8811-IO-DC

Overview

8811-IO-DC is a non-isolated discrete I/O module with configurable input/output functions.

Identity

• Part Number: 8811-IO-DC

• Type: Discrete I/O Module

• Lifecycle Status: Active

• Channels: 8 (independently configurable as inputs or outputs)

Electrical Characteristics

• System Power Consumption: 70 mA max (50 mA typ.)

• Field Power Consumption: 50 mA max (inputs only); 50 mA + output load (outputs)

• Input Ratings:

  • ON/OFF Threshold Current: 0.9 mA typ.

  • O/C Voltage: 24 VDC typ. (depends on BFP supply)

  • Wetting Current: 1.2 mA typ.

  • Minimum Pulse Width Detected: 5 ms

  • Max Input Frequency (pulse counting mode, no debounce): 30 Hz

• Output Ratings:

  • Max Current per Channel: 2 A

  • Max Current per Module (continuous): 6 A

  • Max Current per Module (non-continuous <10 s): 8 A

• Isolation: 250 VAC (any channel to Railbus)

Configurable Parameters

• Input Options:

  • Filter Time Interval: 0–8 s (1 ms steps)

  • Earth Leakage Detection: ON/OFF

  • Latch Inputs: enable/disable

  • Latch Polarity: latch on high / latch on low

  • Pulse Counting: up transition / down transition / disable

  • Line Fault Detection: none / open circuit / open & short circuit

• Output Options:

  • Output Type: pulse / discrete / pattern

  • Pulse Width: 1 ms to 60 s

  • Line Fault Detection: open line & short circuit detect / disable

Performance

• Response Time:

  • Input signal change to Railbus availability: ≤5 ms

  • Railbus command to output change: ≤1 ms

• Resistance Measurement Accuracy:

  • Normally de-energized output open/short detection with forward biased test current: ±(3.4% + 5.3 Ω) for line resistance ≤220 Ω; greater of ±7% or ±(3.1% + 27 Ω) for >220 Ω, <1 kΩ

  • With reverse biased test current: greater of ±7% or ±(3.1% + 430 Ω)

Hazardous Area Specification

• Protection Technique: EEx nA nL IIC T4

• Location Certification: FM and CSA Class 1, Div. 2, Groups A, B, C, D T4

Mechanical Characteristics

• Module Key Code: B6

• Width: 42 mm

• Weight: 210 g

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