Wilkerson Instrument Co. Homepage A World of Signal Conditioning & Process Control Instrumentation Products


MM7010
FREQUENCY INPUT
TRANSMITTER

FEATURES
bulletProvides DC Output Proportional to Frequency Input
bulletFully Isolated Output Available
bulletFrequency Limit 60 kHz
bullet50 mV to 100 V Peak Input Sensitivity
bulletAdjustable Threshold for Low Level Noise Rejection
bulletInput Pullup Resistor Available
bulletUnlimited* Choice of Input/Output Ranges
bulletChoice of Power Options
bullet10 + 5 Year Warranty


DESCRIPTION

The MM7010 provides a DC output voltage or current proportional to the frequency of the input signal. It is useful for measuring flow, speed of motors, conveyors, or other devices that can create a periodic signal proportional to the desired function.  The wide range of input sensitivity allows the MM7010 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.

The module includes filtering and conditioning to reduce susceptibility to transients and noisy operations.

TYPICAL APPLICATIONS

Measuring or monitoring flow, speed of motors, conveyors, etc.

MOUNTING

The module is designed to plug into a  standard 8-pin relay socket.  Part number  MP008 is a molded plastic socket suitable for mounting on a flat surface or in a 2 3/4 inch wide PVC snap track (TRK48).  Use CLP-1 hold-down clip if needed. A Killark HK Series explosion-proof housing with dome and 8-pin socket is available (HKB-HK2D-8).

SPECIFICATIONS

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
 10 kilohms pullup resistor to +5V

Open-circuit voltage
  +12 VDC (nonisolated output)
  +5 VDC (isolated output)

OUTPUT RANGE
Voltage
  select any range from  -10 V to +15V
  10 mA max load
    (min span 0.2 V)

Current
  select any range from 0 to 50 mA max
    (min span 1 mA)
  24 V compliance**
    18 V compliance for ISO option
    if full scale output >20 mA

ACCURACY
±0.1% of span

LINEARITY
±0.1% of span

COMMON MODE REJECTION
120 dB, DC to 60 Hz

ISOLATION (Optional)
Output/Input
  >500 megohms

Breakdown Voltage
  >1000 VAC rms

OUTPUT RIPPLE
<0.1% of span
  (peak to peak)

BREAKDOWN, P0WER/CIRCUITRY
 >1500 VAC rms

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)
    (2.5 W max)
  Isolation
    DC power supply to input common:
      10 megohms

* Within specified range limits

** Compliance:  The sum of all voltage drops in the output loop cannot exceed 24V at rated current (1200 ohms 20 mA).


CONNECTIONS
Power AC L1 or DC +
Power AC L2 or DC -
Input +
Input -
Output +
Output - 		PINS
1
3
5
6
7
8