KEBA K2-400-DI470A | 24VDC NPN/PNP Compatible Input Module, DIN Rail Mount

Description

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Key Technical Specifications

Product Introduction

KEBA K2-400-DI470A is a high-density 32-channel digital input module designed exclusively for the KEBA K2-400 PLC platform. It captures binary signals from proximity sensors, limit switches, safety interlocks and pushbuttons on production machinery. Optical isolation separates field-side circuits from the PLC backplane bus to suppress electrical noise and transient voltage spikes. Adjustable input filtering helps filter out contact bounce and high-frequency interference, making it stable for harsh workshop environments. The compact form factor maximizes cabinet space utilization for high I/O count layouts.

KEBA K2-400-DI470A

KEBA K2-400-DI470A

KEBA K2-400-DI470A

KEBA K2-400-DI470A

Application Scenarios & Field Experience

This DI module is widely deployed on KEBA-controlled standalone machines and automated production lines.

1. Injection molding machines: Mold position detection, safety door interlock, limit switch signal acquisition
2. Packaging machinery: Photoelectric sensor counting, conveyor position feedback, cylinder position signal
3. Metal forming & machine tools: Clamp confirmation, emergency stop chains, tool change position feedback
4. General assembly automation: Pick-and-place station sensors, fixture status signals

A packaging line had random false trigger alarms from photoelectric switches. The original module used the default 0.1ms filter setting, which picked up electromagnetic noise from nearby servo drives. After replacing the unit and reconfiguring the filter to 3ms, false signals disappeared completely without slowing down normal detection response.

Standard Operating Procedure (SOP) for Quality Control

• Visual Inspection: Check housing, terminal blocks, gold-plated backplane connectors, confirm no scratches, pin bending or burn marks.
• Hardware Revision Check: Match part number 54943 and hardware revision against the K2-400 compatibility list.
• Power & LED Test: Mount on a K2 backplane, supply 24VDC, verify power LED and channel indicator response.
• Channel Function Test: Apply 24VDC signal to each channel one by one, confirm correct LED trigger and signal transmission to the PLC CPU.
• Noise & Filter Verification: Test under different filter settings to validate bounce suppression performance.
• ESD Packaging: Pack in anti-static bag with foam protection, attach ESD warning labels before shipment.

Frequently Asked Questions (FAQ)

Q1: Can K2-400-DI470A work with other KEBA PLC series outside K2-400? A: No. It uses the proprietary K2-400 backplane bus and is only compatible with the K2-400 controller series. It cannot be inserted into other KEBA PLC racks.

Q2: Can I switch freely between NPN and PNP sensors on this module? A: Yes, the hardware supports both sinking and sourcing 24V signals. You only need to match the common wiring scheme on the terminal side.

Q3: What is the warranty term? A: 12 months warranty starting from shipment date. Warranty excludes damage caused by reverse polarity, overvoltage, wiring error or mechanical terminal damage.

Q4: Can I replace this module while the PLC rack is powered on? A: Hot swap is not supported. Power down the rack before removal or installation to avoid backplane bus fault or module damage.

Q5: How to choose the proper input filter time? A: Use 0.1ms for fast high-speed sensors; 1–3ms for general photoelectric and proximity switches; 10ms for mechanical limit switches with heavy contact bounce.