SSAC THD7 Series Data Sheet

THD7 SeriesTimer - Interval/Delay-on-Break

L1 N/L2

Connection:

Interval

Delay-on­ Break

The THD7 utilizes only two terminals connected

in series with the load. Interval timing mode
is achieved by using a small portion of the AC
sine wave allowing sufficient voltage for circuit
operation. The THD7 can be used for interval or
delay-on-break timing. It is designed to operate
large loads directly, such as motors, heater
elements, and motor starters.

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.
Reset: Removing input voltage resets the time delay and
the output.

Operation (Delay-on-Break):

Upon closure of SW1, the load energizes and the timer is
reset (zero voltage 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.

For more information see:

Appendix A, pages 156-164 for function descriptions

and diagrams.

Appendix B, page 165, Figure 4 for dimensional drawing.

Features:

• Solid-state relay and timer combined

• Two terminal series connection to load

• Up to 20A steady state, 200A inrush

• Fixed or adjustable delays from

1s - 1000m

• ±0.5% repeat accuracy
Approvals:

Auxiliary Products:

• External adjust potentiometer:

P / N: P 10 04 - 13
P/N: P1004-13-X

• Mounting bracket: P/N: P1023-6

• Female quick connect:

P / N : P1 0 1 5 -1 3 ( AW G 1 0 /1 2 )
P / N : P1 0 1 5 -6 4 ( AW G 1 4 /1 6 )

• Quick connect to screw adaptor:

P/N: P1015-18

• DIN rail: P/N: C103PM (Al)

• DIN rail adaptor: P/N: P1023-20

• Versa-knob: P/N: P0700-7

• Plug-on adjustment module:

P/N: VTP(X)(X)

Time Delay VTP P/N

1 - 1-100s
2 - 10-1000s
3 - 0.1-10m
4 - 1-100m
5 - 10-1000m

Selection Table for VTP Plug-on
Adjustment Accessory.

VTP5G

VTP5K
VTP5N
VTP5P
VTP5R

V = Voltage
L = Load
S1 = Initiate Switch
RT is used when external adjustment is ordered.

Order Table:

THD7

X
Input Voltage

─2 - 24VAC
─4 - 120VAC
─6 - 230VAC

X

Adjustment

─1 - Fixed
─2 - External adjust

X

Time Delay*

─1 - 1 - 100s
─2 - 10 - 1000s
─3 - 0.1 - 10m
─4 - 1 - 100m
─5 - 10 - 1000m

Specifications

Time Delay

Type ..............................Digital integrated circuitry

Range .............................1s - 1000m in 5 adjustable ranges or fixed

Repeat Accuracy ...................±0.5% or 20ms, whichever is greater

Tolerance (Factory Calibration) .......≤ ±10%

Recycle Time .......................After timing: ≤150ms; During timing: ≤ 350ms

Time Delay vs Temp. & Voltage .......≤ ±2%

Input

Voltage ............................24, 120, or 230VAC

Tolerance ..........................±20%

AC Line Frequency .................50/60 Hz

Output

Type ..............................Solid state

Form ..............................NO, closed during timing

Rating Output Steady State Inrush**
A 6A 60A
B 10A 100A
C 20A 200A

Available Models:

THD72110SA
THD7415SB
THD7421C
THD7612MA
THD7621C

If desired part number is not listed, please call
us to see if it is technically possible to build.

X

Output Rating

─A - 6A
─B - 10A
─C - 20A

*If xed delay is selected, insert

delay (1 - 1000) followed by (S) sec.
or (0.1 - 1000)(M) min.

Effective Voltage Drop (VLine-VLoad) Input Effective Drop

24VAC ≤ 3V
120VAC ≤ 3V
230VAC ≤ 5V

Minimum Load Current .............100mA

Protection

Circuitry ..........................Encapsulated

Dielectric Breakdown ...............≥ 2000V RMS terminals to mounting surface

Insulation Resistance ................≥ 100 MΩ

Mechanical

Mounting ** .......................Surface mount with one #10 (M5 x 0.8) screw

Dimensions ........................2 x 2 x 1.51 in. (50.8 x 50.8 x 38.4 mm)

Termination ........................0.25 in. (6.35 mm) male quick connect terminals

Environmental

Operating / Storage Temperature .....-40° to 60°C / -40° to 85°C

Humidity ..........................95% relative, non-condensing

Weight ............................≅ 3.9 oz (111 g)

**Must be bolted to a metal surface using the included heat sink compound. The

maximum mounting surface temperature is 90°C. Inrush: Non-repetitive for 16ms.