The 40AA, 41AA, and 42AA series

electronic motor protection modules

combine high performance and function

consolidation in order to provide reliable,

cost effective protection for your motor

needs. Used with Positive Temperature

Coefficient (PTC) sensors the

40/41/42AA modules protect against

locked rotor conditions, running overload

and high ambient temperature. The

innovative design offers additional

functions as well, such as minimum off

time delay, low voltage cutout and

bearing temperature protection. Also the

device is very safe and easy to calibrate

for voltage (no jumper is required).

Thermal protection is achieved by

monitoring the temperature of the motor

windings with PTC sensors. These

sensors can be the Klixon BA series or

any other compatible PTC sensor rated

Mark A or B. If the windings exceed the

rated trip temperature the sensor

undergoes a rapid change in resistance

relative to the change in temperature. As

a result of this change, the 40/41/42AA

modules' internal relays de-energize the

control coil of the external line break

contactor.

As the motor cools and acceptable motor

winding temperatures have been restored

the sensor resistance decreases to the

reset level. At this point the module will

reset itself automatically unless it was

set up for manual reset. In this case the

user is required to remove power from

the system for a minimum of 5 seconds.

The 40/41/42AA series modules are

Product Overview

ideal for many applications in the

HVAC/R industry as well as for industrial

systems. Some applications include

global commercial rooftop A/C, global

chiller applications, industrial pumps,

material handlers, elevators, escalators,

air compressors and industrial systems.

Product Specifications

General Specifications

Units

Min.

Typical

Maximum

None

Yes

None

Yes

None

Automatic

Manual

Automatic

Manual

Automatic

Manual

Automatic

Number

Channels

Line

Voltage

Sensor

Type

Time

Delay

Low

Voltage

Auto/Man

Reset

40AA110E

40AA115E

41AA1105A

41AA1500E

41AA1600A

41AA1600E

41AA1606E

42AA100E

40AA100E

40AA300E

41AA1504E

40AA200E

40AA100A

40AA200A

40AA102A

120/240

24V

120/240

24V

Mark A

Mark B

None

5 min.

4 min.

None

2 min.

4 min.

None

4 min.

None

4min.

None

4 min.

None

Sensors/

Channels

Printed in U.S.A. 1

1/2003

Operating Temperature Range

Supply Voltage
24 or 115-230 (

�

15%)

Rated Line Frequency

Low Voltage Cut-Out Trip (24V Input)

Low Voltage Cut-In Reset

Low Voltage Cut-Out Trip (120V Input)

Low Voltage Cut-In Reset

Low Voltage Cut-Out Trip (240V Input)

Low Voltage Cut-In Reset

Max.

VAC

-40

79.5

160

50/60

170

+70

90.5

94.5

180

184

40/41/42AA Series

ELECTRONIC

MOTOR PROTECTION

Summary of Protection
Features

For further information write or call:

Texas Instruments Incorporated
34 Forest St., MS 2-3
Attleboro, MA 02703-0964
Phone: (508) 236-3617
Fax: (508) 236-1949

www.ti.com/snc/products/controls/motor-aa.htm

Protected Conditions

Envelope Drawing

Electrical Schematic

Thermal Motor Specification*

Specifications

40AA, 42AA Series

41AA Series

40AA, 42AA Series

41AA Series

40AA Single Channel Ratings (Series Sensors)
Sensor Trip Resistance
Sensor Reset Resistance
Sensor Resistance @ 25oC

41AA Three Channel Ratings (Parellel Sensors)
Sensor Trip Resistance
Sensor Reset Resistance
Sensor Resistance @ 25oC

42AA Single Channel Ratings (Series Sensors)
Sensor Trip Resistance
Sensor Reset Resistance
Sensor Resistance @ 25oC

Nominal Resistance
28.0 K

11.0 K

1.5 - 7.5 K

Nominal Resistance
14.0 K

3.25 K

0.5 - 2.5 K

Nominal Resistance
20.0 K

Manual Reset
1.5 - 7.5 K

*Resistance measurement with analog meter instrument on Mark B sensors.

� Locked Rotor

� Running Overload

� High Motor Ambient

� Blocked Ventilation

� Single Phasing

� Loss of Hermetic Compressor Charge

� Thermal overload of Windings

� Low Voltage Cutout

� Electrically - Isolated Power Supply

� Power Off Manual Resaet

� Automatic Reset with Minimum Off Delay
Timer

� UL File Number SA3745 (41AA)

� UL/CSA/CE pending on all other ratings

Supply Voltages........

Frequency..................

Control Circuit..........

Minimum
Permissible Load......

Maximum Load........

Cycle Life..................

Weight.........................

24VAC or
115-230 VAC (

�

15%)

50/60 Hz

2.5A, 600VA, 250V Max.

5VDC, 100mA

30VDC

250k Cycles Min.

290 Grams

40/41/42AA Series

ELECTRONIC

MOTOR PROTECTION

2x � .147 THRU

3.200

2.838

�

.019

.181

.225

2.550

�

.020

1.467

2.550

�

.020

6X .250 X .032 MALE QUICK CONNECT
TERMINAL TIN PLATED BRASS

2x � .147 THRU

3.200

2.838

�

.019

.181

.225

2.550

�

.020

1.467

2.550

�

.020

8X .250 X .032 MALE QUICK CONNECT
TERMINAL TIN PLATED BRASS

Important Notice: Texas Instruments (TI) reserves the right to
make changes to or discontinue any product or service identified
in this publication without notice. TI advises its customers to
obtain the latest version of the relevant information to verify,
before placing any orders, that the information being relied upon
is current. TI assumes no responsibility for infringements of
patents or rights of others based on TI applications assistance
or product specifications since TI does not possess full access
concerning the use or application of customers' products. TI
also assumes no responsibility for customers' product designs.

Printed in U.S.A. 1

1/2003

Электронный компонент: 40AA102A