4B Touchswitch Operation Manual - Page 10

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The orange wire is not used and should be cut back and insulated.
SENSOR OPERATION:
The Touchswitch™ is an electronic limit switch that reacts when pressure is applied to the sensor face.
If the pressure exceeds 3.6 kg (8 lbs.), the sensor relay goes into an alarm condition (Illustration D).
Illustration C denotes normal running conditions, with no pressure applied.
BLUE
WHITE
GREEN LED ON:
Indicates power and relay
energized, no belt contact.
BLUE
WHITE
GREEN LED ON:
Indicates power and relay
energized, no belt contact.
The Touchswitch is factory pre-calibrated and no sensitivity adjustment is necessary. The sensor is
calibrated to switch to the alarm state when belt lateral force exceeds 3.6 kg (8 lbs). .
The Touchswitch contains a non-replaceable permanent 50 mA fuse and a thermal fuse set at 75° C
(167° F) .
4B recommends that the machine shuts down when the belt contacts the Touchswitch. If the machine
does not shut down and the belt is allowed to continue to rub against the face of the Touchswitch, the
hardened stainless steel sensor puck may wear and the heat generated by the friction may cause the
thermal fuse to blow. This fuse is non-replaceable and non-repairable.
NOTE
No
Belt
Contact
Illustration C
Normal Running Condition
Belt
Contact
Illustration D
Alarm Condition, Belt Misaligned to the Right
NOTE
PAGE 10
BLUE
WHITE
GREEN LED ON:
Indicates power and relay
energized, no belt contact.
BLUE
WHITE
GREEN LED OFF:
Indicates relay de-energized,
belt contact or no power.