AX521 1SAP 250 100 R0001 Analog I/O Module ABB

ABB AX521 Analog Input/Output Module – 1SAP 250 100 R0001

• Analog Inputs: The module features 4 bipolar analog inputs configurable for 0-10V, -10-10V, 0-20mA, 4-20mA, Pt100, Pt1000, or Ni1000 sensors. Each input can be set independently for your specific application needs.
• Analog Outputs: It provides 4 analog outputs configurable for -10-10V, 0-20mA, or 4-20mA signals. The current outputs support loads from 0 to 500Ω, while voltage outputs drive up to ±10 mA.
• Resolution and Accuracy: The system delivers 12-bit resolution for all ranges, with a typical conversion error of ±0.5% at 25°C. The maximum error remains within ±1% across the entire 0°C to 60°C operating temperature range.
• Signal Processing: The input filter time constant is 100 µs for voltage and current signals. The conversion cycle takes 2 ms for all 8 inputs and outputs combined, extending to 1 second for Pt/Ni temperature measurements.

Technical Specifications and Environmental Tolerance

• Process Voltage: The module operates on a 24V DC supply with a maximum ripple of 5%. It includes reverse polarity protection and a 10A fast-acting fuse on the UP terminal.
• Galvanic Isolation: The 1SAP 250 100 R0001 provides isolation between the channels and the I/O bus. It does not isolate channels from each other or from the process supply voltage.
• Temperature Range: The module operates reliably from 0°C to 60°C in horizontal mounting. Vertical mounting reduces the output load to 50% per group at 40°C and above.
• Environmental Tolerance: It withstands humidity up to 95% without condensation. The unit tolerates storage and transport temperatures from -40°C to 70°C.
• EMC and Protection: The module maintains accuracy within ±1% even under EMC disturbances. It features overvoltage protection on all input channels.

Frequently Asked Questions (FAQ)

• Q: Can I connect a Pt100 sensor directly to this module?
  Yes, the inputs support 2-wire and 3-wire Pt100, Pt1000, and Ni1000 connections with individual channel configuration.
• Q: What happens if I leave unused inputs open?
  Configure unused voltage inputs as "unused" to avoid interference. Unused current inputs have low resistance and can remain open-circuited safely.
• Q: Does the module provide isolation between channels?
  No, the AX521 does not isolate channels from each other. It does provide isolation between the channels and the I/O bus.
• Q: What is the inrush current at power-up?
  The inrush current from UP at power-up is 0.020 A²s. Consider this value when sizing your power supply.
• Q: Can I use the analog inputs as digital inputs?
  Yes, you can configure each analog input as a digital input with a configurable delay of 0.1 to 32 ms and a threshold of 13V for signal 1.