Sensor and Controller Catalog

Output Comparison Guide

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Output Life

Controller Output

• DC input solid state relay (SSR) • PLC-dc input • Low voltage panel lamp

Switched dc, open collector

• Resistive 120 or 240VAC heater at less than 15A

NO-ARC 15A power control

• AC input SSR • AC input solid state contactor • High impedance load, typ. ≥5kΩ • Piezoelectric buzzer • Indicator lamps • Solenoid coil/valve • Mercury displacement relay (MDR) • Electromechanical relay • General purpose contactor

Solid state relay, Form A

Solid state relay, Form A with external contact suppression

• Various devices in on-off mode with contact suppression Electromechanical relay, Form A

• Various high impedance or inductive devices in on-off mode with coils suppressed • Indicator lamps • Small heaters • AC input solid state contactor • A safety limit circuit with contactor, electromechanical relay or MDR

Electromechanical relay, Form A or C

N/A

Electromechanical relay, Form A with external contact suppression

• Various devices in on-off mode • Solenoid coil/valve • MDR • Electromechanical relay • General purpose contactor • Pilot duty relays

Electromechanical relay, Form C with external contact suppression

• Phase-angle or burst fire SCRs • 0-20mA(dc), 4-20mA dc , 0-5VDC, 1-5VDC or 0-10VDC valve positioner • Inner loop’s set point for cascading controllers • Other instruments with process inputs

Universal process

Retransmit/Alarms

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Controller Output

Output Life

• Multiple devices, impedance dependent • Chart recorder • Master-remote (slave) system • Data logging device

Universal process

• Various devices in on-off mode

Electromechanical relay, Form A or C

Best Life Better Life

Good Life

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