HONEYWELL CV-DINA-DI1624-2A – 16‑channel 24 VDC Digital Input Module for DIN‑Rail I/O Expansion

The HONEYWELL CV-DINA-DI1624-2A is a compact DIN‑rail digital input module designed to gather on/off signals from field devices such as sensors, limit switches, pushbuttons, flow or pressure switches. It typically serves as an expansion I/O block within Honeywell DIN‑rail control architectures—especially where reliable 24 VDC discrete monitoring is required.

From my experience, it fits well in panel retrofits and OEM machines where space is tight and documentation needs to stay clean. You might notice that the channel density (16 DI) hits a sweet spot for packaging lines, HVAC plants, and utilities skids without overcomplicating wiring.

• 16 digital inputs, 24 VDC – Collects status from dry contacts or 24 V sourcing devices (typical). Good coverage for a single machine cell or small process area.

• DIN‑rail mounting (TS35) – Quick to install, easy to service; ideal for compact control cabinets.

• Integrated input filtering – Debounces mechanical contacts and helps reject noise, which in many cases reduces nuisance trips.

• Channel grouping and common terminals – Simplifies field wiring and labeling; typically reduces terminal count and panel time.

• Status LEDs per channel – Fast troubleshooting at the door; maintenance teams usually love the immediate visual feedback.

• Backplane/local bus connection via DINA carrier – Designed to sit on a DIN adapter (DINA) so the host controller or remote I/O head handles communications upstream.

• Industrial temperature range – Suitable for control rooms and most factory-floor enclosures when properly ventilated.

• Field‑proven Honeywell build – Solid terminals, consistent labeling, and a stable bill of materials across revisions like “‑2A”.

The CV-DINA-DI1624-2A fits right into:

• - Packaging and material handling (sensors, photoeyes, jam detection, e‑stops monitoring)




•    - HVAC and building services (airflow switches, damper end‑switches, pump contact feedback)




•    - Water/wastewater skids (level switches, valve end‑limits, local permissives)




•    - Process utilities (compressed air, steam traps, filter differential switches)




•    - OEM machinery where compact, serviceable DI blocks are a priority

A maintenance manager told me their team shaved troubleshooting time by half simply because each channel’s LED showed exactly which door switch wasn’t made after a changeover. It sounds small, but on a busy line that typically matters more than specs on paper.

• Reliability – Stable DI thresholds and filtering reduce false trips in noisy cabinets.

• Compatibility – Designed to work within Honeywell DIN‑rail ecosystems; upstream communications are handled by the chosen controller/head, which keeps designs flexible.

• Panel efficiency – 16 inputs in a tight footprint; in many cases it lowers cabinet width and wiring labor.

• Lifecycle support – Honeywell documentation and long‑term availability are strong points for regulated industries.

• Cost control – The channel density and fast replacement approach can cut downtime and spares inventory.

• Cabinet & mounting – Install on TS35 DIN rail inside an IP‑rated enclosure. Maintain clearance for airflow; avoid heat sources directly beneath the module.

• Power & grounding – Use a regulated 24 VDC supply with proper grounding. Follow a clean 0V reference and segregate power wiring from signal wiring to minimize noise.

• Wiring – Use ferrules on stranded conductors. Group commons as labeled by the terminal map. For long runs or noisy environments, shielded cable and proper drain wiring typically help.

• Safety – De‑energize circuits before servicing. Verify input polarity for PNP sensors and contact wetting current for dry contacts.

• Commissioning – Validate each input with the front LEDs and the host controller diagnostics. Apply input filtering where mechanical bounce is observed.

• Routine maintenance – Periodically re‑torque terminals, check for wire discoloration or loosened ferrules, and keep the module dust‑free. Firmware/config tools are usually on the host; keep them current according to site policy.

• CE and RoHS compliant (typical for Honeywell industrial I/O)

• UL/cUL recognition is commonly available for DIN‑rail I/O modules in this class

• Manufacturing quality aligned to ISO‑certified processes

• Standard manufacturer warranty; extended coverage available through channel programs

If you’re matching this module to an existing Honeywell DIN‑rail controller or remote I/O head, share the head/CPU model and we can confirm bus compatibility, power budget per carrier, and terminal maps. That cross‑check usually saves time during FAT and prevents small wiring surprises at site.