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8C-PDIL51 51454359-175

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Honeywell 8C-PDIL51 51454359-175 is a 32-channel, 24 VDC digital input module for Series 8 process I/O applications.
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Technical specifications for 8C-PDIL51 51454359-175

  • Manufacturer:
    Honeywell
  • Part Number:
    8C-PDIL51 51454359-175
  • Product Family:
    Honeywell Experion PKS ( C200, C300 )
  • Product Type:
    Digital Input 24VDC Module
  • Stock:
    1
  • Input Channels:
    32
  • Field Power Range:
    18 to 30 VDC
  • Isolation Technique:
    Optical isolation in IOM
  • System-to-Field Isolation:
    1000 VAC RMS
  • ON Threshold:
    13 VDC minimum or 3 mA minimum
  • OFF Threshold:
    5 VDC maximum or 1.2 mA maximum
  • Input Impedance:
    4.2 kΩ
  • Input Delay:
    5 ms ±20%
  • Weight:
    0.3 kg
  • Estimated shipping dimensions:
    6x15.7x14.2cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Input Channels Signal Thresholds Installation Boundary Product Applications

Features:

  • Thirty-two inputs: Consolidates 32 discrete field states in one Series 8 input module.
  • 24 VDC interface: Uses the published 18 to 30 VDC field-power range and defined ON/OFF thresholds.
  • Isolated signal path: Optical isolation separates the input circuitry from the system side.
8C-PDIL51 51454359-175 is identified as a Honeywell Series 8 digital input module for discrete process signals.

Its thresholds, input impedance, and delay determine how field contacts and powered devices are interpreted by the control system.

The exact 8C prefix, part number, termination hardware, channel map, and configuration should remain together during replacement review.

Apter Power supports 8C-PDIL51 51454359-175 enquiries with sourcing, documentation, part-number review, and Series 8 configuration guidance.
Honeywell 8C-PDIL51 51454359-175 Digital Input 24VDC Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Channel capacity: The module handles 32 discrete 24 VDC input points.
  • Field supply: Inputs operate from user-supplied 18 to 30 VDC power.
  • Input loading: Each channel presents approximately 4.2 kΩ impedance.
  • Isolation: Optical isolation provides a published 1000 VAC RMS field-to-logic barrier.
  • ON state: The channel is recognized ON at 13 VDC minimum or 3 mA minimum.
  • OFF state: The channel is recognized OFF at 5 VDC maximum or 1.2 mA maximum.
  • Response path: Input filtering and isolation add approximately 5 ms ±20% delay.
  • Diagnostic boundary: This PDIL51 function does not provide open-wire detection, so an open circuit can appear as an OFF state.
  • Exact identity: Preserve both 8C-PDIL51 and 51454359-175 during spare selection.
  • Termination fit: Match the installed Series 8 termination assembly, keying, field-power arrangement, and wiring map.
  • Redundancy design: Confirm whether the cabinet uses the documented nonredundant or redundant termination architecture.
  • Commissioning record: Retain input polarity, direct or reverse indication, channel assignment, and control-strategy references.
  • Contact monitoring: Reads limit, status, alarm, and interlock contacts presented as 24 VDC states.
  • Process I/O: Concentrates 32 field-status points for Honeywell control strategies.
  • Isolated acquisition: Separates the field circuits from module logic through optical isolation.
  • Maintenance replacement: Supports exact-module review where channel mapping, termination, redundancy, and field power must be retained.
Description
8C-PDIL51 51454359-175 is a Honeywell Series 8 digital input module that accepts 32 discrete 24 VDC field signals. The module uses optical isolation in the input circuitry and is specified for user-supplied field power within the published input range.

For signal recognition, 8C-PDIL51 51454359-175 uses an ON threshold of at least 13 VDC or 3 mA and an OFF threshold of no more than 5 VDC or 1.2 mA. Its 4.2 kΩ input impedance and approximately 5 ms input-filter and isolation delay define how field transitions reach the control strategy.

Replacement work on 8C-PDIL51 51454359-175 should preserve the exact module identity, compatible termination hardware, field-power arrangement, input polarity, channel allocation, and Series 8 configuration. A similarly named CC-prefix module should not be treated as the same item without an engineering comparison.
Alternative Names
8C-PDIL51 51454359-175 8C PDIL51 51454359 175 8CPDIL5151454359175 Honeywell 8C-PDIL51 Honeywell 51454359-175 8C-PDIL51-51454359-175 Series 8 8C-PDIL51
Technical notes
The 8C-PDIL51 input path recognizes discrete states using published voltage and current thresholds, then applies optical isolation and an approximately 5 ms input delay. Reliable replacement depends on matching the exact 8C identity, Series 8 termination hardware, field power, channel mapping, and control configuration before re-energizing the channel.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How should a channel that stays OFF on 8C-PDIL51 51454359-175 be investigated?
Check field voltage and current at the terminal, input polarity, wiring continuity, common return, channel mapping, and configured indication.
Why can 8C-PDIL51 51454359-175 report OFF even when the field circuit is open?
The PDIL51 function has no open-wire detection, so an open conductor can be indistinguishable from a valid OFF state.
What must be preserved before swapping 8C-PDIL51 51454359-175?
Capture channel assignments, terminal numbers, field-power source, direct or reverse settings, keying, and redundancy arrangement.
How does the input threshold affect troubleshooting 8C-PDIL51 51454359-175?
A measured voltage between the specified ON and OFF thresholds may not represent a deterministic logic state.
What determines the termination arrangement for 8C-PDIL51 51454359-175?
The installed Series 8 cabinet design, IOTA type, redundancy requirement, keying, and field-power distribution determine the arrangement.
What evidence should accompany an RFQ for 8C-PDIL51 51454359-175?
Provide both identifiers, cabinet and IOTA details, hardware revision, redundancy mode, and photographs of the installed labels and connectors.

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