8C-PDILA1 51454471-175 Honeywell Series 8 Digital Input Module

Product Description

Configured for 24 VDC discrete signal acquisition in the Honeywell Series 8 I/O system, the Honeywell 8C-PDILA1 51454471-175 (8C-PDILA1 Digital Input Module) provides 32 input channels for field-state detection. The module accepts 18 to 30 VDC DI power and uses optical isolation within the IOM. It also supports optional I/O redundancy through a second IOM installed on the same IOTA.

Hardware Specifications

Series 8 Digital Input Signal and Redundancy

The 8C-PDILA1 processes discrete field signals within the Series 8 I/O architecture. The 32 input channels accept DC field states within the specified 18 to 30 VDC input range. The input circuit provides defined ON and OFF thresholds, while the 4.2 KOhm input impedance establishes the electrical loading seen by the connected field circuit.

The IOM uses optical isolation in the input path. The specified system isolation is 1000 VAC RMS or +/-1500 VDC. In addition, the module incorporates internal diagnostics for data integrity.

For redundant operation, the Series 8 architecture can place a second IOM on the same IOTA. This arrangement provides the specified optional redundancy without separate external redundancy cabling or dedicated redundancy control hardware.

Frequently Asked Questions

Q: How many digital input channels does the 8C-PDILA1 provide?
A: The module provides 32 digital input channels.

Q: What DC voltage range does the 8C-PDILA1 accept?
A: The specified DI power voltage range is 18 to 30 VDC. The ON sense threshold is 13 VDC minimum, while the OFF sense threshold is 5 VDC maximum.

Q: How is redundancy implemented for the 8C-PDILA1?
A: Optional redundancy is implemented on the IOTA by adding a second IOM. The supplied data specifies that no external redundancy cabling or separate redundancy control device is required.

Field Installation Guidelines

Install the 8C-PDILA1 in the designated Honeywell Series 8 I/O and IOTA assembly according to the applicable system hardware documentation.

Verify that the connected field circuits remain within the specified 18 to 30 VDC input range. Check the field wiring polarity and confirm that ON and OFF voltage levels remain within the specified sensing thresholds.

Keep discrete input wiring separated from high-voltage power conductors and high-noise switching circuits where practical. Use appropriate shield termination practices when shielded field cable is required by the installation design.

Before energizing the I/O assembly, inspect terminal connections, wiring insulation, connector engagement, and field circuit continuity. For redundant configurations, install the second IOM on the designated IOTA and follow the system documentation for module pairing and configuration.

Do not apply operating-temperature, power-consumption, hot-swap, or firmware-compatibility values that are not specified in the available module data.

Other Attributes

• Series: Honeywell TDC3000
• Country of Origin:  USA
• Lead Time: In Stock, 2 Working Days

In Stock Hot Items of Honeywell

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