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---------------------------------------- Product presentation ----------------------------------------

Exi Controller CTR 210i

intrinsically safe pid controller CTR 210i in field housing

With the intrinsically safe process automatic controller even complex control functions can be solved. It can be installed directly in hazardous area zone 1 in local operating stations.
The following informations are indicated:

process variable
setpoint
control deviation
output
manual / automatic mode
TAG

The sensor and actuator binding takes place directly in the hazardous location. Following inputs and outputs are present:

three analogue inputs, 4 - 20 mA (passive) or Pt100 (3-wire)
two analogue outputs 4 - 20 mA for manipulated variable or other variables e. g. process variabel

intrinsically safe pid controller CTR 210i in panel mount housing

six digital inputs for switch functions
six digital outputs for alarms
Modbus interface

Special functions for batch reactors:

splitrange output for control of heating and cooling valves
cascade control for product and jacket temperature
two parallel controller
16 step setpoint programmer function
no overshot of the product temperature
dynamic limitation of the temperature difference between product and jacket
dynamic activation of the integral algorithm
switching function via digital inputs: different parameter sets, security outputs, setpoint ramps, releases, input and setpoint selection

Power supply and interface separation:

For powering the intrinsically safe controller controller CTR 210i the supply module PSC 300i with intrinsically safe exits is needed. The Modbus interface is a intrinsically safe current loop interface wich is connected to the IPC 300i. This module separates the intrinsically safe signal in the hazardous area from the RS-485 signal in the safe area.

Functions:

Local setpoint controller:

The setpoint can be changed via the buttons at the controller front.

Slave controller:

The required setpoint is transmitted to the controller via a 4 - 20 mA signal.

Ratio controller:

The ratio of two product flows is controlled. The actual ratio from the two inputs is shown as process variable..

Difference controller:

The difference between two temperatures is controlled. The actual difference is shown as process variable.

Application: Within a reactor at the cooling process the jacket temperature must be 3K less than the product temperature.

Setpoint setter function:

The controller function from the CTR 210 i is deactivated. The CTR 210 i works only as a setpoint setter and indicator. Via the keys the setpoint is adjusted. This is shown in the upper display. The setpoint can be transmitted via the analogue output and a seperator to the save area.
The middle display shows the setpoint.
The activated manual / automatic mode can be transmitted to the supervisor system via a digital output. The CTR 210 i can be prgrammed, so that only in automatic mode a setpoint adjustment is possible.

Manual / automatic station:

A valve output signal from the save area is indicated in the second display. In the case that the controller is in automatic mode, the output signal will be transmitted "one to one" to the valve via an analogue output. In the case that the controller is in manual mode, the output signal to the valve can be adjusted directly at the CTR210i.

Two channel controller (option)

It is possible to have two separate controller in one CTR 210i. Switch the display by pressing the S-key. The TAG number shows the actual shown controller. It is possible to habe two separate outputs or a minimum or maximum selection of both.

Cascade controller (option)

cascade controller

Two separate controller are connected in cascade by the software in one CTR 210 i. The output of the master controller is the setpoint of the slave controller. The indication at the display can be switched between the master and the slaves by pressing the S-key. The TAG number signalised the indicated controller. The displayed output is every time the output from the slave controller.

Heating-up process without temperatur overshot:

heating-up process

At the temperature control of a batch reactor it’s important to reach the product temperature very quickly, without temperature overshoots.
The master of the cascade controls the product temperature. He works as a proportional controller. His operating point has the same value like his set point.
When the product temperature is rising, the value of the control difference is decreasing and the product- and the jacket temperature meet each other at the required set point.

Dynamic limitatin of the temperature difference:

dynamic limitation of the temperature difference

In the case of cascade control, it's possible to have a dynamic limitation between the product- and the jacket temperature. This prevents chemical reactions of the product at the hot jacket and it prevents the damage of the enamel inside of the reactor.

Special function "16 step set point ramp" (option)

It‘s possible to program a set point -curve with 16 set point steps and 16 time intervals. It’s also possible to switch the digital outputs during each program step.The start, stop and the reset of the program can be activated in a special user level without going into the program levels. It is possible to program three set point curves with 16 set point steps and 16 time intervals. It's also possible to switch the six digital outputs during each program step. The start, stop and reset of the program can be activated in a special user level without going into the program levels.