Limit Switch ME-8108 | Mini Body with Roller Arm | TZ-8108

The ME-8108 is a small limit switch for industrial use, designed to consistently sense position. Its rotary roller lever actuator works well where a machine part moves past the switch. This momentary limit switch sends an electrical signal when its arm is pushed. Features and Benefits - Rotary roller lever arm - It works for side activation where a plunger wouldn't fit, and the roller reduces rubbing. - Adjustable arm length and angle - This lets you install the switch and fine-tune its trigger point without moving the main unit. - IP65 sealed construction - It's waterproof and oil-resistant, so it keeps working in tough workshop conditions. - Dual circuit (1NO/1NC) design - You can wire it to either close or open a circuit when it's triggered. Applications - Industrial machines: It's a position control switch for presses, lathes, and other automated equipment. - Robotics: Set boundaries for robotic arms and other automated systems' movements. - Material handling: Confirm the position of lifts, hoists, or other transport devices. Step 1: Address the Root Cause First A limit switch, such as the Limit Switch ME-8108, acts as a safety device to prevent machinery from exceeding its operational limits. If your equipment, like a furnace, is repeatedly triggering a limit switch, it is crucial to investigate the underlying cause before attempting a reset. Common culprits include blockages in air filters, issues with blower motors, or problems with the thermostat. Simply resetting the switch without addressing the root problem can lead to recurring shutdowns or more serious damage. Ensure the power to the equipment is off before inspecting any components. Step 2: How to Reset the Switch Resetting a limit switch can often resolve temporary issues, but always address the root cause first. The Limit Switch ME-8108 is a momentary switch, meaning it returns to its normal state once the activating force is removed. For many applications, this involves a soft reset. If the issue persists after a reset, further investigation by a qualified technician may be required to diagnose and repair the fault. Always ensure the power supply to the equipment is disconnected before attempting any manual intervention. Method A: Automatic / Soft Reset (Most Common) For many systems, including furnaces, a "soft reset" of the limit switch is the most common procedure. This typically involves cycling the power to the equipment. First, turn off the power supply to the appliance at the main breaker or fuse box. Leave the power off for at least 30 seconds to allow the system to fully discharge and the limit switch to cool down, especially if it was triggered by overheating. After the waiting period, restore power to the appliance. The momentary operation of the Limit Switch ME-8108 means it should automatically reset once normal operating conditions are restored. Method B: Manual Reset Switch The Limit Switch ME-8108 is a momentary switch and does not feature a dedicated manual reset button. Its design, with a Rotary Adjustable Roller Lever Arm, means it will automatically return to its normal state once the activating force is no longer present. Therefore, there is no specific manual reset procedure for this particular switch beyond addressing the condition that caused it to trip and allowing it to return to its default position. If a system requires a manual reset after a limit switch trip, this functionality would typically be integrated into the main control panel of the equipment itself, not on the limit switch. When to Call a Professional You should call a professional if your limit switch, such as the Limit Switch ME-8108, repeatedly trips despite your attempts to reset it and address potential causes. This indicates a more complex underlying issue that requires expert diagnosis. For instance, if your furnace limit switch keeps tripping even after checking filters and ensuring proper airflow, it could point to a faulty blower motor, heat exchanger problems, or issues with the controller. A qualified technician can safely identify the specific fault and perform necessary repairs to prevent further damage or safety hazards.