system. Proper placement of the
receiver antenna ensures reliable operation under the most severe conditions. A direct ‘line-of-sight’ path between
the transmitter and receiver antenna provides the best performance (refer to Figure 3).
Controlled range systems require a special flat panel antenna. Refer to Installation Procedure - SAFE-T-RANGE
(21R22CR) for special considerations for the antenna used with that system.
Figure 3: Transmitter/Receiver Communication
In most cases, the antenna may be mounted directly on the receiver cabinet. In determining the mounting
location, consider the following items:
•Mount the antenna vertically
•For optimum performance, give the antenna itself a minimum of 8 inches clearance in all directions,
excluding the wall or plate to which the receiver cabinet is mounted (refer to Figure 4)
•If the receiver cabinet location cannot provide this clearance and the antenna must be mounted at a
remote location, the Cattron Remote Antenna Mounting Kit should be used. See Receiver Spare Parts
List or contact Cattron at www.cattron.com/contact for more information
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Figure 4: Antenna Clearance
6.2.2 Receiver Location
To ensure safe and reliable system operation, the following items must be considered when selecting a location
for mounting the receiver:
•Install the receiver in an environment where the ambient temperature during operation does not drop
below -20º F (-28º C) or rise above +160º F (+71º C)
•All connections to the receiver enclosure must be watertight
•Avoid mounting the receiver enclosure on a surface where excessive vibration or shock is present
•For easy access to wiring and for service, provide sufficient room to open the enclosure door
•To ensure that the receiver enclosure is electrically at earth ground, remove all paint from the mounting-
hole surfaces (refer to Figure 5)
Figure 5: Mounting-Hole Paint Removal
•Mount the receiver enclosure securely using appropriate locking-type hardware. This also assists in
properly grounding the receiver enclosure to the mounting surface

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6.3 Installation Wiring
Referring to the configuration sheet provided with the receiver (usually located within the receiver door), dress the
receiver output relay wiring and the control switch wiring along the inside wall of the enclosure. This allows for
easy troubleshooting and maintenance.
6.3.1 Receiver Power
Cattron receivers are normally prewired for the most widely used control systems. Specific installations may
require rewiring the relay ‘commons’. When connecting the Cattron receiver assembly to a power source that has
large amounts of interference (noise) generated by motors and/or contactors, use noise suppression devices
(snubbers) to prevent noise from triggering the receiver’s safety shutdown programming.
Never use the receiver case as a ground for other electrical equipment.
6.3.2 Relay Outputs
Limit the load current applied to the output relay bank ‘common’ to a maximum of 10 A.
CAUTION
Connection to equipment or contactors with higher voltage or current requirements requires an
intermediate relay.
6.3.3 Output Snubbers
Snubbers are needed to suppress the noise generated from arcing relay contacts. When a contactor opens, the
contactor coil produces a large voltage potential, much like automotive ignition systems. When the points open on
automotive ignition systems, the coil sends a large voltage to the distributor which jumps across the spark plug
(called arcing). The result is a large amount of noise generated in the system.
A snubber is a device designed to reduce arcing (noise). Cattron uses a resistor-capacitor combination to
accomplish this function. To prevent noise entering the receiver, it is recommended that all contactors have
snubbers installed directly across the coils. If more snubbers are needed, see the Receiver Spare Parts List or
contact Cattron at www.cattron.com/contact .
6.4 Installation Procedure –21R14A Receiver
Refer to Figure 6 and Figure 7.
6.4.1 Power/Control Wiring
The transfer switch is wired so that the crane’s Main Line Contactor (MLC) is controlled by the radio MLC relay
when it is in the radio position and by the pendant controls when the switch is in the pendant position. Refer to
Figure 7 (21R14A) for typical input control wiring for overhead cranes. Transfer switch wiring is not required
unless there is a need for pendant operation. The switch can normally be wired without removing it from the
receiver cabinet. Any unused switch poles can be used for isolating additional functions.
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