8109-DI-DC

Overview

MTL 8109-DI-DC is an 8-channel discrete input module for 24 V DC isolated sinking applications, designed for high-speed digital signal acquisition.

Input Specifications

• Number of Channels: 8

• OFF Voltage: < 3.2 V DC

• ON Voltage: > 11 V DC

• Wetting Current: 6.3 mA (nominal) @ 24 V DC

• Minimum Pulse Width: 3 ms

• Max Switching Frequency (no filtering): 200 Hz

• Max Input Voltage: 30 V DC

• Max Reverse Voltage: -25 V DC

Configurable Parameters

• Input Filter: Fast, slow, or user-defined (0–512 ms in 2 ms steps)

• Latch Inputs: Enable / Disable

• Latch Polarity: Latch on high / Latch on low

• Pulse Counting: Enable / Disable

Response Time

• I/O Response: ≤ 3 ms (field event to Railbus data availability)

Safety Ratings

• FM Non-Incendive Field Wiring (per channel):

  • Vmax: 30 V

  • Imax: 100 mA

  • Ci: 0 μF

  • Li: 0 mH

Power Supply

• Railbus (12 V) Current:

  • Typical: 35 mA

  • Maximum: 55 mA

• Bussed Field Power: Not required

Mechanical Specifications

• Module Key Code: B2

• Module Width: 42 mm

• Weight: 170 g

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