© 2016 Littelfuse Protection Relays & Controls
Time Delay Relays
Dedicated - Delay-on-Make
www.littelfuse.com/tdm-tdmh-tdml
Rev: 1-A-062116
TDM / TDMH / TDML SERIES
L1 N/L2
Delay-on-Make Timer
Description
The TDM/TDMH/TDML Series is a delay-on-make timer that
combines accurate digital circuitry with isolated, DPDT relay
contacts in an industry standard 8-pin plug-in package. DIP
switch adjustment allows precise selection of the time delay over
the full time delay range. The TDM/TDMH/TDML Series is the
product of choice for custom control panel and OEM designers.
Operation (Delay-on-Make)
Upon application of input voltage, the time delay begins. The
output is de-energized before and during the time delay. At the
end of the time delay, the output relay energizes and remains
energized until input voltage is removed.
Reset: Removing input voltage resets the time delay and output.
Features & Benefits
FEATURES BENEFITS
Wide delay range
(0.1s to 2.8h)
User selectable via DIP switches for fine tuning to
individual applications.
Microcontroller based Repeat Accuracy + / - 0.1%
Dip switch adjustment Provides first time setting accuracy of +/-2%
Setting accuracy +/-2% Provides flexibility for use in most applications
LED indication Provides visual indication of time delay status
Isolated 10A, DPDT
output contacts Allows control of loads for AC or DC voltages
Accessories
BZ1 Front Panel Mount Kit
Provides an easy method of through-the-panel
mounting of 8- or 11-pin plug-in timers, flashers,
and other controls.
NDS-8 Octal 8-pin Socket
8-pin 35mm DIN rail or surface mount. Surface
mounted with two #6 screws or snaps onto a
35 mm DIN rail. Uses PSC8 hold-down clips.
PSC8 or PSC11 Hold-down Clips
Securely mounts plug-in controls in any position.
Provides protection against vibration. Use PSC8
with NDS-8 Octal Socket or PSC11 with NDS-11
Socket. Sold in sets of two.
P1011-6 Octal Socket for UL listing*
8-pin surface mount socket with binder head
screw terminals. Rated 10A @ 600VAC.
C103PM (AL) DIN Rail
35 mm aluminum DIN rail available in a 36 in.
(91.4 cm) length.
Wiring Diagram
Relay contacts are isolated.
*
*8-pin models UL listed when used in
combination with P1011-6 socket only.
Ordering Information
MODEL INPUT VOLTAGE DELAY RANGE
TDM120AL 120VAC 1 - 1023s in 1s increments
TDM12DL 12VDC 1 - 1023s in 1s increments
TDM230AL 230VAC 1 - 1023s in 1s increments
TDM24AL 24VAC 1 - 1023s in 1s increments
TDM24DL 24VDC/28VDC 1 - 1023s in 1s increments
TDMH120AL 120VAC 10 - 10230s in 10s increments
TDMH24AL 24VAC 10 - 10230s in 10s increments
TDML110DL 110VDC 0.1 - 102.3s in 0.1s increments
TDML120AL 120VAC 0.1 - 102.3s in 0.1s increments
TDML12DL 12VDC 0.1 - 102.3s in 0.1s increments
TDML24DL 24VDC/28VDC 0.1 - 102.3s in 0.1s increments
If you don’t find the part you need, call us for a custom product 800-843-8848
8-PIN
© 2016 Littelfuse Protection Relays & Controls
Time Delay Relays
Dedicated - Delay-on-Make
www.littelfuse.com/tdm-tdmh-tdml
Rev: 1-A-062116
Specifications
Time Delay
Type Digital integrated circuitry
Range* 0.1 - 102.3s in 0.1s increments
1 - 1023s in 1s increments
10 - 10,230s in 10s increments
Repeat Accuracy ±0.1% or 20ms, whichever is greater
Setting Accuracy ±2% or 50ms, whichever is greater
Reset Time ≤ 50ms
Recycle Time During Timing - TDMH: ≤ 500ms
TDM, TDML: ≤ 300ms
Time Delay vs. Temperature
& Voltage ±2%
Indicator LED glows during timing; relay is
de-energized
Input
Voltage 12, 24, or 110 VDC; 24, 120, or 230VAC
Tolerance
12VDC & 24VDC/AC -15% - 20%
110VAC/DC to 230VAC -20% - 10%
AC Line Frequency 50/60 Hz
Power Consumption ≤ 2.25W
Output
Type Electromechanical relay
Form DPDT
Rating 10A resistive @ 120/240VAC & 28VDC;
1/3 hp @ 120/240VAC
Life Mechanical - 1 x107; Electrical - 1 x 106
Protection
Polarity DC units are reverse polarity protected
Isolation Voltage ≥ 1500V RMS input to output
Mechanical
Mounting Plug-in socket
Dimensions H 81.3 mm (3.2”); W 60.7 mm (2.39”);
D 45.2 mm (1.78“)
Termination Octal 8-pin plug-in
Environmental
Operating/Storage
Temperature -20° to 65°C / -30° to 85°C
Weight ≅ 6 oz (170 g)
*For CE approved applications, power must be removed from the unit when a switch position
is changed.
TDM / TDMH / TDML SERIES
Binary Switch Operation
Function Diagram
DELAY- ON-MAKE (ON-DELAY) V = Voltage
NO = Normally
Open Contact
NC = Normally
Closed Contact
TD = Time Delay
R = Reset
= Undefined
Time
