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OT100FT3

The ABB OT100FT3 is a Fail-Safe, Digital Input (DI) Module designed for ABB's Freelance/AC 800F distributed control system (DCS) platform. It forms part of the remote I/O stations that interface field devices with the central controller.

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Typical Parameters Parameter Description / Typical Value Module Type Fail-Safe Digital Input Module System Compatibility ABB Freelance DCS, AC 800F Controller, S800 I/O or F-I/O Series. Number of Channels 16 channels (common for this form factor). Input Type Dry Contact (volt-free contact) or Wet Contact (sourcing DC voltage). Nominal Input Voltage 24 VDC (most common). Also available in versions for 48 VDC and 125 VDC. Input Signal Level "0" (OFF): Typically < 5V DC. "1" (ON): Typically 15-30V DC (for 24V nominal). Input Current Typically ~5-10 mA per channel (at nominal voltage). Isolation Channel-to-Channel: Yes (typically 500V AC). Channel-to-Bus: Yes (optical isolation). Diagnostics Yes. Includes wire-break/short-circuit detection, module failure, and communication loss. Update Time Very fast, typically 1-10 ms per module (configurable). Backplane Bus S800 I/O Bus or Profibus-DP/PA, depending on the specific system configuration and the interface module used (e.g., CI871). Power Supply Requires 24 VDC for internal electronics, typically sourced from the system power supply or the field side. LED Indicators Per-channel status LEDs (Green/Red) and module status LEDs (RUN, ERR, etc.). Certifications Complies with CE, UL, cUL, and relevant industrial standards (IEC 61131).