Plug-In, Delay On Break Timers, TNM Timers, Airotronics


Plug-In Delay On Break Timers - TNM Timers

Plug-In Delay On Break Timers

The TNM Delay on Break units meet the needs of customers who require IC digital timing circuits with octal, magnal round and QC bases for plug-in installation. The units are available in SPDT, DPST and DPDT relay forms up to 10 amp with fixed or adjustable time periods.


Timing Mode

Input voltage is applied continuously. Upon closure of the normally open isolated external initiate switch, the load is energized, and remains energized as long as it is closed. When the external initiate switch opens, the time delay is started. At the end of the time delay, the load is de-energized, and the timer is ready for another cycle.

  • CMOS IC digital timing
  • Multi-board construction
  • Relays are sealed
  • Proven circuitry
  • Standard terminal configurations
  • Fixed or variable time adjustment
  • Optional remote time adjustment
  • Up to 24 hrs (std), 72 hrs (opt)
  • 0.1% Repeat accuracy
  • 100% Operational testing before shipping
Input Voltages:
  • VAC: 12, 24, 120,230,50/60/ Hz
  • VDC: 12 or 24

Relay Contact Ratings: 5 amp DPDT, 10 amp DPDT Optional

Repeat Accuracy: ±0.1% under fixed operating conditions

Reset Time: 50 milliseconds

Tolerances: Fixed: ±10%, Optional: ±5%, ±1% Variable: +20%, -0 Optional:+10%, -0%
Note: Tolerances on variable units are with respect to
upper limit only. Timers with time periods greater than 10 sec. will have a 100 to 1 ratio, i.e., 1 to 100 seconds, 30 to
3000 seconds. Timers with time periods less than 10 sec. will have a 10 to 1 ratio, i.e., .99 to 9.9 seconds, .5 to 5 seconds.

Life Expectancy:
  • Mechanical: 1 million operations
  • Electrical: Up to 100,000 operations at full current load
  • Polarity Protection: All DC units have reverse polarity protection
  • Transient Protection: 25 joules
Temperature Ranges:
  • Storage: -40°C + 85°C
  • Operating: -25°C to +85°C
Housing Material: High Impact, UL approved black Lexan

Operating Voltage: ±20% of nameplate voltage

Mode of Operation Series Input Voltage Time Ranges Tolerance Time Adjust. Method Base Style Options
Delay On Break TNM 1 120 VAC
2 230 VAC
3 24 VAC
4 24 VDC

7 12 VDC
8 Special AC
9 Secial DC
(Fixed: ±10%
Variable: +20% 10%)

E Optional
(Fixed: ±5%)

F Optional
(Fixed: ±1%)

G Optional
(Adjust.: +10%, -0%)

A Variable knob on timer

C Factory fixed time

1 8 pin round octal base

2 11 pin round magnal base

3 11 pin spade .187 quick connect

X Standard 5 amps

H 10 amps (8 amps UL Recognized for USA and Canada)

0001 .1 to 1 sec.
0001 .1 to 1 sec.
0010 .1 to 10 sec.
0100 1 to 100 sec.
1000 10 to 1000 sec.
Any range up to 72 hours available on special order
Specify time in full seconds or hours followed by the letter "S" or "H" and the decimal amount of the main time unit and the decimal amount of the main time unit.
Examples: 5S5 is 5.5 secs.
5H5 is 5.5 hours

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