i-therm AI-5981 Digital Temperature Controller User Manual

i-therm AI-5981 Digital Temperature Controller

SPECIFICATIONS

DISPLAY TYPE

• Dual 4- Digit 7 segment LED
• 4 Digit Bright White (PV)
• 4 Digit Luminous Green (SV)

• STATUS LEDS: OP 1: Main Control Output

INPUT

• Sensor Input: TC: J/K/R/S & RTD: Pt-100
• Range: Refer below table

± 0.3 o C

• Sampling Time: 125 msec.
• Resolution: 1°C/0.1°C(Only for RTD)
• CJC for TC: Built-in automatic
• LWC for Pt-100: Built-in up to 18E max.
• Digital Filter : 1 to 10 Sec.

RELAY OUTPUT

• Contact type : N/O, CM, N/C
• Contact Rating : 5A @ 250VAC or 30 VDC
• Life expectancy : > 5,00,000 operations
• Isolation: Inherent

SSR DRIVE OUTPUT

• Drive Capacity: 12V @ 30mA.
• Isolation: Non-Isolated.

FUNCTION

• Output 1: Main Control output
• Control Action: ON-OFF/T.P (user selectable)
• Control Mode: Heat/Cool (user selectable)
• Compliance: —-

ENVIRONMENTAL

• Operating Range : 0 ~50°C, 5~90% Rh
• Storage Humidity: 95% Rh (Non-condensing)

POWER SUPPLY

• Supply Voltage: 90-270VAC, 50/60Hz.
• Consumption: 4W Maximum.

PHYSICAL

• Housing: ABS Plastic.

SAFETY INSTRUCTION

This controller is meant for temperature control applications. It is important to read the manual prior to installing or commissioning of the controller. All safety-related instructions appearing in this manual must be followed to ensure safety of the operating personnel as well as the instrument.

GENERAL

• The controller must be configured correctly for the intended operation. Incorrect configuration could result in damage to the equipment or the process under control or it may lead to personnel injury.
• The controller is generally part of the control panel and in such a case the terminals should not remain accessible to the user after installation.

MECHANICAL

• The Controller in its installed state must not come in close proximity to any corrosive/combustible gases, caustic vapors, oils, steam or any other process by-products.
• The Controller in its installed state should not be exposed to carbon dust, salt air, direct sunlight or radiant heat.
• Ambient temperature and relative humidity surrounding the controller must not exceed the maximum specified limit for proper operation of the controller.
• The controller in its installed state must be protected against excessive electrostatic or electromagnetic interferences. Ventilation holes provided on the chassis of the instrument are meant for thermal dissipation and hence should not be obstructed in the panel.

ELECTRICAL

• The controller must be wired as per the wiring diagram & it must comply with local electrical regulations.
• Care must be taken not to connect AC supplies to low-voltage sensor input.
• Circuit breakers or mains s/w with fuse (275V/1A) must be installed between the power supply and supply terminals to protect the controller from any possible damage due to high voltage surges of extended duration.
• Circuit breakers and appropriate fuses must be used for driving high-voltage loads to protect the controller from any possible damage due to short circuits on loads. % To minimize pickup of electrical noise, the wiring for low voltage DC and sensor input must be routed away from high current power cables. Where it is impractical to do this, use shielded ground at both ends.
• The controller should not be wired to a 3-Phase supply with unearthed star connection. Under fault conditions, such supply could rise above 264 VAC which will damage the controller.
• The Electrical noise generated by switching inductive loads might create momentary Fluctuation in the display, alarm latch-up, data loss or permanent damage to the instrument.
• To reduce this use a snubber circuit across the load.
• It is essential to install a over Temp. Protection device to avoid any failure of the heating system. Apart from spoiling the Product, this could damage the process being controlled.

CAUTION: To prevent the risk of electrical shock, switch off the power before making/removing any connection or removing the controller from its enclosure.

MECHANICAL INSTALLATION

The label on the controller identifies the serial number, wiring connections and batch number.

OVERALL DIMENSIONS & PANEL CUT OUT (IN MM)

• MODEL:-AI-5981

TABLE : 1

Dim

Model

| A| B| C| D| E| F| G| H
---|---|---|---|---|---|---|---|---
AI-5981| 96| 96| 10| 45| 89| 92| 92| 9

INSTALLATION GUIDELINES

1. Prepare the cut-out with proper dimension as shown in the figure.
2. Remove clamp from the controller
3. Push the controller through the panel cut-out and secure the controller in its place by tightening the side clamp.

ELECTRICAL INSTALLATION
The electrical connection diagram is shown on the controller enclosure as below.

FRONT PANEL LAYOUT

FRONT PANEL LAYOUT DESCRIPTION

PROGRAMMING

USER LIST: To access the user list press the SET key once.

CONTROL LIST: To enter in this mode press the SET & DOWN key simultaneously for 3 sec. Users can set the control parameters as shown below.

CONFIGURATION LIST

1. To enter in this mode, Press and hold the SET & UP keys simultaneously for 3 sec.
2. Press the UP or DOWN key to scroll between parameter options.
3. Press the SET key to store the current parameter & move on to the next parameter.

USER GUIDE

ON-OFF ACTION

In this mode, output (Relay/SSR) remains ON till the actual temperature reaches to the set point. On reaching SP, the output turns OFF & remains OFF till the actual temperature drops down (in heat logic) or raises (in cool logic) equal to the hysteresis set by the user. (As shown in Fig: 3.1 & 3.2)

TIME PROPORTIONAL ACTION

In this mode, the ON & OFF time of Output (Relay/SSR) varies proportionally in every cycle (cycle time settable by User) depending on the deviation of PV w.r.t. SP. This action starts/continues only when PV enters or is within the band. (As shown in Fig: 3.3)

MANUAL RESET

(OFFSET ADJUSTMENT) : In some applications, after adopting-Time proportionating action, the system may stabilize at a particular temperature over a period of time which can be different than the set value. This steady state (error) offset can be eliminated by setting this value, equal and opposite to the existing offset. (As shown in Fig : 3.4)

ABBREVIATION

• C.A.: Control Action
• CJC : Cold junction compensation
• CM: Common terminal of the relay
• LWC: Lead wire (Length) compensation
• NC: Normally Close terminal of the relay
• NO: Normally Open terminal of the relay
• OP1: Output 1
• PV: Process Value (actual temp.)
• SP: Set Point Value(set temp.)
• SSR: Solid State Relay
• T.P.: Time Proportional
• T/C : Thermocouple

Mfgd by: Innovative Instruments & Controls LLP

• 338, New Sonal Link Service Industrial Premises Co-op Society Ltd,
• Building No.2, Link Road, Malad (W), Mumbai – 400064.
• Tel: 022-66939916/17/18;
• E-mail: [email protected].
• Website : www.itherm.co.in.

References

• Home - Itherm

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