Honeywell 8U-TDILB1 Redundant Digital Input Module

The Honeywell 8U-TDILB1 is a redundant digital input module built for the Honeywell Series 8 system. It serves industrial automation and process control applications, providing 32 discrete input channels and operating at 24 VDC. Designed with high reliability in mind, the module features galvanic isolation and supports hot-swapping for seamless power removal and insertion, ensuring minimal downtime in mission-critical systems.

Thanks to its redundant design, this module increases system reliability by allowing continuous operation, even in case of failure. With an input voltage range from 18 to 30 VDC, the 8U-TDILB1 also delivers protection against electrical noise using 1000 VAC RMS isolation.

Key Features:

Redundant Design: Boosts reliability and fault tolerance for safety-critical applications.
32 Discrete Inputs: Provides ample channels for various industrial needs.
Galvanic Isolation: Ensures protection against electrical interference with 1000 VAC RMS or +1500 VDC isolation.
Power Removal/Insertion: Supports hot-swapping, allowing easy module maintenance without shutting down the system.
Excitation Power: Eliminates the need for external marshalling power, streamlining installation.
Direct/Reverse Input Indication: Facilitates troubleshooting and diagnostics with clear input status.

Technical Specifications:

Parameter	Specification
Model Number	8U-TDILB1
Number of Input Channels	32
Voltage Rating	24 VDC
Dl Power Voltage Range	18 to 30 VDC
Module Current Rating	95 mA
Galvanic Isolation	1000 VAC RMS or +1500 VDC
ON Sense Voltage/Current	13 VDC (min) or 3 mA (min)
OFF Sense Voltage/Current	5 VDC (max) or 1.2 mA (max)
Input Impedance	4.2 KΩ
Absolute Delay (Input Filter + Isolation)	5 ms ± 20%
Field Resistance for Guaranteed ON Condition	300 Ω max @ 15 VDC
Field Resistance for Guaranteed OFF Condition	30 KΩ min @ 30 VDC