Honeywell 05701‑A‑0329 System 57 Triple DPCO Relay Output Card

Description

Product Overview

The Honeywell 05701‑A‑0329 is a plug‑in relay output module designed for Honeywell Zellweger System 57 rack‑mount fire‑and‑gas monitoring system. It delivers three independent DPCO dry‑contact relay outputs, assigned for A1/A2/A3 alarm, fault or inhibit status signals. It converts internal rack‑system logical alarm signals into hard‑relay dry‑contact signals to trigger external audible‑visual alarms, safety interlock equipment and remote annunciator panels. Each relay channel has dedicated LED status indicator for fast‑on‑site diagnosis. Hot‑swappable card design allows replacement without shutting down the whole rack system. Widely used for spare‑part replacement and maintenance of legacy System 57 gas safety‑monitoring cabinets in petrochemical, refinery and offshore‑platform hazardous‑area sites.

Series

System 57 modular fire‑and‑gas safety‑monitoring hardware platform by Honeywell Zellweger Analytics. The rack‑based system consists of gas‑detection control cards, field‑interface cards, relay‑output cards, DC‑input power‑interface cards and backplane assemblies for continuous toxic‑gas and combustible‑gas safety‑monitoring in industrial hazardous‑location cabinets.

Product Features

1. Three independent DPCO (Double Pole Change‑Over / DPDT) relay output channels for safety‑status dry‑contact output
2. Relay contact rating: 10A @28 VDC, capable of driving external alarm horns, beacons and remote interlock‑relay loads
3. Each channel equipped with dedicated LED indicator for real‑time relay‑action status visualization for quick troubleshooting
4. Receives alarm / fault / inhibit logic command from System57 gas‑control cards via rack backplane
5. Hot‑swap‑capable plug‑in card; single‑card replacement will not interrupt operation of other channels inside the rack
6. 3U compact form‑factor, directly inserts into Honeywell System 57 standard 19‑inch sub‑rack chassis
7. Dry‑contact isolation design isolates rack internal circuit from external field‑load wiring
8. Industrial‑grade hardware design for long‑term 24‑hour continuous‑operation in safety‑monitoring cabinets

Product Parameters

Product Specifications

• Physical form: 3U plug‑in relay‑output card for Honeywell System 57 sub‑rack
• Condition: New surplus / Tested used (stock subject to real‑time confirmation)
• Warranty: 365‑day warranty for supplied units
• Shipment: In‑stock goods ship within 3 working days after payment

Function

Receives alarm, fault and inhibit logical commands from System 57 gas‑control cards through rack backplane; controls three‑group DPCO relay contact‑closure / opening; outputs isolated dry‑contact signals to drive external audible‑visual alarm devices and remote interlock‑equipment; provides LED status feedback for each relay‑channel action state.

Purpose

Provide hard‑relay dry‑contact alarm‑output interface for Honeywell System 57 fire‑and‑gas monitoring rack; realize on‑site audible‑visual alarm triggering and remote safety‑interlock signal transmission.

Application Fields

‑ Petrochemical‑plant System 57 gas‑detection‑cabinet relay‑card spare‑part‑replacement‑ Oil‑gas‑site and offshore‑platform legacy fire‑and‑gas‑monitoring‑system maintenance‑ Refinery hazardous‑area gas‑monitoring‑rack retrofits‑ Chemical‑plant Honeywell Zellweger System 57‑system overhaul‑projects‑ Hazard‑process‑industrial‑site fixed‑gas‑safety‑monitoring‑cabinet‑repair

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Contact info

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