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DEM401 Digital Input Module

DEM401 is a marine-grade digital input module manufactured by STN Atlas / SAM Electronics, belonging to NAVIS marine automation control system. It collects discrete digital switching signals from shipboard limit switches, relay contacts, sensors and interlock devices, converts external field signals into bus data for main controller processing.
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DEM401 Product Specification
Basic Information
Brand: STN ATLAS (SAM ELECTRONICS / Ultra Electronics)
Model: DEM401
Order Number: DEM401 (Part No.271.130 424C)
Product Name: Digital Input Module
Origin: Germany
HS Code: 8538909000
Dimensions: 225mm × 115mm × 35mm
Weight: 0.53kg


Input & Output Electrical Parameters
Input
1. Power Supply Input: 24VDC ±20%, rated current 210mA, power consumption ≤5W
2. Field Digital Input: 32-channel isolated DI, support dry contact / 24VDC wet contact signal
3. Isolation Mode: Optocoupler isolation per channel, isolation voltage 1500VAC
4. Signal Response Time: ≤1ms
Output
1. Backplane Bus Data Output: Internal system bus communication for rack data transmission
2. LED status indicator output for channel status & module fault diagnosis
3. No external physical field output terminals

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