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Page 3

Uni Instructions

Internal Features

Gain adjust

Acceleration (below)

Deceleration (top)

(on daughter board)

Reverse polarity protection relay

Heatsink/mounting block

B

Battery -

Motor -

Motor +

Input connector

top

wiper

Pot

min

batty

A

B
C

D

Relay resistor

Trickle resistor

B

A

Speed pot input is via a 4 pin connector, supplied.
Power & Motor connections are by means of 6.35 blade connectors, as shown.

Specifications - Uni-8

Supply voltage

12v or 24v or 36v or 48v

depends on model.

Supply current

30mA

at zero speed

Output voltage

0 to 100%

full speed, adjustable

Output current max (typ). 

115 amps

(100 amps regen)

1 minute rating

85 amps

without additional heatsink! 

2 minute  rating 

45 amps

without additional heatsink!

continuous 

30 amps or more: 

heatsink dependant

voltage drop at 20a

130mV

Overheat current

25 amps

typical 

Overheat temperature

95°C

on heatsink

Switching frequency 

20kHz approximately

Acceleration time 

330mSec to 7 Sec

(adjustable)

Deceleration time 

330mSec to 7 Sec

(adjustable)

Input 

4k7 to 25k pot or 0-3.5v

(adjustable)

3.5v on pot wiper (gain at max) for full speed

Pot fault detect

greater than 130% Full Speed

approx (if activated)

Size  

71mm x 71mm x 35mm

plus tags

 

case 

75mm x 75mm x 40mm

plus tags

 

base 

80mm x 100mm x 4mm

Weight board version  

110 gm

enclosed version 

210 gm

Summary of Contents for Uni Series

Page 1: ...trol applications They are used extensively by hobbyists and industry Amongst other applications our controllers have been successfully used in the following Camera dollies Caravan shifters Carnival floats Conveyors Electric boats Electric bicycles Electric wheelbarrows Factory stores vehicles Floor cleaning machines Golf caddies Kiddie cars Miniature railways 3 5 and 7 gauge Mountain rescue vehic...

Page 2: ...lso suggest you fit a motor suppression capacitor A 10n ceramic across the motor brushes as close to the motor as possible can greatly increase system reliability Some motors are available with this capacitor fitted as a manufacturing option Safety It is normal practise on passenger carrying vehicles to include some means of disconnecting the battery or motor in an emergency This is normally to gu...

Page 3: ...l speed adjustable Output current max typ 115 amps 100 amps regen 1 minute rating 85 amps without additional heatsink 2 minute rating 45 amps without additional heatsink continuous 30 amps or more heatsink dependant voltage drop at 20a 130mV Overheat current 25 amps typical Overheat temperature 95 C on heatsink Switching frequency 20kHz approximately Acceleration time 330mSec to 7 Sec adjustable D...

Page 4: ...inium or even copper Make sure the controller cannot get wet normally when mounted as shown and correctly covered water cannot get onto the circuit board and water on the base will do no harm Make sure water cannot run down the wires into the controller Heatsink mounting holes are tapped M3 and spaced at 25 4mm 1 The integral heatsink is isolated Mounting Connections The diagram shows the simplest...

Page 5: ...ections Controls The only external control the UNI needs is a speed pot shown in the diagram below left There are other controls that you may add if you wish The Uni turns itself off automatically when you turn the speed to zero so you can fit an on off switch in series with the red wire as shown in the diagram below right Opening this will remove the voltage from the pot so the controller will ru...

Page 6: ...d bare board controllers are supplied with a mating connector shown below This is an Insulation Displacement Connector IDC do not strip the insulation from the wires simply push them into the top part of the open connector from the knobbly side and squeeze it closed in a vice or with suitable parallel action pliers The mating connector supplied is suitable only for the correct size of wire Accepta...

Page 7: ...ng above Important use an insulated screwdriver when making adjustments the metal centres of the adjustments are live to the internal circuitry If a non insulated screwdriver touches anything other than a preset the circuit can be damaged Gain Adjust this so that at maximum required pot rotation the controller just reaches full speed This is easiest to do with the motor unloaded i e with the wheel...

Page 8: ...ically adjusts However running the controllers at full current will cause speedy heating However at some temperature well above 100 C the MOSFETs will become unsafe so we suggest that during initial use you keep a note of the heatsink temperature and if it becomes much too hot to touch take appropriate steps either by mounting the Uni onto additional heatsinking or better still fit a higher rated ...

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