MULTISPAN PTC-1202A - User Manual

The Multispan PTC-1202A is a process and temperature controller designed for industrial applications, offering precise control and monitoring capabilities.

Function Description

The device functions as a PID (Proportional-Integral-Derivative) controller, capable of both PID control with auto-tuning and ON-OFF control for heating and cooling applications. It also supports blower time proportion (BL.TP) for cooling. The controller features two relay outputs for control actions and an analog output (4-20mA DC) for retransmission of process value (PV) or set value (SV), or for manual selection. It includes alarm functions such as High, Low, Inband, Outband, Absolute Low, and Absolute Outband alarms. A soak timer function is also available, allowing for programmed temperature profiles.

Important Technical Specifications

Input Types:
- Thermocouples: J (0 to 600°C), K (0 to 1200°C)
- RTD: PT-100 (-99 to 400°C), PT.1 (-99.9 to 400.0°C)
- Analog: 0-10V DC, 0-20mA DC, 4-20mA DC (all -999 to 9999 range)
Resolution: 1°C for J, K, PT-100; 0.1°C for PT.1; 0.1, 0.01, 0.001, 0001 for analog inputs.
Indication Accuracy: ±1% of FSD + 1 Count (FSD: full scale deflection).
Output Specifications:
- Relay Outputs: 2 nos., 1 C/O (NO-C-NC) type, rated 5A, 230V AC/30V DC.
- Analog Output: 4 to 20mA DC.
- Transmitter Supply: 24V DC.
Auxiliary Supply: 100 to 270V AC, 50-60Hz.
Power Consumption: Approximately 7 VA @ 230V AC MAX.
Environmental Conditions:
- Operating Temperature: 0°C to 55°C.
- Relative Humidity: Up to 95% RH (non-condensing).
- Protection Level: IP-65 (Front side) as per IS/IEC 60529:2001.
Dimensions: 96 (H) x 96 (W) x 54 (D) mm.
Panel Cutout: 92 (H) x 92 (W) mm.
Display: Upper 4-digit, 7-segment 0.8" RED LED for Process Value (PV); Lower 4-digit, 7-segment 0.56" White LED for Set Value (SV).

Usage Features

The controller is designed for ease of use with a clear display and intuitive key operations.

Display Indication: The upper display shows the Process Value (PV) and the lower display shows the Set Value (SV). An output percentage indication is also provided.
Key Operation:
- SET key: Used to enter parameter setting mode (press for 5 seconds), set parameter values, and save/exit parameter settings.
- V key: Used to increment parameter values.
- ^ key: Used to decrement parameter values.
- ENT key: Used to enter parameter setting mode, start/stop PID auto-tuning (press for 6 seconds), go to factory setting mode (press for 3 seconds), and reset soak process (long press).
Control Methods: Supports PID control with auto-tuning and ON-OFF control for both heating and cooling. Cooling can also utilize Blower Time Proportion (BL.TP).
Alarm Functions: Configurable for High, Low, Inband, Outband, Absolute Low, and Absolute Outband alarms.
Parameter Setting: A comprehensive menu structure allows users to configure various parameters including proportional band (PB), integral time (IT), derivative time (DT), cycle time (CT), manual reset (MR), offset, hysteresis, cooling proportional band (C-PB), cooling ON/OFF times, relay delay times, and alarm time.
Factory Setting: A dedicated factory setting menu allows for resetting the device to default values.
Analog Output Configuration: The analog output can be configured for retransmission of PV or SV, or for manual percentage-wise selection.
Soak Timer: Allows for programming a soak time with selectable units (hour, minute, second) and memory function.

Maintenance Features

The device is designed for minimal maintenance, with clear guidelines for installation and cleaning.

Cleaning: The equipment should be cleaned regularly to prevent blockage of ventilating parts. Use a clean soft cloth; avoid isopropyl alcohol or other cleaning agents.
Fuse: The fusible resistor should not be replaced by the operator.
Installation Guidelines:
- Proper panel cutout and secure mounting with clamps.
- Avoid proximity to heating sources, caustic vapors, oils, or other unwanted process byproducts.
- Use specified crimp terminals (M3.5 screws) for wiring, tightening screws with a torque of 1.2 N.m.
- Do not connect anything to unused terminals.
- Ensure the device is installed in an environment within the specified temperature and humidity ranges.
- A circuit breaker or mains switch must be installed between the power source and the supply terminal for power ON/OFF.
Safety Precautions:
- Always turn off power supply before wiring to prevent electric shock.
- Do not touch terminals while power is supplied.
- Use appropriate wire ratings and twists to reduce electromagnetic interference.
- Cables for power connection must have a cross-section of 1mm or greater with insulation capacity of at least 1.5kV.
- For thermocouple extension, use compensation wires. For RTD, use wiring material with small lead resistance (50Ω max per line) and no resistance differentials among the three wires.
- Using a standard power supply cable can improve anti-noise effect.