Honeywell LG1093AA24 261A1812P012

Product Introduction:

The Honeywell LG1093AA24 is a high-density I/O module (typically 16-channel Digital Input or Analog Input variant) designed for the Experion PKS C300 distributed control system (DCS). The associated part number 261A1812P012 refers to the matching 24 VDC redundant power/interface unit that supplies and interfaces the I/O module within the C300 rack. Together they form a reliable, hot-swappable I/O node for process control in oil & gas, refining, petrochemical, and power generation plants.

Category: Honeywell

Description

Key Technical Specifications:

Manufacturer: Honeywell International Inc.
System Compatibility: Honeywell Experion PKS — C300 Controller / LS-Series I/O Rack
Module Type: Typically 16-channel Isolated Digital Input (DI) or 8/16-channel Analog Input (AI) — configurable per card version
Input Signal (DI version): 10–30 VDC (logic “1” ≥10 VDC; logic “0” ≤5 VDC), dry/wet contact selectable
Input Signal (AI version): 4–20 mA (HART-capable), 0–20 mA, ±10 V, RTD, Thermocouple (per version)
Number of Channels: 16 DI / 8 or 16 AI
Isolation: Channel-to-system and channel-to-channel opto-isolation ≥500 Vrms
Accuracy (AI): ±0.1% FS @ 25°C
Resolution: 16-bit A/D (AI); <2 ms response (DI)
Communication: Via C300 backplane to Fault Tolerant Ethernet (FTE) network — IEC 62439-3PRP compliant
Power Supply Module (261A1812P012): 24 VDC output, N+1 redundant capable, hot-swappable, LED status indication
Operating Temperature: 0 °C to +60 °C
Installation: Plug-in to C300 / LS I/O baseplate (supports live insertion)
Certifications: CE, UL 61010-1, IEC 61508SIL 2/3 (TÜV certified for safety-related applications)

Functional Features:

Per-channel open/short circuit diagnostics and over-range detection
HART digital communication pass-through (AI/HART version)
Supports redundant FTE networking for bumpless switchover
Fault action configurable (hold / fail-safe / last value)
LED diagnostics for module health, communication, and per-point status

Application Scenarios:

Refinery reactor interlock valve position feedback & ESD pushbutton inputs
Petrochemical plant BPCS (Basic Process Control System) discrete signal acquisition
Power plant turbine auxiliary system status monitoring
Lifecycle spare for legacy Experion PKS C300 I/O stations

Material & Structure:

Flame-retardant UL 94 V-0 molded housing
Gold-plated backplane connector pins
Front-panel LEDs + terminal block (or pre-wired ribbon to field termination assembly)

Installation & Notes:

Install only with correct I/O base (PM I/O base for C300)
Ensure 24 VDC clean power from 261A1812P012 or equivalent redundant PSU
Do not mix different I/O types in same slot without verifying slot addressing in Control Builder
Static discharge precaution required before handling — use wrist strap

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