6101-0016

Instruction Leaflet 

## Farnell 

6101-0016                                                           Farnell Ref: 427-6577 

## **Operating instructions** 

Electrical connections by _250 (1/4”)_ push-on connectors. 

1 – Common 2 – N.C. opens on pressure rise 3 – N.O. closes on pressure rise 

The switch is factory set to operate within +/- 1 PSI at 10 PSI on rising pressure. 

## **Pressure connection** 

1/8” NPT base entry. 

## **Pressure range** 

Four springs are supplied with the switch, colour coded and offering the following ranges: 

*INSTALLED SPRING 10-40 PSI RED 30-125 PSI DARK BLUE 60-170 PSI SPRING KIT YELLOW 125-250 PSI      49-0002-A-00 

*fitted as standard 

Adjustment of the setpoint is provided by an adjustment screw and compression spring, acting against the force of the diaphragm.  Media pressure acting against the diaphragm causes the pressure disc to push up against the operator button of the microswitch.  The disc has a stop to prevent overtravel of the operator button of the microswitch. 

Because of the snap action, of the microswitch, the switches do have a “deadband” or “hysterisis” which most designers utilise in their logic circuit. Before attempting to change the pressure spring, disconnect the electrical supply from the microswitch and pressure hose from the pressure port. 

To change the pressure range spring, unscrew the pressure adjustment screw and withdraw only the operating spring from the body.  If the operating pin is also removed, replace it before replacing the spring. Select the new spring and insert into the switch and replace the adjustment screw. 

**Technical specification** Pressure range: 10-250 PSI (using four springs) Electrical:                                                                               SPDT(N/O or N/C) Contact Rating                                                                            5 Amp, 250Vac Fluid Medium                                                                     Wide range of media Burst pressure 500 psig Mechanical Life 1.0x10[6 ] cycles Operating temp -40 to 85[o] C Contacts Silver alloy Diaphragm Polyurethane Case material Die Cast Housing Weight                                                                                                  57 grams