Electronic PID Controllers | Control Loop Accessories | Control Valves

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TR890 Series

TR890-Series Electronic PID Controller

A controller is a comparative device that receives an input signal from a measured process variable, compares this value with that of a predetermined control point value (set point), and determines the appropriate amount of output signal required by the final contro element to provide corrective action within a control loop. (T-length) is the measurement between the instrument connection and process connection of the thermowell.

Principle of Operation (Electronic PID Controller)

An electronic sensor (thermocouple, RTD or transmitter) installed at the measurement location continuously sends an input signal to the controller. At set intervals, the controller compares this signal to a predefined set point. If the input signal deviates from the set point, the controller sends a corrective electric output signal to the control element. This electric signal must be converted to a pneumatic signal when used with an air operated valve, such as a Watson McDaniel HB Series Control Valve. The conversion can be made using a Watson McDaniel TA901 I/P Transducer, which converts a 4 to 20 mA electric signal to a 3 to 15 PSI air signal. As an option, a Valve Positioner such as the Watson McDaniel CA2000 may be used to send an air signal to the Control Valve. These Positioners can be controlled with a 3-15 psi air signal from a Pneumatic Controller or a 4-20 mA signal from a PID Controller.

Features (Electronic PID Controller)

Watson McDaniel Electronic Controllers have full auto-tuning and PID capabilities, and offer a host of available options, including user selectable inputs, outputs and ranges.

PID Control is a feature of Watson McDaniel TR890 Electronic Controllers. PID combines the proportional, integral and derivative functions into a single unit.

Proportional (P) — Proportional control reacts to the size of the deviation from set point when sending a corrective signal. The size of the corrective signal can be adjusted in relation to the size of the error by changing the width of the proportional band. A narrow proportional band will cause a large corrective action in relation to a given amount of error, while a wider proportional band will a cause smaller corrective action in relation to the same amount of error.
Integral (I) — Integral control reacts to the length of time that the deviation from set point exists when sending a corrective signal. The longer the error exists, the greater the corrective signal.
Derivative (D) — Derivative control reacts to the speed in which the deviation is changing. The corrective signal will be proportional to the rate of change within the process.

Auto-Tuning will automatically select the optimum values for P, I and D, thus eliminating the need for the user to calculate and program these values at system startup. This feature can be overridden when so desired. On some models, the control element can be manually operated.

How To Order a TR890-Series

1) Model (Case Size)

The Case Size selection is determined by both available and controller features.

2) Input

The Control Input is the signal received by the controller from the sensor. One of three input types can be specified for the controller:

[8] Universal: For sensing temperature using a thermocouple, RTD or other device with mV output
[4] mA: For controlling pressure or other process conditions with a 4-20 mA output
[6] VDC: For controlling pressure or other process conditions with a 0-10 VDC output

A thermocouple for sensing temperature will require a Universal type input (8). Please check your sensor output to select correct type of input of the controller.

3) Control Output

The control output is the corrective signal transmitted from the controller to the control device. Four control out types can be specified for the controller:

[I]: 4-20mA control signal
[Y]: On/Off contact for controlling relays
[P]: SSR drive voltage for controlling Solid State Relays
[V]: 0-10 VDC control signal

A thermocouple for sensing temperature will require a Universal type input (8). Please check your sensor output to select correct type of input of the controller.

4) Power Supply

The power supply requirement for the electronic controller must be specified. The available choices are: 100-240 VAC, 50/60 Hz or 24 V AC/DC, 50/60Hz.

5) Event Output (Option)

The Event Output is used to signal an external device when an alarm condition is detected. Various alarm types can be detected by the controller. These include deviation of the measured value from the set value, the measured value exceeding absolute limits (i.e., high and low level alarm) and heater break/loop alarm (i.e., heater current outside of normal limits). If selected as an option, the controller will have two Event Outputs. In the case of a high/low alarm, one output is used for the high level alarm and the other for the low level alarm.

6) Options: Analog Output & Digital Input

The Analog Output is an optional secondary signal that transmits either the measured process value (PV), the target set value (SV) or the Control Output value from the controller to a remote data acquisition device, such as a recorder, personal computer or display unit. One of the following three analog output types can be specified for the controller: 0-10 mV DC, 4-20 mA DC or 0-10 V DC. The analog output type is independent of the measured input type or the control output type. However, the analog output type selection must be compatible with the data acquisition device input.

The Digital Input is an optional input that can be specified for the controller. The digital input functions as an On/Off switch and can be programmed to activate the Set Value Bias or Standby mode, or switch the Control Action type (i.e., to Reverse Acting or Direct Acting).

Note: The Analog Output and Digital Input combination is not available for Model TR891. Only one of these options can be selected for this model.

TR890 Series Controller

TR890 Series Electronic PID Controller is designed for use on applications where large load changes are expected, or extreme accuracy and fast response times are needed.

Model	Descriptions	Input	Control Output	Power Supply	Event Output	Options
TR891-8-A-90-0-00	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	None	None
TR891-8-A-90-0-30	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	None	Analog Output (0-10 mVDC)
TR891-8-A-90-0-40	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	None	Analog Output (4-20 mA)
TR891-8-A-90-0-60	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	None	Analog Output (0-10 VDC)
TR891-8-A-90-0-08	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	None	Digital Input (switch)
TR891-8-A-90-1-00	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	Dual Event (high and/or low alarm)	None
TR891-8-A-90-1-30	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (0-10 mVDC)
TR891-8-A-90-1-40	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (4-20 mA)
TR891-8-A-90-1-60	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (0-10 VDC)
TR891-8-A-90-1-08	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	100 - 240 VAC	Dual Event (high and/or low alarm)	Digital Input (switch)
TR891-8-A-08-0-00	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	None	None
TR891-8-A-08-0-30	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	None	Analog Output (0-10 mVDC)
TR891-8-A-08-0-40	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	None	Analog Output (4-20 mA)
TR891-8-A-08-0-60	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	None	Analog Output (0-10 VDC)
TR891-8-A-08-0-08	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	None	Digital Input (switch)
TR891-8-A-08-1-00	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	Dual Event (high and/or low alarm)	None
TR891-8-A-08-1-30	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (0-10 mVDC)
TR891-8-A-08-1-40	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (4-20 mA)
TR891-8-A-08-1-60	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (0-10 VDC)
TR891-8-A-08-1-08	48mm x 48mm (1/16 DIN)	Universal	4 - 20 mA	24 VAC/VDC	Dual Event (high and/or low alarm)	Digital Input (switch)
TR891-8-C-90-0-00	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	None	None
TR891-8-C-90-0-30	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	None	Analog Output (0-10 mVDC)
TR891-8-C-90-0-40	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	None	Analog Output (4-20 mA)
TR891-8-C-90-0-60	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	None	Analog Output (0-10 VDC)
TR891-8-C-90-0-08	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	None	Digital Input (switch)
TR891-8-C-90-1-00	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	Dual Event (high and/or low alarm)	None
TR891-8-C-90-1-30	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (0-10 mVDC)
TR891-8-C-90-1-40	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (4-20 mA)
TR891-8-C-90-1-60	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (0-10 VDC)
TR891-8-C-90-1-08	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	100 - 240 VAC	Dual Event (high and/or low alarm)	Digital Input (switch)
TR891-8-C-08-0-00	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	None	None
TR891-8-C-08-0-30	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	None	Analog Output (0-10 mVDC)
TR891-8-C-08-0-40	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	None	Analog Output (4-20 mA)
TR891-8-C-08-0-60	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	None	Analog Output (0-10 VDC)
TR891-8-C-08-0-08	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	None	Digital Input (switch)
TR891-8-C-08-1-00	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	Dual Event (high and/or low alarm)	None
TR891-8-C-08-1-30	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (0-10 mVDC)
TR891-8-C-08-1-40	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (4-20 mA)
TR891-8-C-08-1-60	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (0-10 VDC)
TR891-8-C-08-1-08	48mm x 48mm (1/16 DIN)	Universal	On/Off Contact	24 VAC/VDC	Dual Event (high and/or low alarm)	Digital Input (switch)
TR891-8-D-90-0-00	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	None	None
TR891-8-D-90-0-30	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	None	Analog Output (0-10 mVDC)
TR891-8-D-90-0-40	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	None	Analog Output (4-20 mA)
TR891-8-D-90-0-60	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	None	Analog Output (0-10 VDC)
TR891-8-D-90-0-08	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	None	Digital Input (switch)
TR891-8-D-90-1-00	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	Dual Event (high and/or low alarm)	None
TR891-8-D-90-1-30	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (0-10 mVDC)
TR891-8-D-90-1-40	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (4-20 mA)
TR891-8-D-90-1-60	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (0-10 VDC)
TR891-8-D-90-1-08	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	100 - 240 VAC	Dual Event (high and/or low alarm)	Digital Input (switch)
TR891-8-D-08-0-00	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	None	None
TR891-8-D-08-0-30	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	None	Analog Output (0-10 mVDC)
TR891-8-D-08-0-40	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	None	Analog Output (4-20 mA)
TR891-8-D-08-0-60	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	None	Analog Output (0-10 VDC)
TR891-8-D-08-0-08	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	None	Digital Input (switch)
TR891-8-D-08-1-00	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	Dual Event (high and/or low alarm)	None
TR891-8-D-08-1-30	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (0-10 mVDC)
TR891-8-D-08-1-40	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (4-20 mA)
TR891-8-D-08-1-60	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (0-10 VDC)
TR891-8-D-08-1-08	48mm x 48mm (1/16 DIN)	Universal	SSR Driver	24 VAC/VDC	Dual Event (high and/or low alarm)	Digital Input (switch)
TR891-8-E-90-0-00	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	None	None
TR891-8-E-90-0-30	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	None	Analog Output (0-10 mVDC)
TR891-8-E-90-0-40	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	None	Analog Output (4-20 mA)
TR891-8-E-90-0-60	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	None	Analog Output (0-10 VDC)
TR891-8-E-90-0-08	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	None	Digital Input (switch)
TR891-8-E-90-1-00	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	Dual Event (high and/or low alarm)	None
TR891-8-E-90-1-30	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (0-10 mVDC)
TR891-8-E-90-1-40	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (4-20 mA)
TR891-8-E-90-1-60	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	Dual Event (high and/or low alarm)	Analog Output (0-10 VDC)
TR891-8-E-90-1-08	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	100 - 240 VAC	Dual Event (high and/or low alarm)	Digital Input (switch)
TR891-8-E-08-0-00	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	None	None
TR891-8-E-08-0-30	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	None	Analog Output (0-10 mVDC)
TR891-8-E-08-0-40	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	None	Analog Output (4-20 mA)
TR891-8-E-08-0-60	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	None	Analog Output (0-10 VDC)
TR891-8-E-08-0-08	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	None	Digital Input (switch)
TR891-8-E-08-1-00	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	Dual Event (high and/or low alarm)	None
TR891-8-E-08-1-30	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (0-10 mVDC)
TR891-8-E-08-1-40	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (4-20 mA)
TR891-8-E-08-1-60	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	Dual Event (high and/or low alarm)	Analog Output (0-10 VDC)
TR891-8-E-08-1-08	48mm x 48mm (1/16 DIN)	Universal	0 - 10 VDC	24 VAC/VDC	Dual Event (high and/or low alarm)	Digital Input (switch)

Downloads

Catalog Spec Sheet (pdf)

I&M (pdf)

Product Overview

The TR890 Series Electronic PID Controller is designed for use on applications where large load changes are expected, or extreme accuracy and fast response times are needed. With full auto-tune capabilities and a large selection of available inputs, the TR890 Series is ideally suited for use with a Watson McDaniel Control Valve.

Use of a Watson McDaniel No. TA987 Air Filter/Regulator is recommended for filtering and regulating the pressure of plant compressed air, and for delivering clean, dry air at the proper pressure to pneumatic control devices.

Dimensions and Weights