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Honeywell 8C-TDILA1 51307141-175 Series 8 Digital Input Module

Configured for 32 channel discrete signal acquisition in Honeywell Experion PKS Series 8 I/O systems, the Honeywell 8C-TDILA1 51307141-175 (8C-TDILA1 Digital Input Module) provides direct electrical execution for field contact monitoring and logic state detection.

Hardware Specifications

Parameter	Specification
Model	8C-TDILA1 51307141-175
Brand	Honeywell
Product Type	Digital Input Module
Series	Series 8 I/O
Origin	USA
Weight	0.4 kg
Dimensions	22 x 12 x 6.5 cm
Power Consumption	95 mA at 24 VDC
Input Channels	32 channels
Input Channel Scanning (PV)	Normal: 20 ms
Voltage Rating	24 VDC
DI Power Voltage Range	18 to 30 VDC
ON Sense Voltage/Current	13 VDC
OFF Sense Voltage/Current	5 VDC max or 1.2 mA max
Galvanic Isolation	1000 VAC RMS or +/-1000 VDC
Module Type	Digital Input
IOTA Configuration	Coated IOTA

Channel Isolation and DCS Signal Processing

The Honeywell 8C-TDILA1 51307141-175 uses galvanic isolation to separate field wiring from internal module circuits. Therefore, the module reduces electrical interference between discrete input channels and the controller interface.

The module monitors ON and OFF field states through voltage threshold detection. Additionally, it performs input scanning at 20 ms intervals for process variable updates within the Series 8 I/O architecture.

Honeywell process control modules commonly integrate with DCS signal handling requirements, including channel-to-channel isolation methods used for discrete field acquisition. However, this module is designed specifically for digital contact inputs rather than analog communication protocols such as 4-20 mA HART or FOUNDATION Fieldbus.

Frequently Asked Questions

Q: How many digital input channels does the Honeywell 8C-TDILA1 51307141-175 support?
A: The module provides 32 digital input channels for discrete field signal monitoring.

Q: What field voltage range does the 8C-TDILA1 support?
A: The digital input power voltage range is 18 to 30 VDC, with a rated module voltage of 24 VDC.

Q: Does the module provide electrical isolation between field signals and internal circuits?
A: Yes. The module provides galvanic isolation rated at 1000 VAC RMS or +/-1000 VDC.

Field Installation Guidelines

• Install the 8C-TDILA1 51307141-175 module in the designated Honeywell Series 8 I/O assembly with the compatible IOTA interface.
• Verify that the field power supply remains within the specified 18 to 30 VDC input range before wiring.
• Separate digital input signal cables from high-current power cables to reduce electrical noise coupling.
• Connect cable shields according to site grounding practices and avoid multiple grounding points that may introduce ground loops.
• Confirm field device contact states before commissioning the module to validate ON and OFF sensing thresholds.
• Check module seating, connector engagement, and backplane interface condition during installation inspection.

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