Proximity Switch Testing

Dc 2 3 or 4 wire type sensors.

Proximity switch testing.

Allows for fast field checks troubleshooting and or demonstration of 10 30 v dc sensors with a maximum sensor current draw of 100 ma. The proximity switch usually has 3 specific wires going to the switch. Insulation resistance this test measures the dc resistance across the open contacts measured in ohms with an ohm meter and the switch in a de energized state. Grounding hsi sensing can check a proximity sensor that contains a wire connected to the metal housing.

When this field is interrupted by a conductive object moving into the field the switch will detect this and cause a contact closure or opening based on the type of proximity switch. The proximity switch generates a small radio frequency field. For technical drawings and 3 d models click on a part number. A proximity switch will be in its normal status when it is distant from any detectable object.

Testers for proximity and photoelectric switches verify the signal output type of dc switches a red light indicates npn and a green light indicates pnp. A proximity switch is one detecting the proximity closeness of some object. If not you could have uncontrolled motion from other sources due to conditions in the ladder logic. Make sure to put the machine in e stop when testing the switches or solenoids manually to check there diagnostics.

Testing switches proximity solenoids contactors or relays. Confirms operation of inductive photoelectric capacitive and ultrasonic sensors. Pocket sized sensor tester with push type terminals makes wire connections quick and easy.