• Provides a DPDT Relay Contact Closure at a Preset Frequency Input
• Standard Fail-Safe Operation
• Red and Green LED Alarm Status Indicators
• Adjustable Deadband
• Frequency Limit 60 kHz
• 50 mV to 100 V Peak Input Sensitivity
• Adjustable Threshold for Low Level Noise Rejection
• Unlimited Choice of Input / Output Ranges ( Within specified range limits )
• Input Pullup Resistor Available
• Choice of Power Options
• 10 Year Warranty

The MM1700 monitors a frequency input signal and trips a DPDT, 5 A relay when the input reaches the desired frequency. Alarms may be High acting (alarm trips on an increasing input frequency) or Low acting (alarm trips on an decreasing input frequency). Normal operation has the relay energized for the non-alarm condition and de-energized for an alarm condition. This provides a fail-safe alarm condition for loss of power to the module. The alarm has a set of red/green LEDs to indicate alarm status.

A deadband adjustment allows a deadband of 0.5 %to 100% of span to be set into the module. The deadband is symmetrical about the setpoint.

The wide range of input sensitivity allows the MM1700 to be driven from low level magnetic pickups as well as logic level signals. A threshold adjustment sets the minimum input amplitude the module will process. This allows the user to trade off sensitivity versus noise rejection. An optional pullup resistor (Option P) permits use with contact-closure or open-collector inputs.

All Wilkerson products are designed with RFI filters and lightning to reduce susceptibility to electrical noise and damage by lightning.

TYPICAL APPLICATIONS Flow rate, motor speed, conveyor speed, power line frequency on portable generators

INPUT RANGE select any range from 0 to 10 Hz min to 0 to 60 kHz max INPUT SENSITIVITY any voltage from 50 mV to 100 V peak INPUT IMPEDANCE 100 kilohms OPTION P Pullup resistor to + input 10 kilohms to +12 VDC SETPOINT 0 to 100% of span DEADBAND 0.5% to 100% of span ACCURACY ±0.1% of span RELAY CONTACTS (DPDT) Resistive Load 5 A max, 150 W max, 220 VAC max, 30 VDC max Inductive Load (Power Factor > 0.4) 2.5 A max, 75 W max, 220 VAC max, 30 VDC max

TRANSISTOR OUTPUT (Option V) Relay driver (12 V coil, 220 ohms) or open-collector outputs sink 100 mA, 30 V supply max COMMON MODE REJECTION 120 dB, DC to 60 Hz OPERATING TEMPERATURE 14°F to 140°F/–10°C to 60°C TEMPERATURE STABILITY ±0.02% of span/°C max POWER 115 VAC ±10%, 50/60 Hz (2.5 W max) 230 VAC ±10%, 50/60 Hz (2.5 W max) (DC Power Option) 24 VDC (limits 21-32 VDC) 12 VDC (limits 10-16 VDC) Isolation, DC power supply to input common: 10 megohms

PIN 1 PIN 2 PIN 3 PIN 4 PIN 5 PIN 6 PIN 7 PIN 8 PIN 9 PIN 10 PIN 11

Power AC L1 or DC + No Connection Power AC L2 or DC - Input Signal Input Common Relay Set 1 NO Relay Set 1 C Relay Set 1 NC Relay Set 2 NO Relay Set 2 C Relay Set 2 NC