Honeywell DC-SDRX01 DCS Module/Board/Rack

The Honeywell DC-SDRX01, also cataloged as the DC-SDRX01 Fiber Optic Converter Module, operates as a dedicated hardware component for converting and extending electrical communication signals within Honeywell Distributed Control System (DCS) networks.

Hardware Specifications

Process Control Integration and DCS Interface

• 4-20 mA HART Loop Protocol Propagation: The converter translates serial/backplane control protocols carrying 4-20 mA process variables and HART instrument diagnostics into optical pulses, enabling error-free routing across geographically separated process areas.
• Physical Galvanic Isolation: Optical conversion provides absolute physical isolation between remote network segments. This design blocks high-voltage common-mode surges, eliminates local ground loop hazards, and provides complete noise immunity against electromagnetic interference (EMI) and radio frequency interference (RFI).
• Cold Junction Compensation (CJC) Coexistence: By eliminating electrical signal skew and copper-line resistance degradation, the optical link preserves microsecond-level synchronization needed for real-time CJC data transmission from remote thermocouple termination enclosures to primary controllers.

Frequently Asked Questions

Q: Can the DC-SDRX01 be inserted or removed while the host Honeywell rack is powered?

A: No. The DC-SDRX01 does not support active hot-swapping. You must isolate and switch off the local 24 VDC power supply feed before installing or removing the module to prevent electrical damage to the optical transceivers.

Q: What type of optical fiber cables and connectors are compatible with this module?

A: The DC-SDRX01 is designed primarily for multi-mode fiber optic cabling (typically 62.5/125 micrometers) utilizing standard industry-grade bayonet ST or push-pull SC physical connectors, supporting distances up to 2 km without active repeaters.

Field Installation Guidelines

• Fiber Minimum Bend Radius: During installation, do not bend the fiber optic patch cables beyond their minimum bend radius limits (typically 30 mm). Sharp bends cause physical micro-fractures in the glass core, leading to severe signal attenuation.
• Dust Cap Preservation: Keep the plastic dust caps installed on the optical transmitter (Tx) and receiver (Rx) ports until the moment of physical cable termination. Even microscopic airborne dust particles block light paths and degrade data transmission.
• DIN-Rail Earthing: Ensure the integrated DIN-rail mounting clips establish a tight physical metal-to-metal contact with a grounded conductive rail. This provides a direct path to earth for internal transient voltage protection circuits.