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ABB
ABB AX521 S500 Analog Input/Output Module – 1SAP250100R0001, 4 AI + 4 AO, Voltage/Current/Pt100, 12-Bit + Sign
<p><strong>ABB AX521 S500 Analog Input/Output Module – 1SAP250100R0001</strong> featuring <strong>4 configurable analog inputs and 4 configurable analog outputs</strong>. Supports voltage, current and Pt100 RTD inputs with voltage/current outputs and 12-bit + sign resolution. Designed for compatible ABB AC500/S500 industrial automation systems, process control, sensor measurement, VFD control and PLC expansion applications.</p>
Stock: 0SKU: SEN-ABB-AX521Model: AX521
BDT 44,000BDT 44,500
Final pricing may vary by configuration, quantity, delivery and project requirements.
Product overview
ABB AX521 S500 Analog Input/Output Module – 1SAP250100R0001
The ABB AX521, product number 1SAP250100R0001, is an S500 series analog input/output module designed for ABB AC500 PLC and distributed I/O automation systems.
The module combines 4 configurable analog inputs and 4 configurable analog outputs in one compact unit. The analog inputs support voltage, current and Pt100 RTD measurement, while the analog outputs support voltage and current signals.
4 Configurable Analog Inputs
The AX521 provides 4 analog input channels that can be individually configured for different industrial measurement signals.
- 0 to 10 V
- -10 to +10 V
- 0 to 20 mA
- 4 to 20 mA
- Pt100 RTD temperature measurement
4 Configurable Analog Outputs
The module also provides 4 analog output channels for controlling compatible industrial equipment such as variable frequency drives, actuators, control valves and other analog-controlled devices.
- -10 to +10 V voltage output
- 0 to 20 mA current output
- 4 to 20 mA current output
12-Bit + Sign Resolution
The AX521 provides 12-bit resolution plus sign, enabling accurate analog signal acquisition and control for industrial automation applications.
Galvanic Isolation
The module provides module-wise galvanic isolation, helping electrically separate the analog I/O electronics from other sections of the automation system.
ABB AC500 / S500 Integration
The AX521 can be used as a centralized I/O expansion module for compatible ABB AC500 CPUs or as a decentralized S500 I/O module with compatible ABB communication interface modules.
Key Specifications
| Manufacturer | ABB |
| Model | AX521 |
| Product Number | 1SAP250100R0001 |
| Product Series | ABB S500 / AC500 |
| Product Type | Analog Input / Output Module |
| Analog Inputs | 4 |
| Analog Input Types | Voltage / Current / Pt100 RTD |
| Analog Outputs | 4 |
| Analog Output Types | Voltage / Current |
| Voltage Input | 0–10 V / -10 to +10 V |
| Current Input | 0–20 mA / 4–20 mA |
| Voltage Output | -10 to +10 V |
| Current Output | 0–20 mA / 4–20 mA |
| Resolution | 12 Bit + Sign |
| Isolation | Module-Wise Galvanic Isolation |
| Mounting | ABB S500 Terminal Unit / DIN Rail System |
| Application | Industrial Automation / PLC Analog I/O |
Typical Applications
- ABB AC500 PLC Systems
- Industrial Process Control
- Temperature Measurement with Pt100
- 4–20 mA Sensor and Transmitter Inputs
- 0–10 V Analog Signal Processing
- Variable Frequency Drive Control
- Control Valve and Actuator Control
- Pressure and Flow Measurement
- Factory Automation
- Machine Automation
- Process Automation
- Industrial Equipment Repair and Maintenance
Important Installation Information
The AX521 is an ABB S500 I/O module and requires a compatible S500 terminal unit and suitable AC500/S500 system configuration. The terminal unit, CPU, communication interface and other accessories should not be considered included unless specifically stated.
Before replacing an existing module, verify the complete product number 1SAP250100R0001, terminal unit, PLC configuration, wiring method and analog signal ranges.