Time Delay Relays
Dedicated - Interval
TSD7 SERIES
Interval/Delay-on-Break Timer
Description
The TSD7 Series utilizes only two terminals connected in series
with the load. Interval timing mode period is achieved by using a
small portion of the AC sine wave allowing sufficient voltage for
circuit operation. It can be used as an interval timer to control or
pulse shape the operation of contactors, solenoids, relays, and
lamp loads. The TSD7 Series can be wired to delay on the break
of a switch for energy saving fan delays.
Operation (Interval)
Upon application of input voltage, the output energizes and the
time delay begins. The output remains energized throughout the
time delay. At the end of the time delay, the output de-energizes
and remains de-energized until power is removed.
Wiring Diagram
L1
N/L2
Reset:
Removing input voltage resets the time delay and
the output.
Operation (Delay-on-Break)
Upon closure of SW1, the load is energized and the timer is
reset (zero volts across its input terminals). Opening SW1 re-
applies input voltage to the timer, the load remains energized
and the time delay begins. At the end of the time delay, the
output de-energizes. If SW1 is open when power is applied, the
load will energize for the time delay then de-energize.
Reset:
Reclosing SW1 resets the timer.
Interval
Features & Benefits
FEATURES
Microcontroller based
Delay-on- Break
BENEFITS
Repeat Accuracy + / - 0.5%,
+ / -1% time delay accuracy
Rated to 75°C operating temperature to withstand
high heat applications
Allows flexiblility for OEM applications
Provides 100 million operations in typical conditions.
No moving parts to arc and wear out over time and
encapsulated to protect against shock, vibration,
and humidity
Provides quick and easy installation for new or
existing systems
Extended
temperature range
Compact, low
cost design
1A steady solid-state
output, 10A inrush
Totally solid state
and encapsulated
Two terminal series
load connections
V = Voltage
L = Load
S1 = Initiate Switch
R
T
is used when external
adjustment is ordered.
Ordering Information
MODEL
INPUT VOLTAGE
ADJUSTMENT
TIME DELAY
MODEL
INPUT VOLTAGE
ADJUSTMENT
TIME DELAY
TSD7412S
TSD7414M
TSD7421
TSD7423
TSD7424
120VAC
120VAC
120VAC
120VAC
120VAC
Fixed
Fixed
External
External
External
2s
4m
1 - 100s
0.1 - 10m
1 - 100m
TSD761120S
TSD761180S
TSD7611S
TSD7621
230VAC
230VAC
230VAC
230VAC
Fixed
Fixed
Fixed
External
120s
180s
1s
1 - 100s
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/tsd7
Rev: 1-A-061016
Time Delay Relays
Dedicated - Interval
TSD7 SERIES
Accessories
P1004-13, P1004-13-X Versa-Pot
Panel mountable, industrial potentiometer
recommended for remote time delay adjustment.
P1023-6 Mounting bracket
The 90° orientation of mounting slots makes
installation/removal of modules quick and easy.
P0700-7 Versa-Knob
Designed for 0.25 in (6.35 mm) shaft of
Versa-Pot. Semi-gloss industrial black finish.
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.
VTP(X)(X) Plug-on Adjustment Module
Mounts on modules with in-line adjustment
terminals. Rated at 0.25W at 55°C. Available in
resistance values from 5KΩ to 5MΩ.
Selection Table for VTP Plug-on Adjustment Accessory
Time Delay
1
- 1-100s
2
- 10-1000s
3
- 0.1-10m
VTP P/N
VTP5G
VTP5K
VTP5N
Time Delay
4
- 1-100m
5
- 10-1000m
VTP P/N
VTP5P
VTP5R
Specifications
Time Delay
Type
Range
Repeat Accuracy
Tolerance
(Factory Calibration)
Recycle Time
Time Delay vs Temp.
& Voltage
Input
Voltage
Tolerance
AC Line Frequency
Output
Type
Form
Maximum Load Current
Minimum Load Current
Effective Voltage Drop
(VLine-VLoad)
Digital integrated circuitry
1s - 1000m in 5 adjustable ranges or fixed
±0.5% or 20ms, whichever is greater
≤ ±10%
≤ 400ms
≤ ±2%
24, 120, or 230VAC
±20%
50/60 Hz
Solid state
NO, closed during timing
1A steady state, 10A inrush at 45°C
40mA
Input
24VAC
120VAC
230VAC
Effective Drop
3V
4V
6V
Protection
Circuitry
Dielectric Breakdown
Insulation Resistance
Mechanical
Mounting
Dimensions
Termination
Environmental
Operating/Storage
Temperature
Humidity
Weight
Encapsulated
≥ 2000V RMS terminals to mounting surface
≥ 100 MΩ
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 75°C / -40° to 85°C
95% relative, non-condensing
≅
2.4 oz (68 g)
Function Diagrams
INTERVAL (IMPULSE-ON)
Selection Guide
DELAY-ON-BREAK
L
V = Voltage
NO = Normally
Open Contact
NC = Normally
V = Voltage
Closed Contact
S1 =Initiate Switch
TD = Time Delay
NO = Normally Open
R = Reset
Contact
= Undefined
NC = Normally Closed
Time
Contact
O = Output
LS1 Load
= = Initiate Switch
O = Output
TD = Time Delay
L = Load
R = Reset
TD == Undefined Time
Time Delay
R = Reset
= Undefined
Time
Rev: 1-A-061016
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/tsd7
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