Technical Specifications:​ 24 VDC backplane or rack supply; combined configuration with 8 digital inputs and 8 digital outputs; input type dry contact or 24 VDC level; output type 24 VDC sourcing transistor or relay-dependent revision; channel-to-bus isolation; per-channel status LEDs; operating temperature 0–60 °C for cabinet revisions, −20–60 °C for extended industrial revisions; IP20 rack housing.

Functional Features:​ Optically isolated inputs with hardware filtering and software debounce; isolated solid-state or relay outputs for solenoids, indicators and interposing relays; short-circuit and open-circuit diagnostics on supported revisions; hot-swap replacement in compatible DNA carriers; centralized fault reporting to the controller.

Application Scenarios:​ Pulp and paper machine auxiliaries, chemical batch sequencing, power plant motor and valve interlock panels, water treatment pump control, and general process skids requiring compact on/off I/O.

Performance Parameters:​ Input response configurable with filter constants for contact debounce; output switching suitable for standard 24 VDC industrial loads within per-channel and aggregate current limits of the specific backplane; insulation and isolation values per the installed revision’s hardware manual.

Material Composition:​ Industrial-grade PCB with separated digital and power planes, optically isolated input stages, molded connector housings, metal or flame-retardant rack panel, and screw or spring terminal blocks.

Structural Characteristics:​ Compact plug-in body with labeled field terminals, rear backplane connector or DIN adapter, integrated LED array, and segregated input/output wiring zones for EMC compliance.

Working Principle:​ Field contacts or 24 VDC wetting voltage drive the input optocouplers; the input filter and logic convert contact state into backplane data. Output commands from the DNA controller pass through isolated drivers to sourcing transistors or relays, energizing field devices according to ladder or function-block logic.

Installation Requirements:​ Mount in the designated DNA rack slot or on 35 mm DIN rail using the approved carrier; supply isolated 24 VDC logic and separate field power where required; use shielded cable for long runs; keep input and output bundles separated from VFD or high-voltage cables; torque terminals to specification.

Usage Notes:​ Verify channel count and output type from the nameplate before wiring; install freewheel diodes or suppression for inductive loads; do not exceed per-channel current rating; perform hot-swap only in racks that support live replacement; back up I/O configuration before module change.