TheCMA128 (3DDE300408)is a high-availability, compact Digital Input/Output Control Module engineered by ABB to deliver deterministic I/O performance across demanding industrial environments. This space-saving hybrid module combines digital signal acquisition and precise actuator driving into a single hardware assembly, featuring8 digital inputs and 8 transistor-based, sourcing digital outputs.
Technical Specifications
Manufacturer: ABB
Model Number Designation:CMA128
Global Part Number / Product ID:3DDE300408
Device Classification: Combined Digital Input / Output (I/O) Module
System & Rated Input Voltage: 24 VDC nominal
Digital Input Channels: 8 channels (Optically isolated)
Digital Output Channels: 8 channels
Output Switching Architecture: Solid-state Transistor, Sourcing type (PNP)
Maximum Current Load per Output: 0.5 A continuous per channel
Signal Electrical Isolation: Galvanic optical barrier between logic backplane and field wiring
Maintenance Profile: Supports hot-swapping / live system replacement (chassis-dependent)
Diagnostics Array: Channel-specific status LEDs and systemic internal bus error tracking
Industrial Application Scenarios
TheCMA128 (3DDE300408)combination module is tailored for localized equipment automation, skid control systems, packaging lines, and conveyor sorting arrays within Programmable Logic Controller (PLC) or Distributed Control System (DCS) nodes. Because it contains an even split of 8 inputs and 8 outputs, a single card can manage an entire sub-assembly on the factory floor. For instance, on a pneumatic sorting station, the 8 digital inputs track physical proximity switches and stroke-limit sensors, while the 8 sourcing transistor outputs immediately fire the 24V directional solenoid valves that extend or retract the sorting arms. This layout minimizes required panel rail space and simplifies localized terminal wiring.
