Industrial OTBVR81L-34040 Optical Touch Button

The OTBVR81L-34040 is Banner Engineering’s OPTO-TOUCH Optical Touch Button from the OTB Series, a momentary-action, touch-activated photoelectric switch designed to replace capacitive touch sensors and mechanical pushbuttons in industrial control panels. Housed in red polycarbonate (the “L” designation indicates the polycarbonate version), it delivers a compact, robust touch interface for machine control and equipment panels. The device provides a SPDT (Form C) relay output, giving both normally open and normally closed contacts for straightforward interfacing with PLCs and other logic inputs. It operates on a 10–30 VDC supply, making it compatible with common industrial power rails while minimizing wiring complexity. The optical sensing surface enables reliable actuation without physical contact, reducing wear and extending life in high-use environments. Typical applications include control-panel actuation for conveyors, automated doors or gates, machine controls, and other equipment where hands-free or touch-based input is advantageous, all while delivering instant, momentary signaling to the controller without mechanical wear parts. This model, identified by 34040 in Banner’s catalog, embodies the durable, low-maintenance qualities of the OTB Series and is suited for rugged industrial settings requiring repeatable, contactless actuation.