SINGLE LOOP AND TWO LOOP PID CONTROLLERS ( 1/8 DIN SIZE)
Product Details:
| Place of Origin | Maharashtra, India |
|---|---|
| Brand Name | LIBRATHERM |
| Model Number | PID-948.PID-489 |
Detailed Product Description
MODEL WISE DESCRIPTION:
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PRODUCT DESCRIPTION:
Libratherm offers two new models of PID controllers Model PID-948 and PID-489. These are indigenously designed and developed using the latest microcontroller chip and programmed with the time tested and field proven PID algorithm. PID controllers are mainly used for the precise process control. Unlike On/Off type of oscillatory control, PID control action gives smooth and steady state control. These model offers, all the useful features which are required to control the complex system.
These models accept factoryset single or dual fixed input or the user selectable universal input. Thecontrol action is user selectable as PID or On/Off for both direct and reverse orHeat and Cool action . Control outputs are given in the form of optically isolated DC pulse to drive external SSR, Triac or AC SSR to operate AC operated load, electro mechanical relay and/or linear analog output. The analog output level scan also be configured for (0-20)mA or (4-20)mA or (0-5) / (0-10) volt using the front panel key board, In brief, PID-948 and PID-489 provide 4 switching outputs and 2 analog outputs. Both Auto and manual tuning of PID values makes the controller versatile and user friendly.The model PID-948 and PID-489 being small in size, can easily be accommodated in small size equipments. One Ramp/Soak function allows user to gradually increase the set value and hold the process value for desired soak time.
Libratherm also offers customized algorithm for special purpose applications, where user or OEM wants to have control and logic action to suit their application.
TECHNICAL SPECIFICATIONS:
The following specifications will suit almost all PID control applications however, for special PID algorithm for controlling modulating motorized valve refer to the model PID-961.
| Input | RTD(Pt-100) or Thermocouple (type J,K,R,S,B,C,D), V and mA (Maximum 8 user selectable inputs using keyboard and DIP switch on the back panel). Other inputs can also be provided as per the range selection table. |
| Range | Full +ve range of the selected input (please refer to the range selection table) |
| Resolution | 1oC for thermocouples and 0.1oC for Pt-100 for V and mA inputs subject to the required range. For V and mA input the position of the decimal point can be selected. |
| Sampling rate / Display rate | 40mS / 1 second |
| Indicating Accuracy | +/- 1oC for Thermocouple throughout the range and +/- 0.1oC for Pt-100 for (4-20)mA or (0-10)V - absolute to the input signal |
| One Ramp / Soak | Ramp rate : rt = 0.0 to 10.0oC/min or 0 to 10oC/min Soak time : St = 0 to 999 minute |
| Display (PID-948) | 4 digit 0.2" Red 7-segment display for process variable. 4 digit 0.2" Green 7-segment display for set value and PID parameters |
| Display (PID-489) | 4 digit 0.2" Red 7-segment display for process variable . 4 digit 0.2" Green 7-segment display for set value and PID parameters |
| Output Indication | Front Panel LED indications for Control Output, Alarms, Control and A/M status |
| Control Algorithm | PID or ON/OFF selectable (when specified for switching output). Direct action or Reverse action or both (to be specified in the ordering information) Direct Action is considered as Heat output where control output decreases as the error (SV-PV) is less positive and vice versa. Reverse Action is considered as Cool output where control output increases as the error (PV-SV) is more positive and vice versa. |
| Tuning | Auto/Manual tuning of PID values. |
| Settings | Using front panel feather touch dome key board to set various parameters. |
| Memory Backup | Retention of PID and Set values in the built in non-volatile memory - in case of power failure and automatic re-execution of control on power resumption. |
| Control Outputs (Switching) | Switching Outputs - DC pulse (0 to 10VDC@25mA), Relay or Triac (AC SSR) (rated for 5A @230VAC) (Dual output for 7.4.1 and 7.4.2). |
| Control Outputs (Analog) | Analog Outputs (4-20)mA (RL max = 300 Ohms) or 0-5VDC or 0-10VDC (RL min = 10KOhms) (Dual Output for 7.4.1 and 7.4.2) RL max = 300 Ohms |
| Retransmission Output (Analog) | 4-20mA non-isolated linearized and proportional to the selected input type and range. (Dual outputs can be provided when not used for control output). RL max = 300 Ohms. |
| Alarm Outputs | *2 extra Relay Outputs with programmable hysteresis- can be used as High or Low Alarms (relay changeover contacts rated for 5A @ 230VAC). *2 extra dc pulse outputs can be used for Alarms/logics as desired by the user. |
| Serial Communication | Optically isolated 2 wire RS485 in Modbus RTU protocol. (Slave mode with programmable modbus address) |
| Supply | (90VAC-250VAC),50/60 Hz. |
| Size / Enclosure | 96 x 48 x 110 mm.(PID-948) 48 x 96 x 110 mm.(PID-489) /ABS plastic with polycarbonate front graphic. |
| Panel Cutout / Terminals | 92 x 44 mm. +/- 0.5 mm. (PID-948) 22 back panel terminals 44 x 92 mm +/- 0.5 mm. (PID-489) - 22 back panel terminals |
SINGLE LOOP AND TWO LOOP PID CONTROLLERS ( 1/8 DIN SIZE)
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Company Info
LIBRATHERM INSTRUMENTS PVT LTD
[India]
[Verified Member]
City: Mumbai
Province/State: Maharashtra
Country/Region : India
Business Type:Manufacturer
Online Postings: Products
