© 2016 Littelfuse Protection Relays & Controls
Time Delay Relays
Dedicated - HVAC
www.littelfuse.com/tl
Rev: 1-A-062316
TL SERIES
Lockout
Wiring Diagram
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.
Features & Benefits
FEATURES BENEFITS
Lockout delay
Prevents rapid cycling of compressor and eliminates
nuisance service calls due to blown fuse or tripped
breaker by locked rotor during short cycling.
One second
Delay-on-Make
(models ending in T)
Eliminates contactor chatter due to
thermostat bounce
Totally solid state
and encapsulated
No moving parts to arc and wear out over time and
encapsulated to protect against shock, vibration,
and humidity
1A steady, 10A inrush,
solid state output
Provides 100 million operations in typical conditions
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.
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.
Ordering Information
MODEL INPUT VOLTAGE LOCKOUT TIME DELAY-ON-MAKE
TL120A5T
120VAC
5m 1s
TL230A5
230VAC
5m No delay
TL24A5T
24VAC
5m 1s
If you don’t find the part you need, call us for a custom product 800-843-8848
V = Voltage
S1 = Initiate Switch
CR = Compressor or
Control Relay
