www.curtisinstruments.com 1

Motor Controllers

Permanent Magnet Motor 

Speed Controller

Model 1212

Mobility System with

MyChair® Programmability

Mobility System
www.curtisinstruments.com 2

Permanent Magnet Motor Speed Controller

Model 1212

The Curtis Model 1212 Motor Speed Controller provides precise and smooth control 

of permanent magnet drive motors for battery powered vehicles.

Optimized for use on modern 3 or 4 wheel mobility aid scooters. However, the model 

1212’s programmable options also allow it to be used on any low power permanent 

magnet motor application.

FEATURES

Smooth and Secure Control 

▶ Advanced speed regulation maintains precise speed over 

varied terrain, obstacles, curbs and ramps.

▶ Linear cutback of current ensures smooth control, with 

no sudden loss of power during under-voltage or overtemperature.

▶ Optional speed limit potentiometer input provides direct 

and linear control over the maximum vehicle speed.

▶ Proprietary algorithms help prevent gearbox wear while 

providing smooth starts and reversals.

▶ The vehicle is brought to a complete halt before the 

electromagnetic brake is applied, ensuring safe and secure 

stopping under all conditions.

▶ Charger inhibit input prevents driving while charger is 

connected.

▶ Emergency Stop Decel function ensures a smooth “brake 

to stop” when the key is turned off or a fault occurs that 

requires the vehicle to stop.

▶ Anti-roll back/roll-forward function provides smooth and 

safe vehicle control on hills and ramps.

▶ Internal main contactor provides secure power-off.

▶ Boost current gives a brief boost of current greatly 

improving performance with transient loads such as starting 

on a hill, crossing thresholds, climbing obstacles, etc.

Easy Installation and Setup

▶ Industry standard footprint, mounting centers and wiring 

allows drop-in replacement of other controllers.

▶ The Model 1212 is easily programmed with Model 1311 

handheld or 1314 PC programmers, or can be supplied 

pre-programmed.

▶ Accepts all standard throttle types, including single-ended 

and center-off (wig-wag and unipolar).

▶ Simplified troubleshooting and diagnostics.

▶ Standard Mini-Fit Molex Jr. and Faston terminals provide 

proven, robust wiring connections.

Valuable Additional Features

▶ Optional Push-Switch input releases the brake and allows 

the motor to free-wheel.

▶ Push-too-Fast feature restricts vehicle speed even with the 

key off or with batteries disconnected.

▶ Automatically compensates for changes in motor condition 

to ensure optimum drive performance at all times.

▶ Multi-mode provides for two distinct and programmable 

control modes (indoor/outdoor modes).

▶ Power Saver function prevents the controller draining the 

battery when vehicle is inactive.

▶ Battery Discharge Indicator output.

▶ Optional Speed Inhibit input offers flexibility to reduce 

speed or prevent drive, e.g. when seat is lifted.

▶ Adjustable brake hold voltage reduces heating 

of the brake coil.

▶ Reverse Beeper function alerts bystanders.

▶ Electronics sealed to IPX5.
www.curtisinstruments.com 3

Permanent Magnet Motor Speed Controller

Model 1212

FEATURES continued

Robust Safety and Reliability

▶ High RF immunity prevents speed variation and 

shutdowns in noisy RF environments.

▶ Controller power circuits and microprocessor software 

are continuously monitored for proper operation.

▶ System start-up checks detect a defective throttle, 

brake, or associated wiring and disables drive.

MODEL CHART

Meets or complies with relevant 

US and International Regulations

The Curtis Model 1212 motor speed controller 

is designed to meet:

▶ EN 12184

▶ EN 55022

▶ IEC 61000-4

▶ FDA documentation filed

▶ TÜV Certification pending

▶ ISO7176-14

DIMENSIONS mm

Model Nominal Voltage (V) Drive Current

(Amps)

Peak Boost

Current (Amps)

Max. Boost Duration

(Seconds)

1212-22xx 24 45 55 10

1212-24xx 24 70 80 10

M1

131.0

72.0 38.6

M2 B- B+
www.curtisinstruments.com 4

Permanent Magnet Motor Speed Controller

Model 1212

TYPICAL WIRING DIAGRAM

PROGRAMMER

CURTIS 1212

J1 J2 J3 M1 M2 B- B+

MOTOR

100K SPEED LIMIT POT 5K THROTTLE POT

CIRCUIT BATTERY BREAKER

OPTIONAL

BRAKE SW

CHARGER

SOCKET FUSE

BB+

FUSE HORN

R

STATUS LED

KEY SWITCH

OPTIONAL MODE BRAKE

J1 J2 J3 J1 J2

J3

1:

2:

3:

4:

5:

6:

7:

8:

9:

10:

11:

12:

13:

14:

POT WIPER

PIN DESCRIPTION

POT HI

HORN

MODE

KSI

SPD INHIBIT

BATTERY +

POT LO

SPEED POT

STATUS

BDI

REVERSE

BATTERY -

PUSH

1:

2:

3:

4:

Rx

PIN DESCRIPTION

BATTERY -

Tx/CHARGE INHIBIT

BATTERY +

1:

2:

BRAKE +

PIN DESCRIPTION

BRAKE -

1311

1 2 3 4 5 6 7

8 9

1 2

3

1

10 11 12 13 14 4 2

1 2

3 4

Pin Description

1 Rx

2 Battery 

3 Tx/Charge Inhibit

4 Battery+

Pin Description

1 Brake +

2 Brake –

PROGRAMMER

CURTIS 1212

J1 J2 J3 M1 M2 B- B+

MOTOR

100K SPEED LIMIT POT 5K THROTTLE POT

CIRCUIT BATTERY BREAKER

OPTIONAL

BRAKE SW

CHARGER

SOCKET FUSE

BB+

FUSE HORN

R

STATUS LED

KEY SWITCH

OPTIONAL MODE BRAKE

J1 J2 J3 J1 J2

J3

1:

2:

3:

4:

5:

6:

7:

8:

9:

10:

11:

12:

13:

14:

POT WIPER

PIN DESCRIPTION

POT HI

HORN

MODE

KSI

SPD INHIBIT

BATTERY +

POT LO

SPEED POT

STATUS

BDI

REVERSE

BATTERY -

PUSH

1:

2:

3:

4:

Rx

PIN DESCRIPTION

BATTERY -

Tx/CHARGE INHIBIT

BATTERY +

1:

2:

BRAKE +

PIN DESCRIPTION

BRAKE -

1311

1 2 3 4 5 6 7

8 9

1 2

3

1

10 11 12 13 14 4 2

1 2

3 4

PROGRAMMER

CURTIS 1212

J1 J2 J3 M1 M2 B- B+

MOTOR

100K SPEED LIMIT POT 5K THROTTLE POT

CIRCUIT BATTERY BREAKER

OPTIONAL

BRAKE SW

CHARGER

SOCKET FUSE

BB+

FUSE HORN

R

STATUS LED

KEY SWITCH

OPTIONAL MODE BRAKE

J1 J2 J3 J1 J2

J3

1:

2:

3:

4:

5:

6:

7:

8:

9:

10:

11:

12:

13:

14:

POT WIPER

PIN DESCRIPTION

POT HI

HORN

MODE

KSI

SPD INHIBIT

BATTERY +

POT LO

SPEED POT

STATUS

BDI

REVERSE

BATTERY -

PUSH

1:

2:

3:

4:

Rx

PIN DESCRIPTION

BATTERY -

Tx/CHARGE INHIBIT

BATTERY +

1:

2:

BRAKE +

PIN DESCRIPTION

BRAKE -

1311

1 2 3 4 5 6 7

8 9

1 2

3

1

10 11 12 13 14 4 2

1 2

3 4

PROGRAMMER

CURTIS 1212

J1 J2 J3 M1 M2 B- B+

MOTOR

100K SPEED LIMIT POT 5K THROTTLE POT

CIRCUIT BATTERY BREAKER

OPTIONAL

BRAKE SW

CHARGER

SOCKET FUSE

BB+

FUSE HORN

R

STATUS LED

KEY SWITCH

OPTIONAL MODE BRAKE

J1 J2 J3 J1 J2

J3

1:

2:

3:

4:

5:

6:

7:

8:

9:

10:

11:

12:

13:

14:

POT WIPER

PIN DESCRIPTION

POT HI

HORN

MODE

KSI

SPD INHIBIT

BATTERY +

POT LO

SPEED POT

STATUS

BDI

REVERSE

BATTERY -

PUSH

1:

2:

3:

4:

Rx

PIN DESCRIPTION

BATTERY -

Tx/CHARGE INHIBIT

BATTERY +

1:

2:

BRAKE +

PIN DESCRIPTION

BRAKE -

1311

1 2 3 4 5 6 7

8 9

1 2

3

1

10 11 12 13 14 4 2

1 2

3 4

Pin Description

1 POT Wiper

2 POT Hi

3 Horn

4 Mode

5 KSI

6 SPD Inhibit

7 Battery +

8 POT Lo

9 Speed POT

10 Status

11 SDI

12 Reverse

13 Battery –

14 Push

J1

J2 J3

is a trademark of Curtis Instruments, Inc. Specifications subject to change without notice ©2016 Curtis Instruments, Inc. 50167 REV G 11/16

WARRANTY Two year limited warranty from time of delivery.