Honeywell 10106/2/1 Fail-Safe Digital Input Module

The Honeywell 10106/2/1, also cataloged as the 10106/2/1 fail-safe digital input module, monitors 16 line-monitored input loops or status signals from DIN 19234 (NAMUR) proximity switches. It includes earth fault monitoring for all 16 channels and supports safety applications up to SIL 3 according to IEC 61508. An onboard DC/DC converter supplies power to connected field devices through a common supply shared by all channels.

Hardware Specifications

Fail-Safe Input Monitoring and Signal Conversion

The 10106/2/1 monitors the electrical state of each input loop and detects earth faults across the 16 channels. Its input circuitry supports line-monitored loops and status signals from NAMUR proximity switches. Front-panel LEDs indicate channel status, loop status, and module diagnostic conditions.

NAMUR proximity switch signals require conversion before they can be processed by the 10106/2/1. The 10106/A series signal converter is installed on the programming connector (Px) at the rear of the I/O backplane in the 19-inch rack. The field device supply is generated by an onboard DC/DC converter shared by all 16 channels.

Frequently Asked Questions (FAQ)

Q: Can the 10106/2/1 connect directly to NAMUR proximity switches?

A: The supplied documentation specifies that NAMUR proximity switch signals require conversion through a 10106/A series signal converter installed at the Px programming connector on the rear of the I/O backplane.

Q: What diagnostic functions are available on the module?

A: The module provides channel status, loop diagnostics, module diagnostics, and earth fault monitoring for all 16 input loops. Front-panel LEDs indicate the relevant status and diagnostic conditions.

Q: What functional safety level does the 10106/2/1 support?

A: The module design meets DIN 19250 (AK5/6) requirements and can be used in applications up to SIL 3 according to IEC 61508. The safety capability of the complete application depends on the system architecture and applicable safety assessment.

Field Installation Guidelines

• Install the module in its designated I/O backplane position within the 19-inch rack.
• Verify backplane compatibility and the correct module slot before installation.
• Install the appropriate 10106/A series signal converter at the Px connector when interfacing with NAMUR proximity switches.
• Separate field signal wiring from power conductors and high-noise switching circuits where practical.
• Terminate cable shields according to the system grounding design and the manufacturer's installation instructions.
• Verify field wiring polarity, loop continuity, and earth fault conditions before commissioning.
• Confirm that channel assignments and diagnostic indicators correspond to the actual field wiring.
• For SIL 3 applications, validate the complete safety loop, including field devices, signal conversion, controller configuration, and proof-test requirements.