AI-TEK T77310-11 Speed Monitor

Core Performance & Industrial Application

The AI-TEK T77310-11 is a microprocessor-based digital speed monitor (speed switch) for rotating equipment overspeed and underspeed protection.

It measures input frequency from magnetic pickup or TTL pulse sources and converts speed into relay alarm outputs for shutdown and warning.

Adaptive period averaging delivers fast 50 ms updates above 100 Hz with ±0.05% relay setpoint accuracy over temperature.

Two SPDT sealed relay outputs support energize/de-energize logic with auto-reset hysteresis or latching remote reset.

It accepts passive or active sensor inputs and supports field programming without calibration equipment.

It is widely used for generator, turbine, pump and conveyor overspeed shutdown spare replacement.

Technical Specifications

▶ Product type: Digital speed monitor / speed switch

▶ Brand: AI-TEK (AI-Tek Instruments)

▶ Model: T77310-11

▶ Signal input: Passive magnetic / active TTL pulse

▶ Frequency range: Up to 30 kHz

▶ Output: 2 × SPDT relays, 6 A @ 28 VDC / 240 VAC

▶ Supply: 120 VAC ±10% 50/60 Hz or 24 VDC; max 15 W

▶ Response: 50 ms updates above 100 Hz

▶ Relay logic: Energize/de-energize above/below setpoint; auto-reset or latching

▶ Operating temperature: -10℃ ~ +55℃; storage -40℃ ~ +80℃

▶ Mounting: Panel / DIN housing

▶ Feature: Field programmable, EAROM memory retention, adaptive averaging

▶ Note: Input type, relay logic and supply configuration confirmed on nameplate

Industry Applications

Applied in generator sets, turbines, pumps, conveyors and fan overspeed / broken-belt protection spare replacement.

Note: Confirm input sensor type, relay logic, supply voltage and enclosure rating against the nameplate before ordering