Littelfuse TDM / TDMH / TDML Series - Delay On Make Timer
These timers were formerly SSAC and ABB timers
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Littelfuse Automation Products
The Littelfuse TDM Series is a delay-on-make timer (TDR) 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 Littelfuse TDM 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:
Wide delay range (0.1 s to 2.8 h): 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 10 A, DPDT output contacts: Allows control of loads for AC or DC voltages
Littelfuse TDM TDR Timer with Octal Plug
Specifications:
Time Delay
Type Digital integrated circuitry
Range: 0.1–102.3 s in 0.1 s increments 1–1023 s in 1 s increments 10–10,230 s in 10 s increments
Repeat Accuracy: ±0.1 %
Setting Accuracy: ±2 %
Reset Time: ≤ 150 ms
Time Delay vs. Temperature & Voltage: ±5 %
Indicator: LED glows during timing; relay is de-energized
Input
Voltage: 12, 24, or 110 V dc; 24, 120, or 230 V ac
Tolerance: 12 V dc & 24 Vdc/ac-15 %–20 %110 V ac/dc to 230 V ac-20 %–10 %
Ac Line Frequency: 50/60 Hz
Power Consumption: ≤ 3.25W
Output
Type: Electromechanical relay
Form: DPDT
Rating: 10 A resistive @ 120/240 V ac; 1/3 hp @ 120/240 V ac
Life
Mechanical - 1 x107; Electrical - 1 x 106
Protection
Polarity: Dc units are reverse polarity protected
Isolation Voltage: ≥ 1500 V RMS input to output
Mechanical:
Mounting: Plug-in socket
Dimensions: H 44.45 mm (1.75”); W 60.33 mm (2.38”); D (with socket) 104.78 mm (4.13”)
Termination: Octal 8-pin plug-in
Environmental:
Operating/Storage Temperature-20 °C to 65 °C / -30 °C to 85 °C
Weight: ≅ 4 oz (113 g)
Safety Marks:
UL (socket required)* UL 508 (E57310)*UL Listed when used with Part Number OT08-PC or RB08-PC manufactured by Custom Connector Corp
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| Dip Switch Config. for setting for the Littelfuse TDM Timer |
TDM120AL 120 Vac 1–1023 s in 1 s increments
TDM12DL 12 VDC 1–1023 s in 1 s increments
TDM230AL 230 Vac 1–1023 s in 1 s increments
TDM24AL 24 Vac 1–1023 s in 1 s increments
TDM24DL 24/28 VDC 1–1023 s in 1 s increments
TDMH120AL 120 Vac 10–10230 s in 10 s increments
TDMH24AL 24 Vac 10–10230 s in 10 s increments
TDML110DL 12 VDC .1–102.3 s in 0.1 s increments
TDML120AL 120 Vac .1–102.3 s in 0.1 s increments
TDML12DL 12 VDC .1–102.3 s in 0.1 s increments
TDML24DL 24/28 VDC .1–102.3 s in 0.1 s increments
Accessories:
OT08PC: 8-pin Octal Socket for UL listing* Octal Socket for plug-in units. 8-pin surface & DIN-rail mountable. Rated for 10 A @ 600 V ac
P1011-6: Octal Socket for UL listing* 8-pin surface mount socket with binder head screw terminals. Rated 10 A @ 600 V ac.
C103PM (AL) DIN Rail: 35 mm aluminum DIN rail available in a 36 in. (91.4 cm) length.
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