Model Interpretation

05701-A = System57 Series; 0330 = 4-Channel Relay Output Card Version Technical Specifications

Power supply: DC24V; 4 independent passive relays; contact specifications: AC250V/5A, DC30V/5A; operating temperature: -20℃ to +60℃; no electrical isolation between channels; total power consumption ≤ 2.8W, CE explosion-proof certification.

Interface and communication configuration

Backplane gold fingers for system data and power supply; front-end terminal blocks for on-site loads; panel RUN/Fault indicator lights. Core function

The secondary alarm trigger relay of the gas system closes and outputs an interlock; a short circuit fault in the output circuit triggers an alarm; the alarm parameters are stored when the power is off. Applicable scenarios

FGS fire protection system local interlock drive spare parts replacement for chemical plants and oil depots.

Operating instructions for use and maintenance

Install fuses at the load end; separate the power lines from the instrument lines; conduct quarterly inspections of contact wear. 05701-A-0351

Product Introduction

System57 dedicated RS485 Modbus communication gateway module. All gas data from all channels are summarized and remotely transmitted via Modbus-RTU to the DCS/PLC upper-level system.

Model interpretation

05701-A = System57 series; 0351 = Modbus communication card version Technical Specifications

DC 24V power supply; RS485 two-wire system, Modbus-RTU standard; baud rate selectable 2400/9600/19200; communication isolation 1500VAC; operating temperature -20 to +60℃.

Interface and communication configuration

The backplane connects to the rack bus to collect all cabinet measurement point data; the front-end terminals lead out A/B communication lines to connect to the DCS; the panel communication receiving and transmitting, and fault indicator lights. Core function

The gas concentration, faults and alarm information of the entire machine are packaged and uploaded to the upper level; diagnosis and alarm for communication disconnection; software jumper settings for station address. Applicable scenarios

Renovation project of the old System57 gas detection system for integration with DCS.

Operation and maintenance instructions

Shielded twisted-pair cable for 485 bus, 120Ω termination resistors at both ends of the bus; Wiring should be kept away from the power cables of the frequency converter.