Honeywell DC-TDIL01 51307780-176 Digital Input Module

Technical Overview

The Honeywell DC-TDIL01 (part number 51307780-176) is a high-performance digital input module engineered for the Experion PKS and Series C distributed control systems . This module acquires discrete 24 VDC signals from field devices such as limit switches, proximity sensors, pushbuttons, and relay contacts, converting them into reliable digital data for the C200 or C300 controller .

The Honeywell DC-TDIL01 features 32 optically isolated input channels arranged in a compact IOTA (Input/Output Termination Assembly) form factor . Its robust isolation architecture effectively protects the control system from electrical noise, ground loops, and voltage transients. The module supports both sinking and sourcing input configurations, adapting to various field wiring standards without additional hardware modifications .

Technical Specifications

Parameter	Specification
Manufacturer	Honeywell
Model Number	DC-TDIL01
Part Number	51307780-176
Product Type	Digital Input IOTA Module
System Compatibility	Experion PKS, Series C, TDC 3000
Input Channels	32 discrete inputs
Nominal Input Voltage	24 VDC
Input Voltage Range	18–30 VDC
Input Current per Channel	7 mA typical
Input Impedance	4.2 kΩ
ON Sense Voltage	≥13 VDC
OFF Sense Voltage	≤5 VDC
Signal Delay	5 ms ±20%
Isolation Voltage	1500 VAC (input to system)
Power Consumption	4.56 W maximum
Operating Temperature	0°C to +60°C
Storage Temperature	-40°C to +85°C
Dimensions (W x H x D)	3.8 x 12.7 x 19.1 cm
Weight	0.4 kg
Mounting Type	DIN rail, Series C IOTA baseplate
Certifications	CE, UL, CSA, ATEX Zone 2
Country of Origin	USA

Key Features

High-Density Channel Architecture – The Honeywell DC-TDIL01 provides 32 discrete input channels in a single compact module, maximizing cabinet space efficiency and reducing system costs .

Robust Galvanic Isolation – The 1500V AC isolation between input channels and the system bus effectively protects control electronics from electrical noise and ground loops .

Diagnostic LED Indicators – Individual channel status LEDs and module health indicators accelerate commissioning and simplify troubleshooting .

Hot-Swap Capability – Users can replace the module without powering down the system when configured with redundant controllers, minimizing process interruption .

Configurable Input Logic – The module supports both positive and negative logic configurations, adapting to existing site wiring standards without additional hardware .

Conformal Coating Protection – The optional G3 conformal coating guards against moisture, dust, and corrosive gases, ensuring reliable operation in harsh industrial environments .

Applications

The Honeywell DC-TDIL01 excels in oil and gas production, chemical processing, power generation, and pharmaceutical manufacturing environments . It provides reliable digital input acquisition for valve position monitoring, pump status feedback, limit switch detection, and emergency shutdown system interlocks within Experion PKS-based distributed control systems .