Honeywell System 57 5704 Control System

Honeywell System 57 5704 Control System

The Honeywell System 57 5704 control system is a modular control platform designed specifically for industrial gas detection under Honeywell. It is mainly used to monitor gas detectors installed on site, achieve multi-channel gas concentration monitoring, alarm triggering, and remote control functions. This system has the core advantages of high reliability, flexible scalability, and strict safety compliance, and is widely used in industrial scenarios such as petrochemicals, chemical engineering, pharmaceuticals, and power that require strict gas leak detection. It can be adapted to various types of gas sensors such as catalytic combustion and 4-20mA.

System core positioning and security standards

1. Core functions and scope of application

Multi channel monitoring capability: The standard 19 inch 3U rack can support up to 64 channels of gas detection (4 channels per card), and the half 19 inch 3U rack can support up to 32 channels, adapting to the distributed monitoring needs of large-scale industrial sites.

Sensor compatibility: Supports two types of core sensor inputs - catalytic combustion sensors (for combustible gas detection) and 4-20mA signal sensors (for toxic gas, oxygen, etc. detection), meeting the monitoring needs of different gas types.

Alarm and Control: Provides multi-level alarms (A1/A2/A3 three-level concentration alarm, STEL short-term exposure limit alarm, LTEL long-term exposure limit alarm), fault alarms (sensor faults, line faults), and suppression alarms, supports relay output, analog output (0-20mA/4-20mA), and can be linked to external devices (such as exhaust systems, sound and light alarms).

2. Safety and compliance requirements

Environmental restrictions: Non explosion proof design, only applicable to safe areas (non hazardous areas), and limited to indoor use only. Exposure to rainwater or humid environments is prohibited.

Operating standards: Installation, calibration, and maintenance must be carried out by professionals, and only Honeywell certified accessories are allowed to be used to avoid safety risks caused by unauthorized replacement of components.

Compliance standards: Compliant with the EU ATEX Directive (EC Type Examination Certificate BVS 04 ATEX G 001 X), EN 50073 (Specification for Selection and Maintenance of Gas Detection Equipment), EN 60079-14 (Standard for Electrical Installation in Hazardous Areas), etc. Electromagnetic compatibility (EMC) meets the EN 61000-6 series standards, and the ability to resist radio frequency interference (RFI) reaches 10V/m (27-1000MHz).

System hardware composition and module functions

The 5704 control system adopts a modular design, with core components including control cards, interface cards, engineering cards, power modules, and racks/cabinets. Each module has clear functions and can be flexibly combined

1. Core functional modules

Module Name Model Example Core Function Key Parameters

Four channel control card 05704-A-0144 (catalytic input)

05704-A-0145 (4-20mA input) sensor signal processing, concentration display, alarm logic judgment, 4 channels per card; The catalytic card supports constant current drive of 90-315mA; 4-20mA card supports 0-25mA signal measurement

The four relay interface card 05704-A-0121 provides a wiring interface for sensors and control systems, providing four relay outputs (single pole double throw) with a rated current of 5A (110/250V AC or 32V DC) for relay contacts; Supports 2.5mm ² (14 AWG) wire connection

Relay expansion component 05704-A-0131 (interface card+expansion card) expands the number of relays to 16 (12 single pole double throw+4 single pole single throw), adapting to complex alarm linkage requirements and occupying 2 rack slots; Extra weight of 0.5kg, requires separate power supply

The core operating interface for system configuration, calibration, and diagnosis of engineering card 05701-A-0361 provides RS232 interface for connecting to PC or printer to support parameter adjustment (such as alarm threshold, sensor current), fault diagnosis, and maintenance record printing; Engineering key is required to unlock advanced features

DC input card 05701-A-0325 system power access and distribution, supports dual power input (main power+backup battery), provides overcurrent protection input voltage 18-32V DC; Built in 10A anti surge fuse; Support power diode isolation to avoid power conflicts

AC-DC power module 05701-A-0405 (16 channels)

05701-A-0406 (8-way) converts 85-264V AC to 24V DC system power supply, supports power upgrade (50W → 200W), 50W basic module can be expanded to 200W (16 way rack); Input frequency 47-440Hz, compatible with global power grid

2. Rack and cabinet configuration

Rack types: Four standard racks are available -19 inch 3U (rear wiring), 19 inch 6U (front wiring), half 19 inch 3U (rear wiring), half 19 inch 6U (front wiring), supporting both front and rear wiring methods to meet different on-site wiring requirements.

Cabinet accessories: Optional wall mounted cabinet (8/16 channels), made of cold-rolled steel plate material (RAL 7015 dark gray), providing multiple cable entry holes (M20/M25/PG11/PG16), with dust-proof and safety lock functions to protect internal modules from physical damage.