The Nolatron TB-1 machine start bar is a complete OSHA compliant ergonomic two hand starting system.  It increases productivity while operator fatigue and stress are decreased.  It features a 16 gauge steel NEMA 12 enclosure, guarded hand sensors and an anti-defeat (“anti-tie-down”) control with front panel indicator lights.   When properly installed, the TB-1 start bar meets OSHA requirements of section 1910.217(6) which covers two-hand controls.



Anti-tiedown – The TB-1 start bar requires an operator to have both hands on start switches in order to start machine operation. This minimizes the possibility of the operator starting the machine while his hand is in the work area.

Control Reliability – The TB-1 start bar is designed to meet the OSHA classification of “control reliability” as defined in Sec. 1910.217(b)(13).

Redundant Output Contacts – The TB-1 start bar uses double “positive guided” output relays. Each relay is checked for proper status prior to beginning a machine cycle.

Flexible Mounting – The TB-1 can be mounted horizontally above or below the point of operation.  It can also be mounted vertically beside the point of operation.



TB-1 Start bar with optical hand sensors
TB-1A TB1plain.jpg (15507 bytes)
Start bar with field effect sensors
TB-1AE TB1stop.jpg (17277 bytes)
Start bar with field effect sensors and emergency stop switch
TB-1AETS TB1full.jpg (17752 bytes)
Start bar with field effect sensors, emergency and top stop switches


Momentary Output – To begin a machine cycle, both hand sensors must be touched within a window of time.  The load will then energize as long as the hand sensors are held or the optional Reset switch is momentarily opened.  The Reset switch must be closed in order for the bar to be ready for the next machine cycle. This time is factory set at .5 seconds and is adjustable.

Maintained Output – An optional Hold switch can be wired into the start bar to provide a maintained output. When the Hold switch is closed, the load will stay energized even after the start switches are released. The Hold switch must not close until the machine passes the pinch-point, and it should remain closed for the rest of the machine cycle.If the optional Reset switch is opened at any point during the machine cycle, the outputs will de-energize and the control will reset. Both start switches must be released and the Reset switch must be closed before another machine cycle can be started.


Physical Dimensions

31.5″ x 3.25″ x 2.75″ (L x W x H)
6.25″ high measured to top of guard
Weight 9.25 lbs.
Power Requirements 115 VAC, 50/60 Hz, 1 watt standby, 8 watts output energized
Output Load Rating 8 Amps @ 120 VAC (Switching)
6 Amps @ 120 VAC (Continuous)
Output Life 10 million cycles minimum (mechanical)
500,000 cycles (electrical @ 120VAC / 8 amps)
Switches must be activated within: Factory set at .5 seconds
Terminal Strip Accepts 14 – 22 gauge stranded wire
Start Switches Model TB-1
Electronic infrared photo sensors, approx. 80ms. response time.Model TB-1A, TB-1AE, TB-1AETS
Electronic field-effect sensors, self testing.
Temperature Range 20 – 140 degrees F
Origin Made in U.S.A.

Nolatron TB-1 Application Notes

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