KEBA DO272/A (often written as DO272A) digital output module
KEBA DO272/A (often written as DO272A) digital output module
(Kemro K2-200 series, 14 channels / 24V DC / 2A) I. Product Overview
KEBA DO272/A (DO272A) is a 14-channel digital output module of the Austrian KEBA Kemro K2-200 system. It is used to convert controller instructions into 24V DC switching signals, driving solenoid valves, relays, contactors, indicator lights and other actuators. It is widely used in injection molding machines, die-casting machines, machine tools and automated production lines.
II. Core Functions
14 Independent Outputs
Each output can be individually switched. 24V DC transistor output (source type / drain type compatible).
Single output 2A drive (50% simultaneous rate)
Suitable for solenoids, small hydraulic valves; permanent short-circuit protection, automatic shutdown upon fault and reporting. Electrical isolation
System side ↔ Output side photoelectric isolation, with a withstand voltage of 707V, strong anti-interference ability.
Quick shutdown for inductive loads.
Built-in release circuit, suitable for electromagnetic valves / relay coils, reducing contact erosion.
Channel status indication
Each channel's orange LED: constantly on = ON, off = OFF, flashing = short circuit / overload.
K-bus bus plug-and-play + hot-swappable
Backplane power supply, automatic identification, replaceable during operation, maintenance without shutdown.
Multiple protections
Overvoltage, reverse polarity, overcurrent, short circuit, overheating.
III. Technical parameters (official manual data)
Model: DO272/A (DO272A)
Series: Kemro K2-200
Number of channels: 14 digital outputs
Output voltage: 24V DC (19.2～30V DC)
Single-channel current: 2A (50% simultaneous rate)
Inductive load capacity: 1J @ ≤0.2Hz
Isolation: Photoelectric isolation, with a withstand voltage of 707V
Response time: ≤1ms
Indication: Each channel's orange LED
Power supply: K-bus bus (24V DC + 5V DC)
Power consumption: 24V ≤2.1W; 5V ≤0.4W
Operating temperature: 0℃～+60℃
Storage temperature: −40℃～+70℃
Humidity: 5%～95% (no condensation)
Protection level: IP20
Size (width × height × depth): 22.5mm × 120mm × 100mm (including plug 32.5mm)
Weight: 135g
Certifications: CE (EMC/LVD), RoHS, UL 508, EN 61131-2
IV. Design features
Super compact: Width only 22.5mm, high-density 14-channel outputs, saving cabinet space.
High reliability: Industrial-grade components, reinforced PCB, fully sealed dustproof, MTBF ≥500,000 hours.
Easy maintenance: Direct LED viewing for diagnosis, hot-swappable without shutdown for replacement.
Strong compatibility: Compatible with the entire K2-200 controller series, universal for new and old systems.
V. Typical applications
Injection / die-casting machine: Injection / mold locking / pin electromagnetic valves, heating contactors, alarm lights.
Hydraulic equipment: Injection cylinder, booster cylinder, ejector valve, cooling valve control.
Machine / machining center: Cooling pump, lubrication pump, spindle start-stop, tool change electromagnetic valve.
Automation assembly line: Conveyor belt, blocking cylinder, sorting electromagnetic valve, workstation indicator light.
VI. Installation and wiring tips Installation
Push it into the K2-200 back panel slot and lock it with the snap mechanism; it supports hot swapping. Connecting the wires
Output terminals O1 to O14 → Positive terminal of the load
Negative terminal of the load → 24V DC 0V (common terminal)
For inductive loads (electromagnetic valves / relays), it is recommended to parallel a 1N4007 diode.
Wire diameter: 0.5 to 1.5 mm² multi-strand copper wire, separate power and signal wiring.
VIII. Fault Quick Check
Fast flashing of LEDs: Corresponding channel short circuit / overload. Power off and check the circuit and the load.
No output: Check K-bus connection, backplane power supply, terminal wiring, and the condition of the load.
Incorrect operation: Check grounding, interference source, and whether a diode is connected to the inductive load.