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Description

The Honeywell 8C-TDILB1 (51307143-175) is a 32-channel Digital Input Module designed for the Experion LX distributed control system. This module provides high-density digital input monitoring with integrated features for data integrity and system reliability. It supports redundant configurations, making it suitable for critical process automation applications where continuous operation is required.

Features

• 32-channel digital input capacity.
• Supports optional redundancy for high-availability requirements.
• Extensive self-diagnostics to ensure data integrity and fault detection.
• Internal or external field power selection with on-board excitation power, reducing the need for external marshalling power.
• Configurable direct or reverse input indication.
• Galvanic isolation via optical coupling within the IOM.

Technical Specifications

Parameter	Specification
Product Model	8C-TDILB1 (51307143-175)
Input Channels	32
Voltage Rating	24 VDC
DI Power Voltage Range	18 to 30 VDC
Module Current Rating	95 mA
ON Sense Voltage/Current	13 VDC (min) / 3 mA (min)
OFF Sense Voltage/Current	5 VDC (max) / 1.2 mA (max)
Input Impedance	4.2 KΩ
Galvanic Isolation	1000 VAC RMS or ±1500 VDC for System
Input Filter Delay	5 ms ± 20%

Installation Guidelines

• Ensure the system power is disconnected before installing or removing the module from the I/O rack.
• The module should be handled using standard ESD (Electrostatic Discharge) protection practices to prevent damage to internal circuitry.
• Verify that the field power supply is within the 18-30 VDC range before connecting field wiring.
• Ensure proper seating in the IOTA (I/O Termination Assembly) to maintain reliable electrical contact.
• Route signal cables away from high-voltage or high-EMI sources to minimize signal interference.

FAQ

Does this module support redundant operation?

Yes, the 8C-TDILB1 is designed to support optional redundancy, allowing for high-availability configurations within the Experion LX system.

Does the module require external power for field devices?

The module features on-board excitation power, which can eliminate the need for external marshalling power, depending on the specific field device requirements and power budget.

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