SSAC TA Series Data Sheet

Lockout Timer

Dedicated

timers

Lockout Delay--Prevents
Rapid Recycling of a
Compressor

Low Voltage Brownout
Protection

Circuitry to Activate the
Cooling Anticipator (24 V AC
Models)

Eliminates Nuisance Service
Calls Due to Blown Fuse or
Tripped Breakers

TA Series
HVAC/R Timer

Description

The TA Series prevents rapid recycling of a compressor. A lockout delay is started when the thermostat
opens, or input voltage is lost. Eliminates tripped circuit breakers or blown fuses caused by a locked rotor
during short cycling. The TA will not allow the compressor to start when the line voltage is low. Chatter of
the compressor relay is eliminated. Because of the fast initiate time, bounce of the thermostat will not be
transmitted to the compressor relay coil. A 30 second delay provides anti-reversing protection for scroll
compressors.

Operation

On initial closure of the S1, the compressor relay
energizes immediately. When S1 opens or input voltage
is interrupted, a lockout time delay is initiated. During
this lockout time delay, the compressor relay cannot
be energized. The low voltage (brownout) protection
prevents energization of the compressor when the line
voltage is low.

Reset: The lockout time delay cannot be reset.

Function

V = Voltage S1 = Initiate Switch or Thermostat
L = Load (CR) E = Ready R = Reset
TD = Time Delay

Approvals:

(24 V AC only)

Connection

Accessories

Female quick connect
P/N:

P1015-64

(AWG 14/16)

Quick connect to
screw adaptor
P/N: P1015-18

Mounting bracket
P/N: P1023-6

DIN rail P/Ns:

017322005 (Steel)
C103PM (Al)

←

→

DIN rail adaptor
P/N: P1023-20

See accessory pages for
speci cations.

5.166 Low Voltage Products & Systems

1TRC 001 009 C0202 ABB Inc. • 888-385-1221 • Technical assistance 800-377-7722 • www.ssac.com

Dashed lines are internal connections.

S1 = Initiate Switch, Contact, or Thermostat
CR = Compressor Relay (Load) CA = Optional Cooling Anticipator

Ordering Table

24 V AC
24 V AC
24 V AC
24 V AC
12 V DC
24 V DC
24 V DC
24 V DC
24 V DC

30 s
2 m
3 m
5 m
1 m
30 s
2 m
3 m
5 m

Part NumberInput Time Delay

T

A24A0.5
TA24A2
TA24A3
TA24A5
TA12D1
TA24D0.5
TA24D2
TA24D3
TA24D5

TA002B01 01.05.05

Lockout Timer

TA Series
HVAC/R Timer

Technical Data

Input

Voltage/Frequency 12 or 24 V DC; 24 V AC, 50 ... 60 Hz
Impedance 450 Ω (anticipator by-pass)

Output

Minimum Load Current 75 mA
Maximum Load Current 1 A at 60°C
V

oltage Drop ≤ 1.25 V

Time Delay

Initiate Time ≅ 16 ms
Lockout Time Fixed 0.5, 1, 2, 3, or 5 m
Tolerance -15% ... +35%

Protection

Circuitry Encapsulated
Low Voltage Protection ≅ 20 V: 24 V AC/DC; ≅ 9 V: 12 V DC
Dielectric Breakdown ≥ 2000 V RMS terminals to mounting surface
Insulation Resistance ≥ 100 MΩ

Mechanical

Mounting Surface mount with one #10 (M5 x 0.8) screw
Package 2 x 2 x 1.21 in. (50.8 x 50.8 x 30.7 mm)
Termination 0.25 in. (6.35 mm) male quick connect terminals

Environmental

Operating Temperature -40°C ... +70°C
Storage Temperature -40°C ... +85°C
Humidity 95% relative, non-condensing
Weight ≅ 2.4 oz (68 g)

Thermostat

Cooling Anticipator Resistor ≥ 1800 Ω

Dedicated

timers

Mechanical View

Inches (Millimeters)

TA002B01 01.05.05

Low Voltage Products & Systems 5.167

ABB Inc. • 888-385-1221 • Technical assistance 800-377-7722 • www.ssac.com 1TRC 001 009 C0202