SIMATIC S7-1500 Analog Input Module AI8 RTD 6ES7 531-7KF00-0AB0
The Siemens SIMATIC S7-1500 Analog Input Module AI8 RTD 6ES7 531-7KF00-0AB0 is a module designed for the SIMATIC S7-1500 series of programmable logic controllers (PLCs). That can be configured for various types of signals, including resistance temperature detectors (RTDs).
Technical key Features:
- Module Type: Analog Input (AI) module for S7-1500
- Number of Inputs: 8 channels.
- Input Types:
- Voltage: Configurable for various ranges (±10 V, ±5 V, 0-10 V, 1-5 V).
- Current: Configurable for various ranges (±20 mA, 0-20 mA, 4-20 mA).
- Resistance Temperature Detectors (RTD): Adjustable for channels Pt100, Pt1000, Ni100, Ni1000) in 2, 3, or 4-wire connection.
- Thermocouple (TC): Can be set per channel for various thermocouple types
- Resolution: 16 bits including sign.
- Channel Grouping: 8 channels in one group.
- Measurement RTD: Up to 4 channels can be used for RTD measurements.
- Front Connector: The front connector (screw terminals or push-in) needs to be ordered separately.

Summery:
You can likely find this module through Siemens’ authorized distributors and partners in your region. You may want to contact companies specializing in industrial automation and control systems in Dhaka or other industrial areas.