WILKERSON INSTRUMENT CO., INC.

MM1800 Potentiometer Position Input Plug-In
Single Alarm Mighty Module

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MM1800

MM1800
Potentiometer Position Input
Plug-In
Single Alarm
Mighty Module

$300.00

The following information must be entered to complete your order:
See "Specifications" below for Input range limits.

Power:

Alarm: Alarm Action
  Alarm Logic

Quantity:

 

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Specifications
 
  • Features
  • Description
  • Specifications
  • Dimensions
  • Connections
  • Provides a DPDT Relay Contact Closure at a Preset Potentiometer Position Input
  • Potentiometer Values from 100 ohms to 100 kilohms
  • Standard Fail-Safe Operation
  • Adjustable Deadband
  • Red and Green LED Alarm Status Indicators
  • Latching Alarm Available (MM1810)
  • Unlimited* Choice of Input Ranges
  • Choice of Power Options
  • 10 Year Warranty

The MM1800 monitors the slide position of a potentiometer and trips a dpdt, 5 A relay when the input exceeds the desired level. Normal operation has the relay energized for the non-alarm condition and deenergized 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.

With the latching alarm option, the latching alarm has no deadband control. Once the limit has been reached the alarm latches and power to the module must be momentarily interrupted to reset the alarm.

All Wilkerson products are designed with RFI filters and lightning protection to reduce susceptibility to electrical noise and damage by lightning. They also utilize a stable 1 V power supply to excite the potentiometer. Any value potentiometer from 100 ohms to 100 kilohms can be used.

TYPICAL APPLICATIONS
Tank level, valve or actuator control, monitoring or warning.

INPUT POTENTIOMETER RESISTANCE
any value from 100 ohms to 100 kilohms

SPAN ADJUSTMENT
70% to 100% of pot rotation

OFFSET ADJUSTMENT
0 to 25% of pot rotation

INPUT IMPEDANCE
>10 megohms

SETPOINT
0 to 100% of span

DEADBAND
0.5% to 100% of span

RELAY CONTACTS (dpdt)
Resistive Load 5 A max, 150 W max,
220 VAC, 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

EXCITATION
1 V, 10 mA max load

RESPONSE TIME
20 ms typical

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

Mighty Module Dimension Drawing

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 +
Potentiometer Input FS
Power AC L2 or DC -
Potentiometer Input Zero
Potentiometer Input Wiper
Relay Set 1 NO
Relay Set 1 C
Relay Set 1 NC
Relay Set 2 NO
Relay Set 2 C
Relay Set 2 NC
Specifications    Manual

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