Time Delay Relays
Dedicated - HVAC
TL SERIES
Lockout
Description
The TL Series provides protection against short cycling of a
compressor. At the end of each operation, or whenever power
is lost, a lockout delay is initiated. This lockout delay prevents
restarting of the compressor until the head pressure has
equalized. Compressor relay chatter due to thermostat bounce
is eliminated by use of optional one second delay-on-make. The
TL Series should not be used with cooling anticipator resistors
or solid-state switches. (See the TA Series).
Operation (Lockout)
Lockout:
On initial closure of S1, the compressor relay energizes
immediately (or after an optional 1s delay). When the S1 opens
or input voltage is interrupted, the output opens and remains
open for the lockout time delay. During this lockout time delay
period, the compressor relay cannot be re-energized.
Reset:
The lockout time delay cannot be reset. After the time
delay is completed, the unit automatically resets.
Wiring Diagram
L1
N/L2
Features & Benefits
FEATURES
Lockout delay
One second
Delay-on-Make
(models ending in T)
Totally solid state
and encapsulated
1A steady, 10A inrush,
solid state output
BENEFITS
Prevents rapid cycling of compressor and eliminates
nuisance service calls due to blown fuse or tripped
breaker by locked rotor during short cycling.
Eliminates contactor chatter due to
thermostat bounce
No moving parts to arc and wear out over time and
encapsulated to protect against shock, vibration,
and humidity
Provides 100 million operations in typical conditions
V = Voltage
S1 = Initiate Switch
CR = Compressor or
Control Relay
Accessories
P1023-6 Mounting bracket
The 90° orientation of mounting slots makes
installation/removal of modules quick and easy.
P1015-64
(AWG 14/16)
Female Quick Connect
These 0.25 in. (6.35 mm) female terminals are
constructed with an insulator barrel to provide
strain relief.
LOCKOUT TIME
DELAY-ON-MAKE
Ordering Information
MODEL
INPUT VOLTAGE
TL120A5T
TL230A5
TL24A5T
120VAC
230VAC
24VAC
5m
5m
5m
1s
No delay
1s
P1015-18 Quick Connect to Screw Adapter
Screw adapter terminal designed for use with
all modules with 0.25 in. (6.35 mm) male quick
connect terminals.
C103PM (AL) DIN Rail
35 mm aluminum DIN rail available in a 36 in.
(91.4 cm) length.
P1023-20 DIN Rail Adapter
Allows module to be mounted on a 35 mm DIN
type rail with two #10 screws.
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/tl
Rev: 1-A-062316
Time Delay Relays
Dedicated - HVAC
TL SERIES
Specifications
Input
Voltage
AC Line Frequency
Tolerance
Output
Minimum Load Current
Maximum Load Current
Inrush Current
Voltage Drop
Time Delay
Initiate Time
Lockout Time*
Tolerance
Option
Protection
Circuitry
Dielectric Breakdown
Insulation Resistance
24, 120, or 230VAC
50/60 Hz
±20%
≤ 40mA
1A @ 24VAC; 0.5A @ 120 & 230VAC at 60°C
10A at 60°C
24VAC - 2.5V @ 1A
120 & 230VAC - 4.2V @ 0.5A
≅
8ms
Fixed 2, 3, or 5m
-15% - 35%
1s delay-on-make eliminates contactor chatter
due to thermostat bounce
Encapsulated
≥ 2000V RMS terminals to mounting surface
≥ 100 MΩ
Mechanical
Mounting
Dimensions
Termination
Environmental
Operating/Storage
Temperature
Humidity
Weight
Surface mount with one #10 (M5 x 0.8) screw
H
50.8 mm (2”);
W
50.8 mm (2”);
D
30.7 mm (1.21”)
0.25 in. (6.35 mm) male quick connect terminals
-40° to 70°C / -40° to 85°C
95% relative, non-condensing
≅
2.4 oz (68 g)
*Power must be applied for at least 15 s to achieve a full lockout delay. Less than 15 s will result
in proportionally shorter delay periods.
NOTE:
Cooling anticipator resistor or leakage may cause erratic operation. See TA Series for use
with 24VAC systems that include anticipator resistors or use solid-state switches.
Function Diagram
LOCKOUT
E
L
V = Voltage
S1 = Initiate Switch
L = Load (CR)
E = Ready
TD = Time Delay
R = Reset
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/tl
Rev: 1-A-062316
MCU
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