Watlow PM PLUS PID & Limit Controller | Temperature Controllers

The MLS300 series controllers provide 16 or 32 fully

independent loops of PID control. When used as a stand-alone

controller, you may operate the MLS300 via the two-line 16-

character display and touch keypad. You can also use it as the

key element in a computer-supervised data acquisition and

control system; the MLS300 can be locally or remotely

controlled via an EIA/RS-232 or EIA/RS-485 serial

communications interface.

The MLS300 features include:

• Direct Connection of Mixed Thermocouple Sensors:

Connect most thermocouples to the controller with no

hardware modifications. Thermocouple inputs feature

reference junction compensation, linearization, process

variable offset calibration to correct for sensor

inaccuracies, detection of broken, shorted or reversed

thermocouples, and a choice of Fahrenheit or Celsius

display.

• CIM300 Input Option: The CIM300 input module

provides high density sensor termination with a smaller

installation footprint and faster installation.

• Accepts Resistive Temperature Detectors (RTDs): Use

3-wire, 100 ohm, platinum, DIN-curve sensors with two

choices for range and precision of measurements. (To use

this input, order a MLS316 or MLS332 controller with

scaling resistors.)

• Automatic Scaling for Linear Analog Inputs: The

MLS300 series automatically scales linear inputs used

with other industrial process sensors. Enter two points,

and all input values are automatically scaled in your units.

Scaling resistors must be installed.

• Dual Outputs: The MLS300 series includes both heat

and cool outputs for up to 16 loops. Independent control

parameters are provided for each output.

• Independently Selectable Control and Output Modes:

You can set each control output to ON/OFF, Time

Proportioning, Serial DAC, or Distributed Zero Crossing

mode. Set up to two outputs per loop for ON/OFF, P, PI,

or PID control with reverse or direct action.

• Control Outputs: Set high/low deviation and high/low

process limits to operate digital outputs as on/off control

functions or alarms.

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