Dynamic DX-ECU User manual

No. 64227, Issue 3. August 1998
TM
DX Environmental Control Unit
(Part No. DX-ECU)
Installation Manual
Order/Part Number for this Manual : GBK64227 issue 3
Important Notes
1. Read this Manual carefully before installing or operating your DX control system.
2. Due to continuous product improvement Dynamic reserves the right to update this Manual.
This manual supersedes all previous issues which must not continue to be used.
3. Any attempt to gain access to or in any way abuse the electronic components and associated
assemblies that make up the wheelchair control system renders the Manufacturer’s Warranty void
and the Manufacturer free from liability.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998
CONTENTS
1Introduction ................................1
2Product Description ...........................2
3Installation ................................3
Electromagnetic Compatibility (EMC) ..........................3
General .................................................4
Mounting ................................................4
Environmental Protection ..............................4
Securing the ECU ....................................5
ECU Connection to the DX System ............................7
Environmental Control Connections ...........................7
DB9 Connector ......................................7
Molex Connector .....................................8
4Maintenance ...............................9
5Safety and Misuse Warnings ....................10
Disclaimer ..............................................11
6Warranty .................................12
7Sales and Service Information ..................13

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998 1
1INTRODUCTION
ADX based wheelchair control system may comprise between two and sixteen DX
compatiblemodulesdependingontheapplication.EachDXcompatiblemodulehas
its own Installation Manual which describes the installation requirements of that
particular module.
This Manual describes the installation of the Environmental Control Unit (ECU)
only and should be read in conjunction with the:
•DX Specialty Controls Remote (SCR) Installation Manual
•Installation Manuals for all other DX Modules to be used in your system.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998
2
2PRODUCT DESCRIPTION
Asingle ECU, being basically an adaptor module, allows from one to eight input
devices to be controlled, and with a possibility of two ECU modules being
incorporated into a single DX system, a total of 16 input devices could be utilized.
Input devices are connected to the ECU by way of a DB9 plug and are controlled,
via the SCR, by any DX compatible input device. A 2-pin Molex socket is used to
select between ECU1 and ECU2 (see pages 7 & 8 for connections).
Note : An ECU can only be used in conjunction with an SCR.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998 3
3INSTALLATION
Electromagnetic Compatibility (EMC)
Dynamic Electronic Controllers have been tested on typical vehicles to confirn
compliance with the following appropriate EMC standards:
Emissions: CISPR22, class B
Susceptibility: IEC1000-4-3
ESD: IEC1000-4-2
Compliance levels and set-up as per ISO 7176, part 21.
National and international directives require confirmation of compliance on
particular vehicles. Since EMC is dependant on the particular installation, each
variation must be tested. The guidelines in this section are written to assist with
meeting EMC requirements.
Minimising Emissions
Motors : Motor brushes generate electromagnetic emissions. It may be
necessary to fit capacitors between the brush holders and the motor
case. Ensure the leads are kept as short as possible.
A suitable capacitor is 4n7, 250V Ceramic.
Wiring : Keep wire lengths as short as practical for a tidy layout.
Minimise any wire loops, particularly loops of single wires as opposed
to wire pairs.
Endeavour to run wires in pairs or bunches.
Where practical, attach cables to the wheelchair frame.
Immunity to Radiated Fields
Follow the wiring recommendations for minimising emissions.
Immunity to ESD
Follow the wiring recommendations for minimising emissions.
Ensure all vehicle sub-frames are electrically connected.
Ensure any metal casing on speed setting potentiometers is electrically
connected to the vehicle frame.
Do not leave connections unnecessarily exposed.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998
4
Recommended Mounting Orientation
General
Installing an ECU requires the following steps:
1. Mounting and securing the ECU
2. Connecting the ECU to the rest of the DX system
3. Connecting devices to the ECU
Mounting
Environmental Protection
Maximum environmental protection is achieved when the ECU is mounted with the
connectors facing down as shown.
Note : The ECU is not inherently water proof and must be protected from water
ingress as appropriate to chair usage and mounting considerations.
Typically water proofing is achieved by a sensible choice of mounting
position and / or addition of a water shielding cover.
The ECU should be mounted in a position that is not exposed to
mechanical abuse.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998 5
PlastiteScrews(x2)
M3x10
GSC0170
DXAux.Mod.Mounting
Bracket(on ECU)
Round Mounting
Tube (18 -24 mm Ø)
DXAux.Mod.Tube
ClampB:GME60527)
DXAux.Mod.Tube
ClampA:GME60526
PlastiteScrews(x2)
Tubes18 -21 mmØ:GSC0175
T
u
b
e
s
2
1
-
2
4
m
m
Ø
:
G
S
C
0
1
8
0
SquareMounting
Bracket
(18 -24 mm²)
DXAux.Mod.Lock
(GME60525)
(supplied withECU)
Securing the ECU
The ECU is supplied fitted with a DX Auxiliary Module Mounting Bracket. This
allows the ECU to be chassis mounted, tube mounted, or mounted to another DX
Auxiliary Module as follows:
Round or Square Tube Mounting
Chassis Mounting

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998
6
M5x12 CSK (x2)
GSC0053
DXAux.Mod.Mounting
Bracket(on ECU)
DXAux.Mod.
Lock GME60525
(
(
s
s
u
u
p
p
p
p
l
l
i
i
e
e
d
d
w
w
i
i
t
t
h
h
E
E
C
C
U
U
)
)
AnotherDXAuxiliaryModule
Mounting on other Auxiliary Modules

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998 7
DXBUS
connectors
Molex
SocketDB9 Plug
Figure 6 - ECU DB9 Connections
ECU Connection to the DX System
The ECU can be connected to any other DX
Module existing in the DX system by way of the
two DXBUS connectors.
Environmental Control Connections
DB9 Connector
Any Environmental Control Device (ECD, an
input device that in some way effects your
surroundings) can be connected into your DX
system by way of the DB9 plug on the ECU
panel of connectors.
Connect your input device(s), as shown in
Figure 6, using a female DB9 socket.
Warning : The switch contacts in the ECU are rated for 24V, 1A operation only.
The DB9 common contact is rated for 2A only. Do not exceed these
ratings in operation. In particular, do not connect the ECU to AC
mains.
For sample Mouse Mover connection to the ECU, see Figures 7 & 8.
1 2 9876 543
Up
DownLeftRight
LeftClick
Common
Figure 7 - ECU DB9 Connections
(mouse)
ECD1
ECD6
ECD4
ECD3
ECD2
ECU
Common
Up
Down
Left
Right
LeftClick
Mouse
Mover
+9V
Figure 8 - Mouse Mover Connections

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998
8
Molex Connector
Amaximum of two ECU Modules can be connected into any DX system. These are
nominally labelled ECU1 and ECU2. In order for the SCR to determine which
Module is ECU1 or ECU2, the Molex socket is used.
Supplied with the ECU is a Molex plug which, when fitted into the Molex socket,
will effectively tell the SCR that it is ECU2.
When the DX System is powered up, the ECU(s) is designated an ID (ECU1 or 2
depending whether the Molex plug is inserted) and the relevant LED is lit.
Note : Care should be taken when looming for the ECU and other DX
modules that wires can not be transposed.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998 9
4MAINTENANCE
•The DX System should be regularly checked for integrity. Loose, damaged
or corroded connectors or terminals, or damaged cabling should be replaced.
•All switchable functions on the DX System should be regularly tested to
ensure they function correctly.
•All DX System components should be kept free of dust, dirt and liquids. If
necessary wipe with a cloth dampened with warn water or alcohol. Do not
use solvents or abrasive cleaners.
•Where any doubt exists, consult your nearest Service Centre or Agent.
•There are no user-serviceable parts in any DX System component - do not
attempt to open any case.
Warning : If any DX component is damaged in any way, or if internal damage
may have occurred (for example by being dropped), have it checked
by qualified personnel before operating.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998
10
5SAFETY AND MISUSE WARNINGS
Do not install, maintain or operate this equipment without reading, understanding
and following the proper instructions and manuals, otherwise injury or damage may
result.
The completed installation must be thoroughly checked, and all programmable
options must be correctly adjusted for safe operation prior to use.
Awarning must be conveyed to the wheelchair operator that the controller could
cause the chair to come to a sudden stop. In situations where this may affect the
safety of the user, this will require the fitting and wearing of a seat belt.
Performance adjustments should only be made by professionals of the health care
field or persons fully conversant with this process and the drivers capabilities.
Incorrect settings could cause injury to the driver, bystanders, damage to the chair
and surrounding property.
After the wheelchair has been set up, check to make sure that the wheelchair
performs to the specifications entered in the programming procedure. If the
wheelchair does not perform to specifications, turn the wheelchair off immediately
and re-program. Repeat procedure until the wheelchair performs to specifications.
Do not operate the DX System if it behaves erratically, or shows abnormal
response, heating, smoke or arcing. Turn the system off, disconnect the battery or
open the battery overload switch, and consult your Service Agent.
Do not operate your DX System if the battery is nearly flat as a dangerous situation
may result due to loss of power in an inopportune place.
Ensure the controller is turned off when not in use.
No connector pins should be touched, as contamination or damage due to
electrostatic discharge may result.
Most electronic equipment is influenced by Radio Frequency Interference (RFI).
Caution should be exercised with regard to the use of portable communications
equipment in the area around such equipment. While the manufacturer has made
every effort to ensure that RFI does not cause problems, very strong signals could
still cause a problem. If RFI causes erratic behaviour, shut the wheelchair off
immediately. Leave off while transmission is in progress.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998 11
In the event of a fault indicator flashing while driving (battery gauge and/or Status
LED), the user must ensure that the system is behaving normally. If not, the system
must be turned off and a service agent contacted.
The switch contacts in the ECU are rated for 24V, 1A operation only. The DB9
common contact is rated for 2A only. Do not exceed these ratings in operation. In
particular, do not connect the ECU to AC mains.
Report any malfunctions immediately to your Service Agent.
Disclaimer
Dynamic Controls Ltd. products built today allow our customers’ vehicles to
conform to national and international requirements. In particular to:
ISO7176, part 9 -Climatic Tests for Electric Wheelchair;
ISO7176, part 14 -Power and Control Systems for Electric
Wheelchairs;
ISO7176, part 21 -Requirements and Test Methods for
Electromagnetic Compatibility of Electric
Powered Wheelchairs and Scooters
However, the performance of controllers fitted to wheelchairs and scooters is very
dependant on the design of the wheelchair so final compliance must be obtained by
the vehicle manufacturer for their particular vehicle. No component compliance
certificate issued by Dynamic Controls Ltd. relieves a wheelchair / scooter
manufacturer from compliance testing their particular vehicles.
If Dynamic Controls Ltd. controllers are fitted to vehicles or applications other than
wheelchairs or scooters, testing to appropriate standards for the particular
application must be completed as ISO7176 may be inappropriate.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998
12
6WARRANTY
All equipment supplied by Dynamic Controls Ltd is warranted by the company to
be free from faulty materials or workmanship. If any defect is found within the
warranty period, the company will repair the equipment, or at its discretion, replace
the equipment without charge for materials and labour.
The Warranty is subject to the provisions that the equipment:
!Has been correctly installed.
!Has been used solely in accordance with this manual.
!Has been properly connected to a suitable power supply in accordance with
this manual.
!Has not been subjected to misuse or accident, or been modified or repaired
by any person other than someone authorised by Dynamic Controls Ltd.
!Has been used solely for the driving of electrically powered wheelchairs in
accordance with the wheelchair manufacturer's recommendations.

GBK64227 - Issue 3 : August 1998
© Copyright Dynamic Controls Ltd. 1998 13
7SALES AND SERVICE INFORMATION
For Sales and Service advice, or in case of any difficulty, please contact:
Head Office
Dynamic Controls Limited Telephone: Int. 64 3 338 0016
Print Place Fax: Int. 64 3 338 3283
Christchurch
New Zealand
Australia
Electronic Mobile Service (EMS) Tel. 24 hr: Int. 61 2 9887 2824
46 Berripa Close Pager: Int. 61 2 9963 1778
North Ryde, Sydney Fax: Int. 61 2 9887 2114
NSW Australia 2113
North America
Rosstron Inc Telephone: Int. 1 310 539 6293
1521 W. 259th St Fax: Int. 1 310 539 4078
Harbor City, CA 90710
USA
Europe
Controls Dynamic Ltd Telephone: Int. 44 1562 820 055
Lisle Avenue Fax: Int. 44 1562 742 720
Kidderminster
DY11 7DL
United Kingdom
Note : The controller should be clearly labelled with the manufacturer's service
agent's telephone number.