Model Explanation

05701-A: Basic Series Code for System57 Control Card;

-0301: 4-20mA Current Input Version;

-0302: Dedicated Version for Catalytic Sensing. Technical Specifications

Power Supply: DC18~32V (standard 24VDC cabinet power supply);

Power Consumption: 0301 typical 3.25W, 0302 including catalytic probe 3.75W;

Dimensions: 170×25×112mm, net weight approximately 165g;

Operating Environment: -20℃~+70℃, humidity 5%~95% without condensation;

Accuracy: Alarm setting resolution 1% FS, long-term temperature drift < ±2%/6 months;

Panel: 4 segments of digital + 25 segments of light column liquid crystal display, A1/A2/A3 three-level alarm LED, fault / shielding indicator light, manual reset button;

Certification: ATEX explosion-proof, CE industrial safety certification.

Interface and Communication Configuration

Backside gold finger plug connects to the backplane of System57 system rack;

Front end terminals: signal lines for on-site detectors are connected, onboard passive relays for alarm contacts (3 groups of alarm quantity outputs);

Optional daughter card: can be equipped with isolation 4~20mA transducer output daughter card, Modbus-RTU communication daughter card (配套 engineering debugging card realizes networking and remote transmission). Core function

Real-time collection of single-path gas concentration, on-site liquid crystal display + light column display;

Three-level programmable threshold alarm, relay passive contact linkage for exhaust / shutdown interlock;

Hardware fault self-check for probe short circuit and line short circuit + panel fault light alarm;

EEPROM parameter storage, power-off preservation, and on-site calibration and correction through system engineering card;

Remote alarm suppression, alarm delay start/stop configuration function. Applicable scenarios

Replacement of spare parts for combustible/toxic gas detection cabinets in refining and petrochemical plants, oil and gas stations, pharmaceutical factories, and coal chemical plant areas. Maintenance and expansion of the System57 old gas alarm system.

Operation and Maintenance Instructions

Select shielded twisted-pair cables for the probe, keeping them away from power frequency cables;

Perform single-point calibration of the probe's zero point and range every 6 months, and tighten the connection terminals;

In corrosive chemical environments, clean the circuit boards of dust quarterly, store spare parts in a moisture-proof and light-proof environment;

Before replacing the card components, check the probe type. 0301 and 0302 cannot be mixed and used interchangeably.